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Text S1. Details on methodology. Table S1. Details on provenance of Pilosella rhodopea material used for particular analyses. Table S2. Dataset for 63 plants of Pilosella rhodopea included in the greenhouse experiment. Figure S1. Well-developed and aborted seeds of Pilosella rhodopea. Figure S2. Habitus and vegetative growth characteristics of diploid and autopolyploid plants of Pilosella rhodopea. Figure S3. Percentage of euploid and aneuploid seed progeny produced by diploid, autotriploid and autotetraploid plants of Pilosella rhodopea in natural primary contact zones. Figure S4. Photomicrographs of somatic metaphases in two aneuploid Pilosella rhodopea progeny produced by two triploid (2n = 27) mother plants. Figure S5. Flow cytometric screening analyses of seeds produced by diploid and autopolyploid plants of Pilosella rhodopea.

Apomixis, the asexual formation of seeds, is a potentially valuable agricultural trait. Inducing apomixis in sexual crop plants would, for example, allow breeders to fix heterosis in hybrid seeds and rapidly generate doubled haploid crop lines. Molecular models explain the emergence of functional apomixis, i.e., apomeiosis + parthenogenesis + endosperm development, as resulting from a combination of genetic or epigenetic changes that coordinate altered molecular and developmental steps to form clonal seeds. Apomixis-like features and synthetic clonal seeds have been induced with limited success in the sexual plants rice and maize by using gene editing to mutate genes related to meiosis and fertility or via egg-cell specific expression of embryogenesis genes. Inducing functional apomixis and increasing the penetrance of apomictic seed production will be important for commercial deployment of the trait. Optimizing the induction of apomixis with gene editing strategies that use known targets as well as identifying alternative targets will be possible by better understanding natural genetic variation in apomictic species. With the growing availability of genomic data and precise gene editing tools, we are making substantial progress towards engineering apomictic crops. Open-Access-Publikationsfonds 2020 peerReviewed

Fil: Karunarathne, Piyal. University of Goettingen. Albrecht-von-Haller Institute for Plant Sciences. Department of Systematics, Biodiversity and Evolution of Plants; Alemania. Fil: Reutemann, Anna V. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina. Fil: Schedler, Mara. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina. Fil: Martínez, Eric J. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina. Fil: Honfi, Ana Isabel. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina. Fil: Honfi, Ana Isabel. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Instituto de Biología Subtropical; Argentina. Fil: Honfi, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical. Programa de Estudios Florísticos y Genética Vegeta; Argentina. Fil: Hojsgaard, Diego H. University of Goettingen. Albrecht-von-Haller Institute for Plant Sciences. Department of Systematics, Biodiversity and Evolution of Plants; Alemania. In systems alternating between sexual and asexual reproduction, sex increases under unfavorable environmental conditions. In plants producing sexual and asexual (apomictic) seeds, studies on the influence of environmental factors on sex are equivocal. We used Paspalum intermedium to study environmental effects on the expression of sexual and apomictic developments, and on resulting reproductive fitness variables. Flow cytometric and embryological analyses were performed to characterize ploidy and reproductive modes, and effects of local climatic conditions on sexual and apomictic ovule and seed frequencies were determined. Seed set and germination data were collected and used to estimate reproductive fitness. Frequencies of sexual and apomictic ovules and seeds were highly variable within and among populations. Apomictic development exhibited higher competitive ability but lower overall fitness. Frequencies of sexual reproduction in facultative apomictic plants increased at lower temperatures and wider mean diurnal temperature ranges. We identified a two-fold higher fitness advantage of sexuality and a Tug of War between factors intrinsic to apomixis and environmental stressors promoting sexuality which influence the distribution of sex in apomictic populations. This points toward a crucial role of local ecological conditions in promoting a reshuffling of genetic variability that may be shaping the adaptative landscape in apomictic P. intermedium plants.

In systems alternating between sexual and asexual reproduction, sex increases under unfavorable environmental conditions. In plants producing sexual and asexual (apomictic) seeds, studies on the influence of environmental factors on sex are equivocal. We used Paspalum intermedium to study environmental effects on the expression of sexual and apomictic developments, and on resulting reproductive fitness variables. Flow cytometric and embryological analyses were performed to characterize ploidy and reproductive modes, and effects of local climatic conditions on sexual and apomictic ovule and seed frequencies were determined. Seed set and germination data were collected and used to estimate reproductive fitness. Frequencies of sexual and apomictic ovules and seeds were highly variable within and among populations. Apomictic development exhibited higher competitive ability but lower overall fitness. Frequencies of sexual reproduction in facultative apomictic plants increased at lower temperatures and wider mean diurnal temperature ranges. We identified a twofold higher fitness advantage of sexuality and a Tug of War between factors intrinsic to apomixis and environmental stressors promoting sexuality which influence the distribution of sex in apomictic populations. This points toward a crucial role of local ecological conditions in promoting a reshuffling of genetic variability that may be shaping the adaptative landscape in apomictic P. intermedium plants. Fil: Karunarathne, Piyal. Universität Göttingen; Alemania Fil: Reutemann, Anna Verena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Schedler, Mara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Glücksberg, Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Honfi, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Hojsgaard, Diego Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina. Universität Göttingen; Alemania

In systems alternating between sexual and asexual reproduction, sex increases under unfavorable environmental conditions. In plants producing sexual and asexual (apomictic) seeds, studies on the influence of environmental factors on sex are equivocal. We used Paspalum intermedium to study environmental effects on the expression of sexual and apomictic developments, and on resulting reproductive fitness variables. Flow cytometric and embryological analyses were performed to characterize ploidy and reproductive modes, and effects of local climatic conditions on sexual and apomictic ovule and seed frequencies were determined. Seed set and germination data were collected and used to estimate reproductive fitness. Frequencies of sexual and apomictic ovules and seeds were highly variable within and among populations. Apomictic development exhibited higher competitive ability but lower overall fitness. Frequencies of sexual reproduction in facultative apomictic plants increased at lower temperatures and wider mean diurnal temperature ranges. We identified a twofold higher fitness advantage of sexuality and a Tug of War between factors intrinsic to apomixis and environmental stressors promoting sexuality which influence the distribution of sex in apomictic populations. This points toward a crucial role of local ecological conditions in promoting a reshuffling of genetic variability that may be shaping the adaptative landscape in apomictic P. intermedium plants. Fil: Karunarathne, Piyal. Universität Göttingen; Alemania Fil: Reutemann, Anna Verena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Schedler, Mara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Honfi, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Hojsgaard, Diego Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina. Universität Göttingen; Alemania

In systems alternating between sexual and asexual reproduction, sex increases under unfavorable environmental conditions. In plants producing sexual and asexual (apomictic) seeds, studies on the influence of environmental factors on sex are equivocal. We used Paspalum intermedium to study environmental effects on the expression of sexual and apomictic developments, and on resulting reproductive fitness variables. Flow cytometric and embryological analyses were performed to characterize ploidy and reproductive modes, and effects of local climatic conditions on sexual and apomictic ovule and seed frequencies were determined. Seed set and germination data were collected and used to estimate reproductive fitness. Frequencies of sexual and apomictic ovules and seeds were highly variable within and among populations. Apomictic development exhibited higher competitive ability but lower overall fitness. Frequencies of sexual reproduction in facultative apomictic plants increased at lower temperatures and wider mean diurnal temperature ranges. We identified a two-fold higher fitness advantage of sexuality and a Tug of War between factors intrinsic to apomixis and environmental stressors promoting sexuality which influence the distribution of sex in apomictic populations. This points toward a crucial role of local ecological conditions in promoting a reshuffling of genetic variability that may be shaping the adaptative landscape in apomictic P. intermedium plants. Open-Access-Publikationsfonds 2020 peerReviewed

Projections indicate that current plant breeding approaches will be unable to incorporate the global crop yields needed to deliver global food security. Apomixis is a disruptive innovation by which a plant produces clonal seeds capturing heterosis and gene combinations of elite phenotypes. Introducing apomixis into hybrid cultivars is a game-changing development in the current plant breeding paradigm that will accelerate the generation of high-yield cultivars. However, apomixis is a developmentally complex and genetically multifaceted trait. The central problem behind current constraints to apomixis breeding is that the genomic configuration and molecular mechanism that initiate apomixis and guide the formation of a clonal seed are still unknown. Today, not a single explanation about the origin of apomixis o er full empirical coverage, and synthesizing apomixis by manipulating individual genes has failed or produced little success. Overall evidence suggests apomixis arise from a still unknown single event molecular mechanism with multigenic e ects. Disentangling the genomic basis and complex genetics behind the emergence of apomixis in plants will require the use of novel experimental approaches benefiting from Next Generation Sequencing technologies and targeting not only reproductive genes, but also the epigenetic and genomic configurations associated with reproductive phenotypes in homoploid sexual and apomictic carriers. A comprehensive picture of most regulatory changes guiding apomixis emergence will be central for successfully installing apomixis into the target species by exploiting genetic modification techniques. Open-Access-Publikationsfonds 2020 peerReviewed

With ever-rising demand for food, forage breeding for intensification of cattle production is also taking a leap. In South America, cattle production systems are displaced to marginal areas poorly exploited with cultivated pastures yet with high potential for growing stocking rates. This places the need for using native genetic resources to breed locally adapted plant genotypes that benefits from better forage quality, yield, and lesser threat to the local biodiversity. Paspalum modestum Mez is a grass species that produces quality forage and grows in marginal areas like estuaries and floodplains, suitable for introduction in breeding programs. In this study we characterize the species' reproductive biology and ecological preferences needed beforehand any improvement. P. modestum plants found in nature are commonly diploids, rarely triploids, and tetraploids. Chromosome associations during meiosis in polyploids indicate they are autopolyploids. While diploids are sexual self-sterile, analyses of embryology, gamete fertility and experimental crossings show tetraploids are self-compatible facultative apomicts, highly fertile and have a high proportion of sexuality compared to other apomictic species. Ecological niche analysis and species distribution modelling show mean annual temperature and precipitation as main ecological drivers and a wide geographical area of climatic suitability where P. modestum can grow and be exploited as a forage grass. Our study points to P. modestum as a native plant resource appropriate for breeding waterlogging tolerant ecotypes and genotypes of high biomass production adapted to low flow areas in the Subtropics of Brazil, Paraguay, Uruguay and Argentina.

Model of mutation elimination under constant recombination rate and selection on female gametophytes. The graph visualizes the model for the first generations. (DOCX 264 kb)

Background In the absence of sex and recombination, genomes are expected to accumulate deleterious mutations via an irreversible process known as Muller’s ratchet, especially in the case of polyploidy. In contrast, no genome-wide mutation accumulation was detected in a transcriptome of facultative apomictic, hexaploid plants of the Ranunculus auricomus complex. We hypothesize that mutations cannot accumulate in flowering plants with facultative sexuality because sexual and asexual development concurrently occurs within the same generation. We assume a strong effect of purging selection on reduced gametophytes in the sexual developmental pathway because previously masked recessive deleterious mutations would be exposed to selection. Results We test this hypothesis by modeling mutation elimination using apomictic hexaploid plants of the R. auricomus complex. To estimate mean recombination rates, the mean number of recombinants per generation was calculated by genotyping three F1 progeny arrays with six microsatellite markers and character incompatibility analyses. We estimated the strength of purging selection in gametophytes by calculating abortion rates of sexual versus apomictic development at the female gametophyte, seed and offspring stage. Accordingly, we applied three selection coefficients by considering effects of purging selection against mutations on (1) male and female gametophytes in the sexual pathway (additive, s = 1.000), (2) female gametophytes only (s = 0.520), and (3) on adult plants only (sporophytes, s = 0.212). We implemented recombination rates into a mathematical model considering the three different selection coefficients, and a genomic mutation rate calculated from genome size of our plants and plant-specific mutation rates. We revealed a mean of 6.05% recombinants per generation. This recombination rate eliminates mutations after 138, 204 or 246 generations, depending on the respective selection coefficients (s = 1.000, 0.520, and 0.212). Conclusions Our results confirm that the empirically observed frequencies of facultative recombination suffice to prevent accumulation of deleterious mutations via Muller’s ratchet even in a polyploid genome. The efficiency of selection is in flowering plants strongly increased by acting on the haplontic (reduced) gametophyte stage. Open-Access-Publikationsfonds 2019

Graphical representation of results of the three character incompatibility methods for identification of recombinants. The graphs visualize results of calculations. (DOCX 249 kb)

Made available in DSpace on 2020-12-11T01:57:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-10-29 Griffith University Gowonda HPC Cluster Queensland Cyber Infrastructure Foundation Document recommendation systems for locating relevant literature have mostly relied on methods developed a decade ago. This is largely due to the lack of a large offline gold-standard benchmark of relevant documents that cover a variety of research fields such that newly developed literature search techniques can be compared, improved and translated into practice. To overcome this bottleneck, we have established the RElevant LIterature SearcH consortium consisting of more than 1500 scientists from 84 countries, who have collectively annotated the relevance of over 180 000 PubMed-listed articles with regard to their respective seed (input) article/s. The majority of annotations were contributed by highly experienced, original authors of the seed articles. The collected data cover 76% of all unique PubMed Medical Subject Headings descriptors. No systematic biases were observed across different experience levels, research fields or time spent on annotations. More importantly, annotations of the same document pairs contributed by different scientists were highly concordant. We further show that the three representative baseline methods used to generate recommended articles for evaluation (Okapi Best Matching 25, Term Frequency-Inverse Document Frequency and PubMed Related Articles) had similar overall performances. Additionally, we found that these methods each tend to produce distinct collections of recommended articles, suggesting that a hybrid method may be required to completely capture all relevant articles. The established database server located at https://relishdb.ict.griffith.edu.au is freely available for the downloading of annotation data and the blind testing of new methods. We expect that this benchmark will be useful for stimulating the development of new powerful techniques for title and title/abstract-based search engines for relevant articles in biomedical research. Griffith Univ, Sch Informat & Commun Technol, Gold Coast, Qld 4222, Australia Griffith Univ, Inst Glyc, Gold Coast, Qld 4222, Australia Univ Colorado, Dept Med Med Oncol, Anschutz Med Campus, Denver, CO USA Tanta Univ, Fac Sci, Bot Dept, Tanta, Egypt Friedrich Schiller Univ, Jena Univ Hosp, Inst Human Genet, Jena, Germany Univ Med Ctr Schleswig Holstein, Dept Radiat Oncol, Campus Kiel, Kiel, Germany ARS, USDA, Plum Isl Anim Dis Ctr, Greenport, NY 11944 USA Univ Jyvaskyla, Dept Biol & Environm Sci, Jyvaskyla, Finland Graz Univ Technol, Inst Environm Biotechnol, Graz, Austria CSIC, CNB, Natl Biotechnol Ctr, Dept Macromol Struct, Madrid, Spain Univ Hong Kong, Fac Dent, Oral & Maxillofacial Radiol Appl Oral Sci & Commu, Hong Kong, Peoples R China Univ Kansas, Div Entomol, Biodivers Inst, Lawrence, KS 66045 USA SUNY Albany, RNA Inst, Albany, NY 12222 USA Robert Koch Inst, Dept Methods Dev & Res Infrastruct, Berlin, Germany Martin Luther Univ Halle Wittenberg, Dept Surg & Conservat Pediat & 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Toulouse, France ASCR, Inst Mol Genet, CZ Openscreen, Prague, Czech Republic Univ Turku, Inst Biomed, Turku, Finland York Univ, Sch Kinesiol & Hlth Sci, Toronto, ON, Canada Univ Calif Los Angeles, Stein Eye Inst, Ophthalmol, Los Angeles, CA USA Agr & Agri Food Canada, Ottawa Res & Dev Ctr, Ottawa, ON, Canada Helmholtz Zentrum Geesthacht, Mat Design & Characterizat, Geesthacht, Germany Unvers Genova, Internal Med, Genoa, Italy Otto von Guericke Univ, Intelligent Catheter INKS, Magdeburg, Germany Univ Toledo, Canc Biol, 2801 W Bancroft St,Hlth Sci Campus, Toledo, OH 43606 USA CRUK Beatson Inst, Struct Biol, Glasgow, Lanark, Scotland Leibniz Inst Primate Res, Med RNA Biol, Gottingen, Germany Univ Limoges, PEIRENE, EA 7500, Limoges, France Hainan Univ, Vet Med, Haikou, Hainan, Peoples R China UCL, Sch Pharam, Pharmacognosy & Phytotherapy, London, England Univ Oulu, Ecol & Genet Res Unit, Oulu, Finland Rhein Westfal TH Aachen, Inst Biochem & Mol Immunol, Aachen, Germany Univ Stuttgart, Inst Biochem & Tech Biochem, Stuttgart, Germany Peking Univ, Shenzhen Grad Sch, Sch Chem Biol & Biotechnol, Shenzhen, Peoples R China GIGA Res Inst, Med Oncol, Liege, Belgium CHULiege, Liege, Belgium Fdn Bruno Kessler, MPBA, Trento, Italy Hokkaido Univ, Grad Sch Med, Dept Neurobiol, Sapporo, Hokkaido, Japan Univ Leuven, Oncol, Leuven, Belgium Chalmers Univ Technol, Dept Math Sci, Gothenburg, Sweden Radboud Univ Nijmegen, Med Ctr, Dept Neurol, Nijmegen, Netherlands Univ South Australia, Sch Informat Technol & Math Sci, Adelaide, SA, Australia Bio Thera Solut Ltd, Dept Computat Biol, Guangzhou, Guangdong, Peoples R China Inst Invest Biosanitario Granada IBS, Otolaryngol, Granada, Spain Curtin Univ, Sch Mol & Life Sci, Perth, WA, Australia Newcastle Univ, Inst Cellular Med, Newcastle Upon Tyne, Tyne & Wear, England Goethe Univ, Biol DCAL, Inst Pharm, Frankfurt, Germany Univ Lyon, ICBMS, UMR 5246, Lyon, France Inst Pasteur, Dept Genomes & Genet, Paris, France Univ Valencia, Pharmacol, Valencia, Spain Council Agr Res & Econ, Res Ctr Olive Citrus & Tree Fruit, Caserta, Italy Fraunhofer Inst Toxicol & Expt Med ITEM, Preclin Pharmacol & Vitro Toxicol, Hannover, Germany Univ Tasmania, Sch Med, Hobart, Tas, Australia Chugai Pharmaceut Co Ltd, Oncol Lifecycle Management Dept, Tokyo, Japan Univ Lubeck, Inst Neurobiol, Lubeck, Germany NYU, Sch Med, Neurol, New York, NY USA Univ Putra Malaysia, Dept Plant Pathol, Seri Kembangan, Malaysia Univ N Carolina, Biol, Chapel Hill, NC 27515 USA Univ Southampton, Fac Hlth Sci, Southampton, Hants, England Univ Highlands & Islands, Genet & Immunol Res Grp, Inverness, Scotland Heidelberg Univ, Inst Pathol, Heidelberg, Germany Indraprastha Inst Informat Technol, Dept Computat Biol, New Delhi, India Glasgow Caledonian Univ, Sch Hlth & Life Sci, Glasgow, Lanark, Scotland Liverpool John Moores Univ, Pharm & Biomol Sci, Liverpool, Merseyside, England Parkinsons Inst & Clin Ctr, Basic Res, Sunnyvale, CA USA Luxembourg Inst Sci & Technol, Environm Res & Innovat, Luxembourg, Luxembourg Univ Wollongong, Sch Comp & Informat Technol, Wollongong, NSW, Australia Univ Bari Aldo Moro, Dept Biomed Sci & Human Oncol, Bari, Italy Flinders Univ S Australia, Coll Nursing & Hlth Sci, Adelaide, SA, Australia Univ S Florida, Mol Med, Tampa, FL USA Univ Texas Dallas, Behav & Brain Sci, Richardson, TX 75083 USA Rhodes Univ, Zool & Entomol, Grahamstown, South Africa Univ Nova Lisboa, Inst Higiene & Med Trop, Lisbon, Portugal Swiss Fed Inst Technol, Inst Microbiol, Zurich, Switzerland Inst Ulm, German Red Cross Blood Serv, Immunohaematol, Ulm, Germany Tokyo Womens Med Univ, Inst Adv Biomed Engn & Sci, Tokyo, Japan Univ Limerick, Biol Sci, Limerick, Ireland McGill Univ, Dept Anim Sci, Montreal, PQ, Canada StatSol, Lubeck, Germany Univ KwaZulu Natal, Sch Math Stat & Comp Sci, Pietermaritzburg, South Africa Univ Kebangsaan Malaysia, Inst Syst Biol INBIOSIS, Bangi, Malaysia NIH, Natl Ctr Complementary & Integrat Hlth, Bldg 10, Bethesda, MD 20892 USA Univ Kansas, Med Ctr, Family Med Res Div, Kansas City, KS 66103 USA ASTAR, Inst Mol & Cell Biol, Multimodal Mol Biol, Singapore, Singapore Univ Leuven, Dept Chron Dis Metab & Ageing, Leuven, Belgium Int Iberian Nanotechnol Lab INL, Braga, Portugal Anglia Ruskin, Comp & Technol, Cambridge, England Max Planck Inst Biochem, Struct Cell Biol, Planegg, Germany Univ Seville, Dept Comp Architecture & Technol, Seville, Spain Univ Colorado, EBIO, Boulder, CO 80309 USA Univ Manchester, Canc Sci, Manchester, Lancs, England Australian Natl Univ, Res Sch Populat Hlth, Canberra, ACT, Australia Singapore MIT Alliance Res & Technol, Biosyst, Singapore, Singapore Australian Catholic Univ, Mary MacKillop Inst Hlth Res, Musculoskeletal Hlth & Ageing Res Program, Melbourne, Vic, Australia Ruhr Univ Bochum, Gen Surg, St Josef Hosp, Bochum, Germany Northwest A&F Univ, Coll Life Sci, Xianyang, Shaanxi, Peoples R China Australian Natl Univ, Res Sch Biol, Div Plant Sci, Canberra, ACT, Australia Battelle Mem Inst, Clin & Nonclin Res, Columbus, OH USA Southern Methodist Univ, Biol Sci, Dallas, TX 75275 USA Teikyo Univ, Inst Med Mycol, Tokyo, Japan Tempus Labs, Bioinformat, Chicago, IL USA Hunan Univ, Coll Biol, Changsha, Hunan, Peoples R China Inst Cochin, Dept Infect Immun & Inflammat, Paris, France Royal Coll Surgeons Ireland, FutureNeuro Res Ctr Physiol & Med Phys, Dublin, Ireland Univ Jyvaskyla, Gerontol Res Ctr, Jyvaskyla, Finland Heidelberg Univ, Dept Anesthesiol, Heidelberg, Germany Penn State Univ, Biol, University Pk, PA 16802 USA Chinese Acad Sci, Inst Microbiol, State Key Lab Microbial Resources, Beijing, Peoples R China Univ Sci & Technol China, Sch Life Sci, Hefei, Anhui, Peoples R China Michigan State Univ, Anim Sci, E Lansing, MI 48824 USA SUNY Buffalo, Jacobs Sch Med & Biomed Sci, Dept Neurol, Buffalo Neuroimaging Anal Ctr, New York, NY USA Univ Rostock, Inst Biol Sci, Rostock, Germany South China Normal Univ, Sch Environm, Environm Res Inst, Guangzhou, Guangdong, Peoples R China Univ Bari, Dept Vet Med, Bari, Italy Radboud Univ Nijmegen, Med Ctr, Primary & Community Care, Nijmegen, Netherlands EcoHlth Alliance, New York, NY USA Mayo Clin, Cardiovasc Dept, Rochester, MN USA Med Univ Silesia, Sch Med Katowice, Dept Epidemiol, Katowice, Poland Univ Lleida, Anim Sci, Lleida, Spain Univ Florida, Coll Pharm, Pharmaceut Outcomes & Policy, Gainesville, FL USA Pacific Northwest Natl Lab, Earth & Biol Sci Directorate, Richland, WA 99352 USA Univ Edinburgh, Ctr Discovery Brain Sci, Edinburgh, Midlothian, Scotland Harvard Med Sch, Dept Biomed Informat, Boston, MA 02115 USA Univ Penn, Radiol, Philadelphia, PA 19104 USA Humanitas Univ & Res Hosp, Asthma & Allergy Unit, Biomed Sci Personalized Med, Rozzano, Italy Australian Natl Univ, Dept Quantum Sci, Canberra, ACT, Australia Carl von Ossietzky Univ Oldenburg, Ecol Genom, Oldenburg, Germany Int Med Univ, Paediat Dent & Orthodont, Kuala Lumpur, Malaysia Univ Ottawa, Sch Nursing, Ottawa, ON, Canada Maastricht Univ, Dept Educ Support, Maastricht, Netherlands Univ Manchester, Math, Manchester, Lancs, England Kings Coll London, Fac Life Sci & Med, Sch Populat Hlth Sci, London, England Queensland Univ Technol, Inst Hlth & Biomed Innovat, Brisbane, Qld, Australia Harbin Med Univ, Publ Hlth Sch, Epidemiol, Harbin, Heilongjiang, Peoples R China UiT Arctic Univ Norway, Dept Chem, Tromso, Norway Cornell Univ, Biol Stat & Computat Biol, Ithaca, NY USA East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai, Peoples R China Johannes Gutenberg Univ Mainz, Fac Biol, Mainz, Germany Univ Massachusetts, Food Sci, Amherst, MA 01003 USA Max Planck Inst Terr Microbiol, Complex Adapt Traits Res Grp, Marburg, Germany NIHR Biomed Res Ctr Resp, Ctr Exercise & Rehabil Sci, Leicester, Leics, England Yale Univ, Dept Internal Med, Sect Endocrinol, New Haven, CT USA Sardar Patel Univ, Dept Biosci, Anand, Gujarat, India Univ Tokyo, Dept Appl Phys, Tokyo, Japan Univ Cologne, Vivo Res Facil ivRF, Cologne Excellence Cluster Cellular Stress Respon, Cologne, Germany Natl Open Univ Nigeria, Dept Publ Hlth Sci, Lagos, Nigeria Univ Hosp Regensburg, Dept Radiol, Regensburg, Germany Natl Univ Singapore, Geog, Singapore, Singapore Alfaisal Univ, Coll Med, Riyadh, Saudi Arabia Abdelmalek Essaadi Univ, Fac Sci & Techn Tangier, Biomed Genom & Oncogenet Res Lab, Tetouan, Morocco Tech Univ Munich, Fac Sport & Hlth Sci, Exercise Biol Grp, Munich, Germany Univ Santiago de Compostela, Dept Psicoloxia Social Basica & Metodoloxia, Galiza, Spain Griffith Univ, Signal Proc Lab, Brisbane, Qld, Australia Univ Ghent, Dept Neurol, Ghent, Belgium Ghent Univ Hosp, Ghent, Belgium Univ Ghent, Fac Vet Med, Merelbeke, Belgium Albert Einstein Coll Med, Inst Clin & Translat Res, New York, NY USA Anglia Ruskin Univ, Fac Med Sci, Cambridge, England Peking Univ, Coll Chem & Mol Engn, Beijing, Peoples R China Herlev & Gentofte Hosp, Dept Dermatol & Allergy, Hellerup, Denmark Lady Cilento Childrens Hosp, Med Imaging & Nucl Med, Brisbane, Qld, Australia Univ Gambia, Sch Med & Allied Hlth Sci, Nursing & Reprod Hlth, Brikama, Gambia Univ Sydney, Woolcock Inst Med Res, Sydney, NSW, Australia Wayne State Univ, Comp Sci, Detroit, MI USA Aberdeen Royal Infirm, Otolaryngol, Aberdeen, Scotland Univ Toronto, Lab Med & Pathobiol, Toronto, ON, Canada Chinese Univ Hong Kong, Inst Ageing, Hong Kong, Peoples R China Univ Nebraska Med Ctr, Emergency Med, Omaha, NE USA Univ Florida, Coll Med, Pathol, Gainesville, FL USA Univ Texas MD Anderson Canc Ctr, Radiat Oncol, Houston, TX 77030 USA Univ Pisa, Translat Res NTMS, Pisa, Italy Magna Grecia Univ, Clin & Expt Med, Catanzaro, Italy Univ Vermont, Larner Coll Med, Pediat, Burlington, VT USA Sun Yat Sen Univ, Canc Ctr, Diagnost & Intervent Ultrasound, Guangzhou, Guangdong, Peoples R China Fudan Univ, Inst Brain Sci, Shanghai, Peoples R China Shanxi Agr Univ, Coll Agron, Jinzhong, Shanxi, Peoples R China Univ Toronto, Inst Med Sci, Toronto, ON, Canada Univ Adelaide, ARCPOH, Adelaide, SA, Australia Pelita Harapan Univ, Fac Med, Cardiol & Vasc Med, Tangerang, Indonesia Inst Mental Hlth, Res Div, Singapore, Singapore UCL, MRC Clin Trials Unit, London, England Univ Padua, Dept Philosophy Sociol Educ & Appl Psychol FISPPA, Padua, Italy Univ Lubeck, Dept Psychiat & Psychotherapy, Lubeck, Germany Dalian Univ Technol, Ctr Mol Med, Dalian, Liaoning, Peoples R China Tianjin United Family Healthcare, Reprod Med, Tianjin, Peoples R China Univ Autonoma Barcelona, Dept Engn Quim Biol & Ambiental, Barcelona, Spain Sao Paulo State Univ UNESP, Dept Anim Sci, Sao Paulo, Brazil Helmholtz Zentrum Munchen, Inst Computat Biol, Canc Syst Biol, Ingolstadter Land Str 1, D-85764 Munich, Germany Univ Tokyo, Dept Cardiovasc Med, Tokyo, Japan Sao Paulo State Univ, Vet Clin, Sao Paulo, Brazil Zhejiang Univ, Inst Biotechnol, Hangzhou, Zhejiang, Peoples R China Aarhus Univ, Dept Mol Biol & Genet, Aarhus, Denmark Univ Manchester, St Marys Hosp, Maternal & Fetal Hlth, Manchester, Lancs, England Univ New Mexico, Internal Med, Albuquerque, NM 87131 USA Mayo Clin, Div Biomed Stat & Informat, Jacksonville, FL 32224 USA King Saud Univ, Plant Prod, Riyadh, Saudi Arabia Polish Acad Sci, Inst Genet & Anim Breeding, Dept Mol Biol, Warsaw, Poland Queensland Univ Technol, Optometry & Vis Sci, Brisbane, Qld, Australia Univ Nottingham, Sch Life Sci, Nottingham, England Canc Council Queensland, Canc Res Ctr, Brisbane, Qld, Australia Umea Univ, Dept Chem, Umea, Sweden Publ Hlth England, Ctr Radiat Chem & Environm Hazards, Bristol, Avon, England Univ Campania L Vanvitelli, DISTABIF, Caserta, Italy Bartshealth, Obstet & Gyanecol, London, England Univ Clermont Auvergne, GReD Lab, Clermont Ferrand, France INRA Abeilles & Environm, Avignon, France Queensland Univ Technol, Sch Publ Hlth & Social Work, Brisbane, Qld, Australia Univ Penn, Psychiat, Philadelphia, PA 19104 USA Novosibirsk State Univ, Res Inst Physiol & Basic Med, Novosibirsk, Russia UCL, Dept Chem, London, England La Trobe Univ, Anim Plant & Soil Sci, Melbourne, Vic, Australia Univ Arizona, Epidemiol & Biostat, Tucson, AZ USA Univ Groningen, Univ Med Ctr Groningen, ERIBA, Groningen, Netherlands Univ Gothenburg, Inst Clin Sci, Dept Radiat Phys, Gothenburg, Sweden SUNY Upstate Med Univ, Biochem & Mol Biol, Syracuse, NY 13210 USA Fundacao Oswaldo Cruz, Ctr Pesquisas Goncalo Moniz, Salvador, Bahia, Brazil Inst Environm Sci & Res ESR, Food Water & Environm Microbiol, Christchurch, New Zealand Univ Otago, Food Sci, Dunedin, New Zealand Florida Atlantic Univ, Biomed Sci, Boca Raton, FL 33431 USA Univ Queensland, Inst Mol Biosci, Brisbane, Qld, Australia Univ Hosp Wurzburg, Inst Clin Neurobiol, Wurzburg, Germany Inst Trop Med, Publ Hlth, Antwerp, Belgium Univ Thessaly, Sch Hlth Sci, Fac Med, Dept Rheumatol & Clin Immunol, Larisa, Greece Univ Basel, UZB Univ Ctr Dent Med, Dept Orthodont & Pediat Dent, Basel, Switzerland Sorbonne Univ, Museum Natl Hist Nat, Inst Systemat Evolut Biodiversite ISYEB, MNHN,CNRS,UMR 7205,EPHE, Paris, France CNRS, Inst Adv Biosci, Paris, France Univ Western Australia, Sch Mol Sci, Perth, WA, Australia Univ Ft Hare, Biochem & Microbiol, Alice, South Africa Univ Tubingen, Phys, Tubingen, Germany Griffith Univ, Sch Environm & Sci, Brisbane, Qld, Australia Philosoph Theol Hsch Vallendar, Stat & Standardised Methods, Vallendar, Germany Imperial Coll London, Life Sci, London, England Univ Adelaide, Adelaide Med Sch, Adelaide, SA, Australia Univ Nebraska Med Ctr, Dept Pharmacol & Expt Neurosci, Omaha, NE USA Technol Univ Dublin, FOCAS Res Inst, Dublin, Ireland INSERM, Natl Inst Hlth & Med Res, Canc Res Ctr Toulouse, Paris, France Univ Santiago de Compostela, Dept Bioloxia Func, Grp BRAINSHARK, Galiza, Spain Univ Nebraska, Biol, Kearney, NE USA Univ Autonoma Barcelona, Dept Genet & Microbiol, Barcelona, Spain Univ Pisa, Chem & Ind Chem, Pisa, Italy Univ Manchester, Wellcome Trust Ctr Cell Matrix Res, Manchester, Lancs, England Univ Montpellier, CNRS, Inst Human Genet, Montpellier, France Czech Acad Sci, Inst Organ Chem & Biochem, Prague, Czech Republic CSIC, Natl Ctr Biotechnol CNB, Computat Syst Biol Grp, Madrid, Spain Natl Cheng Kung Univ, Dept Biochem & Mol Biol, Tainan, Taiwan Harvard Med Sch, Schepens Eye Res Inst, Ophthalmol, Boston, MA 02115 USA Lanzhou Univ, Hosp 2, Dept Gen Surg, Lanzhou, Gansu, Peoples R China Univ Technol Sydney, Sch Life Sci, Sydney, NSW, Australia JT Chen Clin, Gynecol, Tokyo, Japan Univ Western Australia, Sch Agr & Environm, Perth, WA, Australia Beijing Normal Univ, Fac Geog Sci, Beijing, Peoples R China Univ Missouri, Elect Engn & Comp Sci, Columbia, MO USA Vrije Univ Amsterdam Med Ctr, Amsterdam Publ Hlth Res Inst, Dept Publ & Occupat Hlth, Amsterdam, Netherlands Semmelweis Univ, Med Biochem, Budapest, Hungary Queen Elizabeth Hosp, Dept Clin Oncol, Hong Kong, Peoples R China Univ Pittsburgh, Chem, Pittsburgh, PA USA GB Pant Inst Post Grad Med Educ & Res, Neurol, New Delhi, India Univ Copenhagen, Vet & Anim Sci, Copenhagen, Denmark Univ Palermo, Biomed Dept Internal & Specialist Med DIBIMIS, Sect Endocrinol, Palermo, Italy UCL, NPP, London, England Univ Florida, Microbiol & Cell Sci, Gainesville, FL USA Univ Salford, Sch Hlth Sci, Manchester, Lancs, England Cardiff Univ, Inst Med Genet, Cardiff, S Glam, Wales INSERM, ICO Canc Ctr, Angers, France Univ Colombo, Fac Med, Microbiol, Colombo, Sri Lanka Beijing Univ Chinese Med, Sch Chinese Mat Med, Beijing, Peoples R China Univ Porto, Fac Pharm, Porto, Portugal Univ Nottingham, Div Primary Care, Nottingham, England Univ Illinois, Pharm Syst Outcomes & Policy, Chicago, IL USA Pontificia Univ Catolica Goias, Escola Ciencias Agr & Biol, Goiania, Go, Brazil China Japan Friendship Hosp, Dept Oncol, Beijing, Peoples R China Boston Univ, Chem, Boston, MA 02215 USA Amer Univ, Environm Sci, Washington, DC 20016 USA Carleton Univ, Neurosci, Ottawa, ON, Canada Univ Regina, Chem & Biochem, Regina, SK, Canada Univ Montreal, Microbiolgy, Montreal, PQ, Canada Univ Leicester, Dept Genet & Genome Biol, Leicester, Leics, England Univ Queensland, Sch Agr & Food Sci, Gatton, Qld, Australia CNRS, BIOM, Paris, France UCL, Hatter Cardiovasc Inst, London, England Flinders Univ S Australia, Sci & Engn, Adelaide, SA, Australia Univ Warwick, Engn, Coventry, W Midlands, England Katholieke Univ Leuven, Ctr Human Genet, Leuven, Belgium Fudan Univ, Dept Macromol Sci, Shanghai, Peoples R China Dokuz Eylul Univ, Biol Educ, Izmir, Turkey Indiana Univ Sch Med, Dept Biochem & Mol Biol, Indianapolis, IN 46202 USA Mondo Med, Pulm Dis, Borgomanero, Italy US Naval, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC USA Univ Oslo, Inst Basic Med Sci, Dept Nutr, Oslo, Norway Peking Univ, Dept Mech & Engn Sci, Beijing, Peoples R China Saarland Univ, Dept Pharm Pharmaceut & Med Chem, Saarbrucken, Germany INSERM, Natl Inst Hlth & Med Res, Skin Res Inst, Paris, France Shanghai Proton & Heavy Ion Ctr, Res & Dev, Shanghai, Peoples R China Univ Georgia, Epidemiol, Athens, GA 30602 USA Univ Freiburg, Med Ctr, Dept Plast & Hand Surg, Freiburg, Germany Sidra Med, Res, Doha, Qatar Rostock Univ, Med Ctr, Dept Oral Maxillofacial & Plast Surg, Rostock, Germany Harvard Med Sch, Brigham & Womens Hosp, Emergency Med, Boston, MA 02115 USA AgResearch, Forage Sci, Palmerston North, New Zealand Univ Calif Los Angeles, Med, Los Angeles, CA USA Arizona State Univ, Biodesign Inst, Virginia G Piper Ctr Personalized Diagnost, Tempe, AZ USA Sheffield Hallam Univ, Res Inst, Mat & Engn, Sheffield, S Yorkshire, England Aneurin Bevan Univ Healthboard, Resp Med, Newport, Shrops, England Univ Calif San Francisco, Neurol Surg, San Francisco, CA 94143 USA Univ Western Australia, UWA Dent Sch, Perth, WA, Australia Fordham Univ, Biol Sci, Bronx, NY 10458 USA Univ Helsinki, Inst Biotechnol, Helsinki, Finland Fujian Normal Univ, Coll Life Sci, Fuzhou, Fujian, Peoples R China Univ Fukui, Dept Frontier Fiber Technol & Sci, Fukui, Japan Univ Southampton, Fac Med, Clin & Expt Sci, Southampton, Hants, England Univ Urbino, Dept Biomol Sci, Urbino, Italy Osped San Luigi, Allergol Unit, Turin, Italy Muljibhai Patel Urol Hosp, Dept Urol, Nadiad, Gujarat, India Univ Granada, Stratig & Paleontol, Granada, Spain Massey Univ, Sch Vet Sci, Auckland, New Zealand CNR, High Performance Comp & Networking Inst, Naples, Italy Univ Childrens Hosp Zurich, Div Metab, Zurich, Switzerland Univ Childrens Hosp Zurich, Childrens Res Ctr, Zurich, Switzerland Univ Melbourne, Biochem & Mol Biol, Parkville, Vic, Australia Inst Pasteur, Leptospirosis Res & Expertise Unit, Noumea, New Caledonia Tsinghua Univ, Sch Life Sci, Beijing, Peoples R China Cheikh Anta Diop Univ UCAD, Sci Fac, Biol Anim Dept, Dakar, Senegal Providence Portland Med Ctr, Earle A Chiles Res Inst, Portland, OR USA Agr & Agri Food Canada, Lacombe Res & Dev Ctr, Lacombe, AB, Canada Alberta Innovates, Performance Management & Evaluat, Edmonton, AB, Canada Univ Malaga, CSIC, Inst Hortofruticultura Subtrop Mediterranea La Ma, IHSM,UMA, Malaga, Spain James Cook Univ, Coll Publ Hlth Med & Vet Sci, Cairns, Qld, Australia European Commiss, Joint Res Ctr, Ispra, Italy Univ Montpellier, Montpellier, France CSIRO, Floreat, WA, Australia Sun Yat Sen Univ, Sun Yat Sen Mem Hosp, Guangzhou, Guangdong, Peoples R China Vanderbilt Univ, Pharmacol, 221 Kirkland Hall, Nashville, TN 37235 USA RIKEN, KFU RIKEN Translat Genom Unit, Yokohama, Kanagawa, Japan Univ Tubingen, Neurobiol Vocal Commun, Tubingen, Germany Univ Colorado, UCCS Ctr Biofrontiers Inst, Colorado Springs, CO 80907 USA Fred Hutchinson Canc Ctr, Div Basic Sci, Seattle, WA USA Univ Geneva, Fac Med, Primary Care Unit, Geneva, Switzerland Ernst Moritz Arndt Univ Greifswald, Dept Mol Genet & Infect Biol, Greifswald, Germany East China Univ Sci & Technol, Dept Fine Chem, Shanghai, Peoples R China Ohio State Univ, Surg, Columbus, OH 43210 USA Oragenics, R&D, Tampa, FL USA Natl Environm Agcy, Environm Hlth Inst, Singapore, Singapore Friedrich Loeffler Inst, Inst Diagnost Virol, Greifswald, Germany Queen Elizabeth Hosp, Oncol, Woodville, SA, Australia USDA, Emerging Pests & Pathogens Res Unit, Ithaca, NY USA Univ Freiburg, Med Ctr, Dept Neurosurg, Epilepsy Ctr, Freiburg, Germany Univ Hong Kong, Fac Educ, Informat & Technol Studies, Hong Kong, Peoples R China Univ Tokyo, Grad Sch Agr & life Sci, Agr & Environm Biol, Tokyo, Japan Univ Pittsburgh, Dept Med, Pittsburgh Heart Lung & Blood Vasc Med Inst, Pittsburgh, PA USA Guys & St Thomas NHS Fdn Trust, Directorate Transplant Renal & Urol, London, England Univ Sarajevo, Clin Ctr, Clin Heart Blood Vessel & Rheumat Dis, Sarajevo, Bosnia & Herceg Univ Kent, Sch Math Stat & Actuarial Sci, Canterbury, Kent, England Tokyo Inst Technol, Dept Life Sci & Technol, Tokyo, Japan Univ Appl Sci Munich, Laser Ctr Dept Appl Sci & Mechatron, Munich, Germany CIC NanoGUNE, Nanodevices, San Sebastian, Spain Vrije Univ Amsterdam Med Ctr, Gynaecol, Amsterdam, Netherlands Cardiff Univ, Med Sch, Div Populat Med, Cardiff, S Glam, Wales Karolinska Inst, Dept Med, Solna, Sweden Natl Inst Genet, Ctr Informat Biol, Mishima, Shizuoka, Japan Murdoch Univ, Harry Perkins Inst Med Res, Perth, WA, Australia Univ Limerick, Phys Educ & Sport Sci, Limerick, Ireland Ruhr Univ Bochum, Campus Clin Gynecol, Univ Str, Bochum, Germany Southwest Med Univ, Sch Publ Hlth, Epidemiol & Biostat, Luzhou, Sichuan, Peoples R China Beijing Canc Hosp, Minist Educ Beijing, Key Lab Carcinogenesis & Translat Res, Ctr Mol Diagnost, Beijing, Peoples R China Chinese Acad Sci, Chengdu Inst Biol, Herpetol Dept, Chengdu, Sichuan, Peoples R China Key Lab Nano Biol Effects & Safety, Beijing, Peoples R China NIBR, PK Sci, Basel, Switzerland Daejeon St Marys Hosp, Pain Ctr, Daejeon, South Korea Univ Western Ontario, Sch Hlth Studies, London, ON, Canada Univ Aberdeen, Hlth Psychol Grp, Aberdeen, Scotland Univ Colorado, Anesthesiol, Anschutz Med Campus, Boulder, CO 80309 USA Univ Antwerp, UZA Antwerp Univ Hosp, Crit Care Med, Edegem, Belgium Aarhus Univ Hosp, Endocrinol, Aarhus, Denmark Univ Pretoria, Ctr Transport Dev, Ind & Syst Engn, Pretoria, South Africa Duke Univ, Dept Biostat & Bioinformat, Durham, NC USA Pontificia Univ Catolica Goias, Med Pharmaceut & Biomed Sci Sch, Goiania, Go, Brazil Karolinska Inst, Danderyd Hosp, Dept Clin Sci, Div Cardiovasc Med, Stockholm, Sweden UCL, Clin Educ & Hlth Psychol, London, England KRIBB, Dev & Differentiat Res Ctr, Daejeon, South Korea Univ dArtois, Lab Barriere Hematoencephal, Arras, France AstraZeneca, IMED Biotech Unit, Discovery Sci, Quantitat Biol, Cambridge, England Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA Coventry Univ, Appl Maths Res Ctr, Stat Phys Grp, Coventry, W Midlands, England Wilton Ctr, Invista Performance Technol, Cleveland, England Thunen Inst Forest Genet, Genome Res, Grosshansdorf, Germany Lebanese Amer Univ, Nat Sci, Byblos, Lebanon Takeda, Evidence & Value Generat, Osaka, Japan King Abdullah Int Med Res Ctr, Stem Cell & Regenerat Med, Riyadh, Saudi Arabia Univ Bahri, Ind Pulp & Paper, Khartoum, Sudan Univ Queensland, Mater Med Res Inst, Mater Res Inst, Brisbane, Qld, Australia Colorado State Univ, NREL, Ft Collins, CO 80523 USA Rzeszow Univ Hosp, Ob Gyn Dept, Rzeszow, Poland Univ Leeds, Fac Biol Sci, Leeds, W Yorkshire, England Massachusetts Gen Hosp, Endocrine Unit, Boston, MA 02114 USA Carl von Ossietzky Univ Oldenburg, Neurosci, Oldenburg, Germany UNSW, St George & Sutherland Clin Sch, Microbiome Res Ctr, Sydney, NSW, Australia NYU, Sch Med, Dept Biochem, New York, NY 10016 USA NYU, Sch Med, Dept Mol Pharmacol, New York, NY USA Univ Mississippi, Med Ctr, Med Infect Dis, Jackson, MS 39216 USA Tampere Univ, Fac Social Sci Psychol, Tampere, Finland Univ Cyprus, Dept Biol Sci, Nicosia, Cyprus Goethe Univ, Inst Med Microbiol & Infect Control, Frankfurt, Germany Charite Med Univ Berlin, Inst Radiol, Berlin, Germany Univ Cologne, Univ Hosp Cologne, Internal Med 1, Cologne, Germany Univ Calif Los Angeles, Sch Dent, Sect Periodont, Los Angeles, CA 90024 USA Aalborg Univ Hosp, Dept Clin Biochem, Aalborg, Denmark Manipal Acad Higher Educ, Pharm Practice, Manipal, Karnataka, India Univ Tokyo, Inst Med Sci, Dept Radiol, Tokyo, Japan Cukurova Univ, Family Med, Fac Med, Adana, Turkey Catholic Univ Korea, Coll Med, Dept Humanities & Social Med, Seoul, South Korea Univ Ghent, Food Technol Safety & Hlth, Ghent, Belgium UNSW Sydney, Sch Biol Earth & Environm Sci BEES, Sydney, NSW, Australia St Vincent Shoulder & Sports Clin, Res Unit, Vienna, Austria Cornell Univ, Biomed Engn, Ithaca, NY USA Leibniz Inst Plant Genet & Crop Plant Res IPK, Res Grp Bioinformat & Informat Technol, Gatersleben, Germany Univ Europea Madrid, Sch Doctoral Studies, Madrid, Spain CSIRO Mfg, Biomed Mfg, Melbourne, Vic, Australia Depaul Univ, Biol Sci, Chicago, IL 60604 USA Konkuk Univ, Dept Anim Sci & Technol, Seoul, South Korea Chang Gung Univ, Grad Inst Med Mechatron, Taoyuan, Taiwan Korea Univ, Coll Med, Psychiat, Seoul, South Korea Princeton Univ, Chem, Princeton, NJ 08544 USA Henan Univ Chinese Med, Henan Key Lab Chinese Med Resp Dis, Zhengzhou, Henan, Peoples R China Univ Med Ctr Mainz, Dept Psychiat & Psychotherapy, Mainz, Germany Monash Univ Malaysia, Sch Sci, Selangor, Malaysia Univ Mississippi, Med Ctr, Physiol & Biophys, Jackson, MS 39216 USA Univ Oslo, Dept Transplantat Med, Oslo, Norway Sichuan Agr Univ, Triticeae Res Inst, Yaan, Sichuan, Peoples R China Guangzhou Univ Chinese Med, Gastroenterol, Guangzhou, Guangdong, Peoples R China Southeast Univ, Sch Biol Sci & Med Engn, Suzhou, Jiangsu, Peoples R China Mt Allison Univ, Biol, Sackville, NB, Canada Ithaca Coll, Biol, Ithaca, NY 14850 USA Univ Cagliari, Dept Med Sci & Publ Hlth, Monserrato, Italy Univ Vienna, Chromosome Biol, Vienna, Austria Univ Zurich, Nephrol, Zurich, Switzerland Friedrich Schiller Univ, Inst Nutr Sci, Jena, Germany UNSW Sydney, Grad Sch Biomed Engn, Sydney, NSW, Australia Tulane Univ, Sch Med, Biochem & Mol Biol, 1430 Tulane Ave, New Orleans, LA 70112 USA NINDS, NIH, Bldg 36,Rm 4D04, Bethesda, MD 20892 USA NIH, NCBI, Natl Lib Med, Bldg 10, Bethesda, MD 20892 USA LOreal Res & Innovat, Aulnay Sous Bois, France Lund Univ, Dept Psychol, Malmo, Sweden Catholic Univ Louvain, Inst Rech Expt & Clin, Brussels, Belgium Georgia State Univ, Neurosci Inst, Atlanta, GA 30303 USA Univ Melbourne, Ophthalmol, Surg, Parkville, Vic, Australia Univ Western Australia, Ctr Ophthalmol & Visual Sci, Perth, WA, Australia Iran Univ Med Sci, Med Phys, Fac Med, Tehran, Iran Salk Inst Biol Studies, Cellular Neurobiol, La Jolla, CA USA Imperial Coll London, Fibrosis Res Grp, London, England Univ Texas MD Anderson Canc Ctr, Genitourinary Med Oncol, Houston, TX 77030 USA Univ Liege, GIGA Neurosci, Liege, Belgium Univ Crete, Sch Med, Urol, Iraklion, Greece Flinders Univ S Australia, Flinders Med Ctr, Dept Clin Pharmacol, Adelaide, SA, Australia Max Planck Inst Immunobiol & Epigenet, Bioinformat, Breisgau, Germany Cardiff Univ, Sch Psychol, Cardiff, S Glam, Wales Imperial Coll London, Chem Engn, London, England Lund Univ, Skane Univ Hosp, Clin Sci, Malmo, Sweden Sahlgrens Acad, Inst Clin Sci, Dept Mol & Clin Med, Gothenburg, Sweden Univ Cent Lancashire, Sch Pharm & Biomed Sci, Preston, Lancs, England Hosp Univ Doctor Peset, Psychiat & Clin Psychol, Valencia, Spain Ctr Biol Mol Severo Ochoa, Genome Dynam & Funct, Madrid, Spain Unvivers Hosp Lille, Dept Intens Care, Lille, France Kansai Med Univ, Surg, Osaka, Japan Univ Toulouse, Inst Natl Polytech Toulouse, Ecole Natl Super Agron Toulouse, Lab Genom & Biotechnol Fruit, Toulouse, France UiT Arctic Univ Norway, Inst Psychol, Tromsto, Norway Queens Univ, Ctr Publ Hlth, Belfast, Antrim, North Ireland Univ Manchester, Ctr Primary Care & Hlth Serv Res, Manchester, Lancs, England Griffith Univ, Menzies Hlth Inst, Gold Coast, Qld, Australia Anglia Ruskin Univ, FHSCE, Cambridge, England Univ Lleida, Dept Expt Med, Lleida, Spain NIEHS, Biomol Screening Branch, Div Natl Toxicol Program, POB 12233, Res Triangle Pk, NC 27709 USA Albany Med Coll, Immunol & Microbial Dis, Albany, NY 12208 USA Univ Queensland, Queensland Brain Inst, Brisbane, Qld, Australia Univ Kent, Sch Biosci, Canterbury, Kent, England Univ Bourgogne Franche Comte, INSERM, LNC, UMR 1231, Besancon, France Ritsumeikan Univ, Coll Life Sci, Dept Biotechnol, Shiga, Japan Kent State Univ, Biol Sci, Kent, OH 44242 USA Natl Inst Infect Dis, Dept Safety Res Blood & Biol Prod, Tokyo, Japan European Inst Marine Studies, Lab Microbiol Extreme Environm, Plouzane, France Univ Iowa, Dept Pharmacol, Roy J & Lucille A Carver Coll Med, Iowa City, IA 52242 USA Natl Univ Singapore, Biol Sci, Singapore, Singapore Conservatoire Natl Arts & Metiers, Lab GBA, EA4627, Paris, France Univ Michigan, Dept Human Genet, Ann Arbor, MI 48109 USA Lomonosov Moscow State Univ, Belozersky Inst Physicochem Biol, Moscow, Russia Jikei Univ, Sch Med, Dept Mol Biol, Tokyo, Japan Univ South Wales, Genom & Computat Biol, Treforest, Wales Duke Univ, Med Ctr, Obstet & Gynecol, Durham, NC USA Univ Technol Sydney, Climate Change Cluster, Sydney, NSW, Australia Nagoya Univ, Grad Sch Med, Dept Radiol, Nagoya, Aichi, Japan Western Sydney Univ, Sch Sci & Hlth, Sydney, NSW, Australia TEI Epirus, Dept Speech & Language Therapy, Ioannina, Greece Indiana Univ Purdue Univ, Orthopaed Surg, Indianapolis, IN 46202 USA Oniris, Vet Pathol, Nantes, France Royal Vet Coll, Pathobiol & Populat Sci, Hatfield, Herts, England Univ Ghent, Lab Pharmaceut Biotechnol, Ghent, Belgium Norwegian Inst Nat Res, Terr Ecol, Trondheim, Norway Univ Calif Merced, Mol & Cell Biol, Merced, CA USA Univ Dublin, Trinity Coll Dublin, Sch Engn, Ctr Transport Res, Dublin, Ireland Lund Univ, Inst Clin Sci, Nephrol, Malmo, Sweden Univ Birmingham, Mech Engn, Birmingham, W Midlands, England Lund Univ, Inst Clin Sci, OB GYN, Lund, Sweden Fdn Jimenez Diaz Hosp, Nephrol & Hypertens, Madrid, Spain Queensland Univ Technol, Sch Chem Phys & Mech Engn, Brisbane, Qld, Australia Otto von Guericke Univ, Psychol, Magdeburg, Germany Univ Med Ctr Gottingen, Dept Expt Neurodegenerat, Gottingen, Germany Harvard Med Sch, Spaulding Rehabil Hosp, Phys Med & Rehabil, Boston, MA 02115 USA Quadram Inst Biosci, Sci Operat, Norwich, Norfolk, England Ostbayer Tech Hsch Regensburg OTH Regensburg, Regensburg Med Image Comp ReMIC, Regensburg, Germany Deakin Univ, Fac Arts & Educ, Melbourne, Vic, Australia Univ Warwick, Warwick Med Sch, Coventry, W Midlands, England INSERM, Natl Inst Hlth & Med Res, Biochem & Mol Biol, Paris, France Univ Liege, Tax Inst, Liege, Belgium Univ Leeds, Sch Mol & Cellular Biol, Leeds, W Yorkshire, England IRCCS Ist Giannina Gaslini, UOC Genet Med, Genoa, Italy Res Diets Inc, Sci, New Brunswick, NJ USA Univ Perugia, Dept Phys & Geol, Perugia, Italy Walter Reed Natl Mil Med Ctr, Cellular Immunol, Bethesda, MD USA Univ Fed Santa Catarina, Biol Sci Ctr, Microbiol Immunol & Parasitol Dept, Florianopolis, SC, Brazil Univ Edinburgh, Royal Infirm, Ctr Liver & Digest Disorders, Edinburgh, Midlothian, Scotland Orion Pharma, Crit Care Proprietary Prod Div, Espoo, Finland MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA Univ Turin, Dept Vet Sci, Turin, Italy Univ G dAnnunzio, Dept Psychol Hlth & Territorial Sci, Chieti, Italy NYU, Sch Med, OB GYN, New York, NY USA Univ Glasgow, Inst Cardiovasc & Med Sci, Glasgow, Lanark, Scotland Univ Turku, Dept Biol, Turku, Finland Tech Univ Berlin, Bioanalyt, Berlin, Germany Univ Goettingen, Inst Phys Biophys 3, Gottingen, Germany Univ Texas MD Anderson Canc Ctr, Inst Appl Canc Sci, Translat Res Adv Therapeut & Innovat Oncol TRACTI, Houston, TX 77030 USA Univ Liege, Life Sci, Liege, Belgium Tarbiat Modares Univ, Fac Med Sci, Dept Toxicol, Tehran, Iran ARS, USDA, Stoneville, MS USA Univ Regensburg, RCI Regensburg Ctr Intervent Immunol, Regensburg, Germany Univ Nottingham, Sch Psychol, Nottingham, England NIH, Pathol Lab, Bethesda, MD 20892 USA Univ Carlos III Madrid, Elect Engn, Madrid, Spain Inst Med Mol, Chem Biol, Lisbon, Portugal Univ Costa Rica, CIET, San Jose, Costa Rica Univ Stavanger, Fac Hlth Sci, Stavanger, Norway Erasmus MC, Urol, Rotterdam, Netherlands Univ Edinburgh, Sch Biol Sci, Edinburgh, Midlothian, Scotland German Res Ctr Environm Hlth GmbH, Helmholtz Zentrum Munchen, Inst Bioinformat & Syst Biol IBIS, Ingolstadter Landstr 1, D-85764 Neuherberg, Germany Leiden Univ, Huygens Kamerlingh Onnes Lab, Leiden, Netherlands Univ Vienna, Nutr Sci, Vienna, Austria Kolling Inst Med Res, Med, St Leonards, NSW, Australia Johns Hopkins Sch Med, Biol Chem, Baltimore, MD USA Univ Montreal, Med Nutr & Microbiome Lab, Montreal, PQ, Canada GlaxoSmithKline, Cell & Gene Therapy, Stevenage, Herts, England Univ Trieste, Life Sci, Trieste, Italy Rhein Westfal TH Aachen, Dept Radiol, Aachen, Germany Univ Duisburg Essen, Univ Hosp Essen, West German Canc Ctr, Dept Med Oncol, Essen, Germany Med Univ Vienna, Obstet & Gynecol, Vienna, Austria FHI 360, Social & Behav Hlth Sci Div, Washington, DC USA KU Leuven VIB, Switch Lab, Leuven, Belgium Bielefeld Univ, Fac Technol, Bielefeld, Germany Capital Med Univ, Beijing Shijitan Hosp, Dept Clin Nutr, Dept Gastrointestinal Surg, Beijing, Peoples R China Meiji Univ, Dept Agr Chem, Kawasaki, Japan Yonsei Univ, Coll Med, Microbiol, Seoul, South Korea Johnson & Johnson EAME, Maidenhead, Berks, England Penn State Coll Med, Pediat, Hershey, PA USA Univ N Carolina, Dept Social Med, Chapel Hill, NC 27515 USA Univ Western Australia, ARC CoE Plant Energy Biol, Perth, WA, Australia Wageningen Univ, Div Human Nutr & Hlth, Wageningen, Netherlands Kings Coll London, Dept Neuroimaging, London, England Univ Murcia, Biochem & Mol Biol, Murcia, Spain Old Dominion Univ, Dept Biol Sci, Norfolk, VA 23529 USA Monash Univ, Biochem & Mol Biol, Melbourne, Vic, Australia Chinese Acad Sci, Inst Genet & Dev Biol, Beijing, Peoples R China Univ Pittsburgh, Pharmacol & Chem Biol, Pittsburgh, PA USA Univ Lausanne, Ctr Integrat Genom, Lausanne, Switzerland Univ Queensland, Sch Pharm, Brisbane, Qld, Australia Leibniz Inst Plant Genet & Crop Plant Res IPK Gat, Genebank, Gatersleben, Germany Piramal Imaging, Res & Dev, Berlin, Germany Univ Leeds, Civil Engn, Leeds, W Yorkshire, England Univ Missouri, Chem & Biochem, St Louis, MO 63121 USA US Geol Survey, Coastal & Marine Geol Program, Pacific Coastal & Marine Sci Ctr, Santa Cruz, CA USA Ajinomoto Genet Res Inst, Moscow, Russia Jagiellonian Univ, Fac Biochem Biophys & Biotechnol, Dept Plant Biotechnol, Krakow, Poland Univ Puerto Rico, Engn Sci & Mat, Mayaguez, PR USA Univ Regina, Dept Chem & Biochem, Regina, SK, Canada Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA Univ Sunshine Coast, Sunshine Coast Mind & Neurosci Thompson Inst, Sippy Downs, Qld, Australia Chinese Peoples Liberat Army Gen Hosp, Dept Gastroenterol & Hepatol, Beijing, Peoples R China Griffith Univ, Griffith Ctr Social & Cultural Res, Gold Coast, Qld, Australia Tohoku Univ, Inst Dev Aging Canc, Dept Mol Oncol, Sendai, Miyagi, Japan Indiana Univ, Comp Sci, Bloomington, IN USA Fukushima Med Univ, Sch Med, Dept Pulm Med, Fukushima, Japan MEDIVIR AB, Biol, Huddinge, Sweden Western Sydney Univ, Neuroimmunol, Sydney, NSW, Australia Univ Jordan, Nutr & Food Technol, Amman, Jordan Thunen Inst Forest Genet, Fed Res Ctr Rura Areas Forestry & Fisheries, Inst Biodivers, Grosshansdorf, Germany Univ Edinburgh, Inst Cell Biol, Edinburgh, Midlothian, Scotland Univ Edinburgh, Ctr Integrat Physiol, Edinburgh, Midlothian, Scotland Univ Toronto, Struct Genom Consortium, Toronto, ON, Canada Canadian Mem Chiropract Coll, Grad Educ & Res, Toronto, ON, Canada Agilent Technol, R&D, Leuven, Belgium Univ British Columbia, Sch Nursing, Vancouver, BC, Canada Monash Univ, Monash Hlth, Sch Clin Sci, Stroke & Ageing Res,Dept Med, Melbourne, Vic, Australia French Natl Canc Inst, Innovat, Transfer, Biol, Boulogne, France Ludwig Maximilians Univ Munchen, Phys Chem, NanoBioSci, Munich, Germany Bandung Inst Technol, Sch Pharm, Med Chem, Bandung, Indonesia Univ Luxembourg, Life Sci Res Unit, Luxembourg, Luxembourg Lund Univ, Skane Univ Hosp, Dept Gastroenterol, Malmo, Sweden Millennium Hlth, Translat Genet, San Diego, CA USA Aristotle Univ Thessaloniki, Med Dept 2, Clin Res & Evidence Based Med Unit, Thessaloniki, Greece Jan Kochanowski Univ Humanities & Sci, Piotrkow Trybunalski Branch, Dept Psychol, Kielce, Poland McMaster Univ, Engn Phys, Hamilton, ON, Canada Marche Polytech Univ, Dept Agr Food & Environm Sci, Ancona, Italy Kuwait Univ, Fac Med, Microbiol, Kuwait, Kuwait Fujita Hlth Univ, Dept Breast Surg, Toyoake, Aich, Japan North West Reg Spinal Injuries Ctr, Spinal Injuries Ctr, Southport, Merseyside, England Luxembourg Inst Hlth, Competence Ctr Methodol & Stat, Luxembourg, Luxembourg Nestle Inst Hlth Sci SA, Metab Hlth, Ecublens, Vaud, Switzerland Ctr Inflammat Res VIB, Ghent, Belgium Univ Ghent, Dept Biomed Mol Biol, Ghent, Belgium Univ Lisbon, Inst Educ, Curriculo Formacao Prof & Tecnol, Lisbon, Portugal Univ Edinburgh, Ctr Inflammat Res, Edinburgh, Midlothian, Scotland Univ Melbourne, Sch BioSci, Parkville, Vic, Australia Northumbria Univ, Comp & Informat Sci, Newcastle Upon Tyne, Tyne & Wear, England Univ Valencia, Endocrinol, Valencia, Spain INRS, Inst Armand Frappier, Laval, PQ, Canada Univ Laval, INAF, Sch Nutr, Quebec City, PQ, Canada Univ Konstanz, Dept Biol, Constance, Germany Univ Cote dAzur, LAMHESS, Nice, France Scion, Syst Ecol, Christchurch, New Zealand CUNY, Grad Sch Publ Hlth & Hlth Policy, Epidemiol & Biostat, New York, NY 10021 USA Univ Queensland, Sch Dent, Brisbane, Qld, Australia George Inst Global Hlth, Renal & Metab Div, Sydney, NSW, Australia Wuhan Univ, Coll Chem & Mol Sci, Wuhan, Hubei, Peoples R China Griffith Univ, Sch Environm & Sci, Gold Coast, Qld, Australia Univ Minnesota, Radiat Oncol, Minneapolis, MN USA Goethe Univ, Fac Med, Frankfurt, Germany 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Tradit Chinese Med, Inst Interdisciplinary Med Sci, Shanghai, Peoples R China McMaster Univ, Biol, Hamilton, ON, Canada Univ S Florida, Dept Cell Biol Microbiol & Mol Biol, Tampa, FL USA Hacettepe Univ, Inst Canc, Med Oncol, Ankara, Turkey City Univ Hong Kong, Dept Elect Engn, Hong Kong, Peoples R China Natl Taiwan Univ, Dept Entomol, Taipei, Taiwan Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Ecol Secur, Beijing, Peoples R China Florida State Univ, Inst Mol Biophys, Chem & Biochem, Tallahassee, FL USA Peking Univ, Shenzhen Grad Sch, State Key Lab Chem Oncogen, Lab Computat Chem & Drug Design, Shenzhen, Peoples R China Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, Helsinki, Finland Tohoku Univ, Microbial Biotechnol, Sendai, Miyagi, Japan Tianjin Med Univ, Sch Basical Med Sci, Dept Pharmacol, Tianjin, Peoples R China Dana Farber Canc Inst, Biostat & Computat Biol, Boston, MA 02115 USA Natl Hlth Res Inst, Inst Mol & Genom Med, Zhunan, Taiwan Univ Oxford, Physiol Anat & Genet, Oxford, England George Washington Univ, Phys, Washington, DC USA Univ Nebraska, Sch Biol Sci, Lincoln, NE USA Toronto Gen Hosp, Res Inst, Dept Lab Med & Pathobiol, Toronto, ON, Canada Univ Texas Dallas, Biol Sci, Richardson, TX 75083 USA NYU, Dept Chem, New York, NY USA Shandong Univ, Sch Math & Stat, Jinan, Shandong, Peoples R China Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei, Anhui, Peoples R China Purdue Univ, Med Chem & Mol Pharmacol, W Lafayette, IN 47907 USA NIBSC, Adv Therapies, Ridge, Herts, England Shanghai Jiao Tong Univ, Ruijin Hosp, Dept Pulm & Crit Care Med, Shanghai, Peoples R China Charite Med Univ Berlin, Dermatol & Allergy, Berlin, Germany Univ Hosp St Etienne, Hematol, St Etienne, France Inland Norway Univ Appl Sci, Inst Biotechnol, Elverum, Norway Univ Jordan, Pediat, Amman, Jordan Inst Pasteur, Mol Mycol Unit, Paris, France Cardiff Univ, Sch Med, Inst Psychol Med & Clin Neurosci, Med Res Council Ctr Neuropsychiat Genet & Genom, Cardiff, S Glam, Wales Zurich Univ Appl Sci, Social Work, Zurich, Switzerland Jawaharlal Nehru Univ, Sch Life Sci, New Delhi, India Univ Burgundy Franche Comte, LE2I, Dijon, France Univ Roehampton, Life Sci, London, England Ghent Univ Hosp, Gen & HPB Surg, Ghent, Belgium Univ Wurzburg, Insect Fungus Symbiosis Lab, Wurzburg, Germany Radboud Univ Nijmegen, Behav Sci Inst, Nijmegen, Netherlands Fraunhofer WKI, Applicat Ctr HOFZET, Hannover, Germany UCL, Struct & Mol Biol, London, England Univ Amsterdam, Dev Psychol, Amsterdam, Netherlands Aalborg Univ, Hlth Sci & Technol, CNAP, SMI, Aalborg, Denmark VA Pittsburgh Healthcare Syst, Ctr Hlth Equity Res & Promot, Pittsburgh, PA USA Cedars Sinai Med Ctr, Neurosurg, Los Angeles, CA 90048 USA Sun Yat Sen Univ, Sch Data & Comp Sci, Guangzhou, Guangdong, Peoples R China Dezhou Univ, Shandong Prov Key Lab Biophys, Guangzhou, Guangdong, Peoples R China Maison Teledetection, Inst Rech Dev, UMR Espace DEv, Montpellier, France Xiamen Univ, Sch Life Sci, Xiamen, Fujian, Peoples R China Nanjing Univ, Sch Med, Jinling Hosp, Natl Clin Res Ctr Kidney Dis,Dept Med Imaging, Nanjing, Jiangsu, Peoples R China Univ Kent, Sch Social Policy Sociol & Social Res, Canterbury, Kent, England Univ Fed Minas Gerais, Infect Dis & Trop Med, Belo Horizonte, MG, Brazil Univ Minho, Sch Med, Life & Hlth Sci Res Inst ICVS, Braga, Portugal Univ Montreal, Biochim & Med Mol, Montreal, PQ, Canada Johns Hopkins Bloomberg Sch Publ Hlth, Epidemiol, Baltimore, MD USA Max Planck Inst Biol Ageing, Metab & Genet Regulat Ageing, Cologne, Germany Univ Swaziland, Hlth Sci, Kwaluseni, Eswatini Queensland Univ Technol, Inst Future Environm, Brisbane, Qld, Australia Ctr Sci Monaco, Dept Biol Med, Monaco, Monaco HELIOS Hosp, Urol, Bad Saarow Pieskow, Germany Tech Univ Carolo Wilhelmina Braunschweig, Inst Microbiol, Braunschweig, Germany Univ Barcelona, Barcelona Ctr Maternal Fetal & Neonatal Med, Fetal i D Fetal Med Res Ctr, IDIBAPS BCNatal,Hosp Clin, Barcelona, Spain Univ Barcelona, Hosp St Joan de Deu, Barcelona, Spain Friedrich Loeffler Inst, Inst Bacterial Infect & Zoonoses, Jena, Germany Charite Med Univ Berlin, Neurol, Berlin, Germany Dublin City Univ, Natl Inst Cellular Biotechnol, Mol Therapeut Canc Ireland, Dublin, Ireland Schoen Clin Roseneck, Prien Am Chiemsee, Germany Univ Med Ctr Hamburg Eppendorf, Inst Sex Res & Forens Psychiat, Hamburg, Germany Nankai Univ, Sch Math Sci, Tianjin, Peoples R China Nankai Univ, LPMC, Tianjin, Peoples R China Univ Oxford, Oncol, Oxford, England Royal Holloway Univ London, Class, Egham, Surrey, England Cornell Univ, Clin Sci, Ithaca, NY USA Univ KwaZulu Natal, Pharmaceut Chem, Westville Campus, Durban, South Africa Royal Coll Surgeons Ireland, Med, Dublin, Ireland Univ Oslo, Dept Immunol, Oslo, Norway Bermuda Inst Ocean Sci, Marine Nitrogen Cycling Lab, St Georges, Bermuda Kanazawa Univ, Inst Liberal Arts & Sci, Kanazawa, Ishikawa, Japan World Hlth Org Reg Off Africa, Brazzaville, Rep Congo Univ Hosp BesanCon, Infect Control Dept, Besancon, France Galapagos NV, Clin Dev, Mechelen, Belgium Univ Tasmania, Integrated Marine Observing Syst, Hobart, Tas, Australia Georg August Univ Gottingen, Albrecht von Haller Inst Plant Sci, Dept Systemat Biodivers & Evolut Plants, Gottingen, Germany Univ Occupat & Environm Hlth, Dept Psychiat, Fukuoka, Fukuoka, Japan IMDEA Food, Program Precis Nutr & Aging, Madrid, Spain Radboud Univ Nijmegen, Med Sch, IQHealthcare, Nijmegen, Netherlands Maastricht Univ, Dept Cardiovasc Surg, Maastricht, Netherlands German Diabet Ctr, Inst Clin Biochem & Pathobiochem, Dusseldorf, Germany Juntendo Univ, Grad Sch Med, Dept Radiol, Tokyo, Japan Deakin Univ, Sch Informat Technol, Melbourne, Vic, Australia Max Planck Inst Eusenforschung, Dept Interface Chem & Surface Sci, Dusseldorf, Germany Edge Hill Univ, Dept Psychol, Ormskirk, England Aga Khan Univ, Psychiat, Karachi, Pakistan KRIBB, Korean Bioinformat Ctr, Seoul, South Korea Cardinal Hlth Specialty Solut, Hlth Econ & Outcomes Res, Dallas, TX USA Klinikum Univ Munchen, Div Clin Pharmacol, Munich, Germany Univ Pittsburgh, Neurol Surg, Pittsburgh, PA USA Rhein Westfal TH Aachen, Dept Child & Adolescent Psychiat Psychosomat & Ps, Aachen, Germany Univ Copenhagen, Inst Mol & Cellular Biol, Copenhagen, Denmark St Jude Childrens Res Hosp, Struct Biol, 332 N Lauderdale St, Memphis, TN 38105 USA Royal Shrewsbury Hosp, Colorectal Surg, Shrewsbury, Salop, England Univ Nottingham, Fac Med & Hlth Sci, Nottingham, England Karolinska Inst, Dept Physiol & Pharmacol, Solna, Sweden Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Jilin, Jilin, Peoples R China Univ British Columbia, Pediat, Vancouver, BC, Canada Chinese Acad Agr Sci, State Key Lab Cotton Biol, Res Base Anyang Inst Technol, Cotton Germplasm Resources,Inst Cotton Res, Beijing, Peoples R China Chinese Univ Hong Kong, Anaesthesia & Intens Care, Hong Kong, Peoples R China Univ Macau, ICMS, Zhuhai, Guangdong, Peoples R China North China Elect Power Univ, Sch Renewable Energy, Beijing, Peoples R China Justus Liegbig Univ, Dept Internal Med, Giessen, Germany Aarhus Univ, Biosci, Aarhus, Denmark Univ Dublin, Trinity Coll Dublin, Irish Longitudinal Study Ageing TILDA, Dublin, Ireland Univ Groningen, Univ Med Ctr Groningen, Hematol, Groningen, Netherlands Vrije Univ Amsterdam Med Ctr, Child Neurol, Amsterdam, Netherlands EBI, EMBL, Cambridge, England Max Planck Inst Marine Microbiol, HGF MPG Joint Res Grp Deep Sea Ecol & Technol, Bremen, Germany Max Planck Inst Human Dev, Ctr Adapt Rat, Berlin, Germany King Faisal Univ, Math, Al Hufuf, Saudi Arabia Griffith Univ, Sch Nursing & Midwifery, Gold Coast, Qld, Australia Iowa State Univ, Roy J Carver Dept Biochemsitry Biophys & Mol Biol, Ames, IA USA Delft Univ Technol, Fac Mech Maritime & Mat Engn, Engn Thermodynam Proc & Energy Dept, Leeghwaterstr 39, NL-2628 CB Delft, Netherlands Univ Nebraska Med Ctr, Coll Allied Hlth Profess, Cytotechnol Educ, Omaha, NE USA Shinko Mem Hosp, Dept Cardiovasc Med, Kobe, Hyogo, Japan Imperial Coll London, Mat, London, England Tech Univ Munich, Dept Surg, Munich, Germany Chinese Acad Agr Sci, Res Inst Pomol, Minist Agr, Lab Qual & Safety Risk Assessment Fruit Xingcheng, Shenyang, Liaoning, Peoples R China James Madison Univ, Commun Sci & Disorders, Harrisonburg, VA 22807 USA Univ Hosp Ulm, Inst Orthopaed Res & Biomech, Ulm, Germany Univ Essex, Sch Hlth & Social Care, Colchester, Essex, England Alpha Altis, Res Serv, Nottingham, England Erasmus MC, Med Oncol, Rotterdam, Netherlands Fed Univ Oye, Dept Ind Chem, Ekiti, Nigeria Duke Univ, Med Ctr, Cell Biol, Durham, NC USA Univ Oxford, Nuffield Dept Clin Neurosci, Oxford, England Univ Manchester, Canc Res UK Manchester Inst, Manchester, Lancs, England Helsinki Univ Hosp, Childrens Hosp, Helsinki, Finland Univ Aveiro, CESAM Ctr Environm & Marine Studies, Dept Biol, Aveiro, Portugal Univ Botswana, Psychol, Gaborone, Botswana Univ Fed Bahia, Nursing Sch, Salvador, BA, Brazil Queen Mary Univ London, Biol & Expt Psychol, London, England Natl Univ Pharm, Med Chem Dept, Kharkov, Ukraine Univ Bolton, Dept Educ & Psychol, Bolton, England La Trobe Univ, Dept Chem & Phys, Melbourne, Vic, Australia Gen Hosp Northern Theater Command, Dept Gastroenterol, Shenyang, Liaoning, Peoples R China Doctors Hosp, Dept Nephrol, Athens, Greece Univ Hosp Essen, Pediat 3, Essen, Germany Imperial Coll London, Infect Dis Epidemiol, London, England Sorbonne Univ, Dept Psychiat, Paris, France UNSW Sydney, Educ, Sydney, NSW, Australia Stanford Univ, Dept Psychiat & Behav Sci, Palo Alto, CA 94304 USA Hannover Med Sch, Clin Laryngol Rhinol & Otol, Hannover, Germany Curtin Univ, Ctr Aboriginal Studies, Perth, WA, Australia Iran Univ Sci & Technol, Biomed Engn Dept, Tehran, Iran Univ Calif San Francisco, Anesthesiol, San Francisco, CA 94143 USA Khalifa Univ Sci & Technol, Mech Engn, Abu Dhabi, U Arab Emirates Univ Florida, Hort Sci, Gainesville, FL USA James Cook Univ, Australian Inst Trop Hlth & Med, Ctr Biodiscovery & Mol Dev Therapeut, Cairns, Qld, Australia Univ Porto, Fac Med, CINTESIS, Porto, Portugal Shaoxing Peoples Hosp, Med Res Ctr, Shaoxing, Zhejiang, Peoples R China NIH, Dept Transfus Med, Bethesda, MD 20892 USA AIIMS, Dept Biotechnol, New Delhi, India Univ Ottawa, Biochem Microbiol & Immunol, Ottawa, ON, Canada Univ Oslo, Inst Clin Med, Div Mental Hlth & Addict, Oslo, Norway Univ Groningen, Univ Med Ctr Groningen, Dept Radiol, Groningen, Netherlands Univ Hong Kong, Sch Nursing, Hong Kong, Peoples R China Tokyo Med Univ, Ibaraki Med Ctr, Urol, Tokyo, Japan Univ Hosp Zurich, Dept Radiat Oncol, Zurich, Switzerland Univ Maryland, Inst Human Virol, Div Immunotherapy, Baltimore, MD 21201 USA Univ Maryland, Dept Surg, Baltimore, MD 21201 USA Stellenbosch Univ, Fac Med & Hlth Sci, Div Mol Biol & Human Genet, Stellenbosch, South Africa China Agr Univ, Coll Biol Sci, Beijing, Peoples R China Osaka Univ, Grad Sch Pharmaceut Sci, Suita, Osaka, Japan Univ Washington, Biochem, Seattle, WA 98195 USA Natl Res Council Italy, Inst Biosci & BioResources, Naples, Italy Univ Lyon, Phys, Lyon, France Univ Basel, Fac Psychol, Ctr Social Psychol, Basel, Switzerland Queen Mary Univ London, Barts Canc Inst, Ctr Mol Oncol, London, England EBI, EMBL, Samples Phenotypes & Ontol Team, Cambridge, England Charles Sturt Univ, Fac Arts & Educ, Bathurst, NSW, Australia Shandong Univ, Helmholtz Inst Biotechnol, Sch Life Sci, State Key Lab Microbial Technol, Jinan, Shandong, Peoples R China Shantou Univ, Dept Biol, Shantou, Guangdong, Peoples R China Shanxi Univ, Inst Biomed Sci, Taiyuan, Shanxi, Peoples R China St Jude Childrens Res Hosp, Computat Biol, 332 N Lauderdale St, Memphis, TN 38105 USA Harbin Med Univ, Coll Bioinformat Sci & Technol, Harbin, Heilongjiang, Peoples R China NIH, Radiol & Imaging Sci, Bldg 10, Bethesda, MD 20892 USA Georgia Inst Technol, Dept Biol Sci, Atlanta, GA 30332 USA XtalPi Inc, Cambridge, MA USA Consejo Nacl Invest Cient & Tecn, Partner Inst Max Planck Soc, Inst Invest Biomed Buenos Aires IBioBA, Bioinformat, Buenos Aires, DF, Argentina Univ Sydney, Save Sight Inst, Sydney, NSW, Australia Univ South Australia, Canc Res Inst, Australian Ctr Precis Hlth, Adelaide, SA, Australia Jinan Univ, Inst Life & Hlth Engn, Guangdong Higher Educ Inst, Key Lab Funct Prot Res, Guangzhou, Guangdong, Peoples R China Univ Texas Hlth Sci Ctr Houston, Epidemiol Human Genet & Environm Sci, Houston, TX 77030 USA Weill Cornell Med, Dept Microbiol & Immunol, New York, NY USA Guangdong Inst Appl Biol Resources, Biotechnol Lab, Guangzhou, Guangdong, Peoples R China Shandong Normal Univ, Coll Life Sci, Jinan, Shandong, Peoples R China Shandong Univ, Life Sci Dept, Jinan, Shandong, Peoples R China South China Agr Univ, Integrat Microbiol Res Ctr, Guangzhou, Guangdong, Peoples R China Liaoning Acad Agr Sci, Crop Mol Improving Lab, Shenyang, Liaoning, Peoples R China Lawson Hlth Res Inst, Med Biophys, 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77030 USA Adnan Menderes Univ Aydin, Fac Nursing, Dept Publ Hlth Nursing, Aydin, Turkey Oasi Res Inst IRCCS, Dept Neurol IC, Troina, Italy Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA Kings Coll London, Kings Ctr Mil Hlth Res, London, England LSHTM, Dept Infect Dis Epidemiol, London, England Leibniz Univ Hannover, BMWZ Organ Chem, Hannover, Germany Xi An Jiao Tong Univ, Sch Basic Med Sci, Dept Physiol & Pathophysiol, Xian, Shaanxi, Peoples R China Univ South Australia, Sch Pharm & Med Sci, Adelaide, SA, Australia Univ Fed Santa Catarina, Dept Phys Educ, Florianopolis, SC, Brazil Southern Med Univ, Nanfang Hosp, Dept Oncol, Guangzhou, Guangdong, Peoples R China Stanford Univ, Hansen Expt Phys Lab, Palo Alto, CA 94304 USA Shenzhen Univ, Affiliated Hosp 1, Shenzhen Peoples Hosp 2, Inst Translat Med, Shenzhen, Guangdong, Peoples R China Univ Hong Kong, Dept Stat & Actuarial Sci, Hong Kong, Peoples R China UCL, Dept Mech Engn, London, England ASTAR, Singapore Immunol Network, Lab Microbial Immun, Singapore, Singapore Cent South Univ, State Key Lab Powder Met, Changsha, Hunan, Peoples R China Univ Aberdeen, Inst Appl Hlth Sci, Aberdeen, Scotland Univ Bridgeport, Biomed Engn, Bridgeport, CT 06601 USA Texas Tech Univ, Hlth Sci Ctr, Pharmaceut Sci, Lubbock, TX 79430 USA Univ Montana, Ecosyst & Conservat Sci, Missoula, MT 59812 USA Univ Goettingen, Dept Syst Neurosci, Gottingen, Germany NHLBI, Lab Syst Genet, Bldg 10, Bethesda, MD 20892 USA Cleveland Clin, Lou Ruvo Ctr Brain Hlth, Imaging, Las Vegas, NV USA Flinders Univ S Australia, Coll Nursing & Hlth Sci, Nutr & Dietet, Adelaide, SA, Australia Univ Padua, Dept Math, Padua, Italy Lund Univ, Fac Law, Lund, Sweden Univ Gothenburg, Dept Microbiol & Immunol, Gothenburg, Sweden NARO, Kachwekano Zardi, Entebbe, Uganda Natl Yunlin Univ Sci & Technol, Bachelor Program Interdisciplinary Studies, Touliu, Yunlin, Taiwan Aarhus Univ, Dept Biomed, Danish Res Inst Translat Neurosci DANDRITE, Aarhus, Denmark Eduardo Mondlane Univ, Math & Comp Sci, Maputo, Mozambique Univ Bern, Dept Old Age Psychiat & Psychotherapy, Bern, Switzerland RAS, Inst Cytol, Lab Cytol Unicellular Organisms, St Petersburg, Russia Beijing Inst Technol, Sch Chem & Chem Engn, Beijing, Peoples R China Univ Queensland, Queensland Alliance Agr & Food Innovat, Brisbane, Qld, Australia Fraunhofer Inst Toxicol & Expt Med ITEM, Inhalat Toxicol, Hannover, Germany Univ Hong Kong, Publ Hlth, Hong Kong, Peoples R China Univ Hlth Network, Anesthesia & Pain Med, Toronto, ON, Canada Univ Toronto, Toronto, ON, Canada Univ Bath, Dept Hlth, Bath, Avon, England Univ Copenhagen, Computat & RNA Biol, Copenhagen, Denmark Fisheries & Oceans Canada, Bedford Inst Oceanog, Dartmouth, NS, Canada Goethe Univ, CEF MC, BMLS, Phys Biol, Frankfurt, Germany Albert Einstein Coll Med, Anat & Struct Biol, New York, NY USA Queensland Govt, Dept Environm & Sci, Brisbane, Qld, Australia Uppsala Univ, Vasc Surg Sect, Dept Surg Sci, Uppsala, Sweden Childrens Canc 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Bioveterinary Res, Bacteriol & Epidemiol, Lelystad, Netherlands Guangdong Second Prov Gen Hosp, Dept Rheumatol & Immunol, Guangzhou, Guangdong, Peoples R China Erasmus MC, Biomed Rngineering, Rotterdam, Netherlands Hiroshima Univ, Grad Sch Biomed & Hlth Sci, Hiroshima, Japan Univ Iceland, Sch Hlth Sci, Reykjavik, Iceland Ohio State Univ, Mat Sci & Engn, Columbus, OH 43210 USA Kathmandu Univ, Sch Med Sci, Dept Physiotherapy, Dhulikhel, Nepal Univ Queensland, Sch Biomed Sci, Brisbane, Qld, Australia Fraunhofer MEVIS, Image Guided Therapies, Bremen, Germany Natl Univ Hlth Syst, Haematol Oncol, Singapore, Singapore Sun Yat Sen Univ, Canc Ctr, Breast Oncol, Guangzhou, Guangdong, Peoples R China Med Coll Wisconsin, Pharmacol & Toxicol, Wauwatosa, WI USA Queensland Univ Technol, Sci & Engn Fac, Sch Chem Phys & Mech Engn, Brisbane, Qld, Australia Univ Turin, Dept Mol Biotechnol & Hlth Sci, Turin, Italy Univ Tehran Med Sci, Sch Rehabil, Physiotherapy Dept, Tehran, Iran Univ Helsinki, Dept 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Apomixis, the asexual reproduction via seed, has many potential applications for plant breeding by maintaining desirable genotypes over generations. Since most major crops do not express natural apomixis, it is useful to understand the origin and maintenance of apomixis in natural plant systems. Here, we review the state of knowledge on origin, establishment and maintenance of natural apomixis. Many studies suggest that hybridization, either on diploid or polyploid cytotypes, is a major trigger for the formation of unreduced female gametophytes, which represents the first step toward apomixis, and must be combined to parthenogenesis, the development of an unfertilized egg cell. Nevertheless, fertilization of endosperm is still needed for most apomictic plants. Coupling of these three steps appears to be a major constraint for shifts to natural apomixis. Adventitious embryony is another developmental pathway toward apomixis. Establishment of a newly arisen apomictic lineage is often fostered by side- effects of polyploidy. Polyploidy creates an immediate reproductive barrier against the diploid parental and progenitor populations; it can cause a breakdown of genetic self- incompatibility (SI) systems which is needed to establish self-fertility of pseudogamous apomictic lineages; and finally, polyploidy could indirectly help to establish an apomictic cytotype in a novel ecological niche by increasing adaptive potentials of the plants. This step may be followed by a phase of diversification and range expansion, mostly described as geographical parthenogenesis. The utilization of apomixis in crops must consider the potential risks of pollen transfer and introgression into sexual crop fields, which might be overcome by using pollen-sterile or cleistogamous variants. Another risk is the escape into natural vegetation and potential invasiveness of apomictic plants which needs careful management and consideration of ecological conditions. Open-Access-Publikationsfonds 2019 peerReviewed

Polyploid genomes evolve and follow a series of dynamic transfigurations along with adaptation and speciation. The initial formation of a new polyploid individual within a diploid population usually involves a triploid bridge, a two-step mechanism of cell fusions between ubiquitous (reduced) and rare (unreduced) gametes. The primary fusion event creates an intermediate triploid individual with unbalanced genome sets, a situation of genomic-shock characterized by gene expression dysregulation, high dosage sensitivity, disturbed cell divisions, and physiological and reproductive attributes drastically altered. This near-sterile neotriploid must produce (even) eupolyploids through secondary fusion events to restore genome steadiness, meiotic balance, and fertility required for the demographic establishment of a nascent lineage. Natural conditions locate several difficulties to polyploid establishment, including the production of highly unbalanced and rarely unreduced (euploid) gametes, frequency-dependent disadvantages (minority cytotype exclusion), severe fitness loss, and ecological competition with diploid parents. Persistence and adaptation of neopolyploids depend upon genetic and phenotypic novelty coupled to joint selective forces that preserve shock-induced genomic changes (subgenome homeolog partitioning) and drive meiotic (reproductive) stabilization and ecological diversification. Thus, polyploid establishment through the triploid bridge is a feasible but not ubiquitous process that requires a number of low-probability events and singular circumstances. Yet, frequencies of polyploids suggest that polyploid establishment is a pervasive process. To explain this disparity, and supported in experimental evidence, I propose that situations like hybridization and ploidy-state transitions associated to genomic shock and substantial developmental alterations can transiently activate apomixis as a mechanism to halt genomic instability and cancel factors restraining neopolyploid’s sexual fertility, particularly in triploids. Apomixis –as a temporal alternative to sex– skip meiosis and syngamy, and thus can freeze genomic attributes, avoid unbalanced chromosomal segregation and increase the formation of unreduced euploid gametes, elude frequency-dependent reproductive disadvantages by parthenogenetic development of the embryo and permissive development of endosperm during seed formation, and increase the effective population size of the neopolyploid lineage favoring the formation rate of eupolyploids compared to aneuploids. The subsequent action of genome resilience mechanisms that alleviate transcriptomic shock and selection upon gene interactions might restore a stable meiosis and sexual fertility within few generations, as observed in synthetic polyploids. Alternatively, provided that resilience mechanisms fail, the neopolyploid might retain apomixis and hold genomically and transcriptionally altered states for many generations.

Hybridisation and polyploidy are major forces contributing to plant speciation. Homoploid (2x) and heteroploid (3x) hybrids, however, represent critical stages for evolution due to disturbed meiosis and reduced fertility. Apomixis--asexual reproduction via seeds--can overcome hybrid sterility, but requires several concerted alterations of developmental pathways to result in functional seed formation. Here, we analyse the reproductive behaviours of homo- and heteroploid synthetic hybrids from crosses between sexual diploid and tetraploid Ranunculus auricomus species to test the hypothesis that developmental asynchrony in hybrids triggers the shift to apomictic reproduction. Evaluation of male and female gametophyte development, viability and functionality of gametes shows developmental asynchrony, whereas seed set and germinability indicate reduced fitness in synthetic hybrids compared to sexual parents. We present the first experimental evidence for spontaneous apospory in most hybrids as an alternative pathway to meiosis, and the appearance of functional apomictic seeds in triploids. Bypassing meiosis permits these triploid genotypes to form viable seed and new polyploid progeny. Asynchronous development causes reduced sexual seed set and emergence of apospory in synthetic Ranunculus hybrids. Apomixis is functional in triploids and associated with drastic meiotic abnormalities. Selection acts to stabilise developmental patterns and to tolerate endosperm dosage balance shifts which facilitates successful seed set and establishment of apomictic lineages. peerReviewed

Genome evolution in asexual organisms is theoretically expected to be shaped by various factors: first, hybrid origin, and polyploidy confer a genomic constitution of highly heterozygous genotypes with multiple copies of genes; second, asexuality confers a lack of recombination and variation in populations, which reduces the efficiency of selection against deleterious mutations; hence, the accumulation of mutations and a gradual increase in mutational load (Muller's ratchet) would lead to rapid extinction of asexual lineages; third, allelic sequence divergence is expected to result in rapid divergence of lineages (Meselson effect). Recent transcriptome studies on the asexual polyploid complex Ranunculus auricomus using single-nucleotide polymorphisms confirmed neutral allelic sequence divergence within a short time frame, but rejected a hypothesis of a genome-wide accumulation of mutations in asexuals compared to sexuals, except for a few genes related to reproductive development. We discuss a general model that the observed incidence of facultative sexuality in plants may unmask deleterious mutations with partial dominance and expose them efficiently to purging selection. A little bit of sex may help to avoid genomic decay and extinction. Open Access Publikationsfonds 2015 peerReviewed

Apomixis in angiosperms is asexual reproduction from seed. Its importance to angiospermous evolution and biodiversity has been difficult to assess mainly because of insufficient taxonomic documentation. Thus, we assembled literature reporting apomixis occurrences among angiosperms and transferred the information to an internet database (http://www.apomixis.uni-goettingen.de). We then searched for correlations between apomixis occurrences and well-established measures of taxonomic diversity and biogeography. Apomixis was found to be taxonomically widespread with no clear tendency to specific groups and to occur with sexuality at all taxonomic levels. Adventitious embryony was the most frequent form (148 genera) followed by apospory (110) and diplospory (68). All three forms are phylogenetically scattered, but this scattering is strongly associated with measures of biodiversity. Across apomictic-containing orders and families, numbers of apomict-containing genera were positively correlated with total numbers of genera. In general, apomict-containing orders, families, and subfamilies of Asteraceae, Poaceae, and Orchidaceae were larger, i.e., they possessed more families or genera, than non-apomict-containing orders, families or subfamilies. Furthermore, many apomict-containing genera were found to be highly cosmopolitan. In this respect, 62% occupy multiple geographic zones. Numbers of genera containing sporophytic or gametophytic apomicts decreased from the tropics to the arctic, a trend that parallels general biodiversity. While angiosperms appear to be predisposed to shift from sex to apomixis, there is also evidence of reversions to sexuality. Such reversions may result from genetic or epigenetic destabilization events accompanying hybridization, polyploidy, or other cytogenetic alterations. Because of increased within-plant genetic and genomic heterogeneity, range expansions and diversifications at the species and genus levels may occur more rapidly upon reversion to sexuality. The significantly-enriched representations of apomicts among highly diverse and geographically-extensive taxa, from genera to orders, support this conclusion. peerReviewed

The reconstruction of reticulate evolutionary histories in plants is still a major methodological challenge. Sequences of the ITS nrDNA are a popular marker to analyze hybrid relationships, but variation of this multicopy spacer region is affected by concerted evolution, high intraindividual polymorphism, and shifts in mode of reproduction. The relevance of changes in secondary structure is still under dispute. We aim to shed light on the extent of polymorphism within and between sexual species and their putative natural as well as synthetic hybrid derivatives in the Ranunculus auricomus complex to test morphology-based hypotheses of hybrid origin and parentage of taxa. We employed direct sequencing of ITS nrDNA from 68 individuals representing three sexuals, their synthetic hybrids and one sympatric natural apomict, as well as cloning of ITS copies in four representative individuals, RNA secondary structure analysis, and landmark geometric morphometric analysis on leaves. Phylogenetic network analyses indicate additivity of parental ITS variants in both synthetic and natural hybrids. The triploid synthetic hybrids are genetically much closer to their maternal progenitors, probably due to ploidy dosage effects, although exhibiting a paternal-like leaf morphology. The natural hybrids are genetically and morphologically closer to the putative paternal progenitor species. Secondary structures of ITS1-5.8S-ITS2 were rather conserved in all taxa. The observed similarities in ITS polymorphisms suggest that the natural apomict R. variabilis is an ancient hybrid of the diploid sexual species R. notabilis and the sexual species R. cassubicifolius. The additivity pattern shared by R. variabilis and the synthetic hybrids supports an evolutionary and biogeographical scenario that R. variabilis originated from ancient hybridization. Concerted evolution of ITS copies in R. variabilis is incomplete, probably due to a shift to asexual reproduction. Under the condition of comprehensive inter- and intraspecific sampling, ITS polymorphisms are powerful for elucidating reticulate evolutionary histories. Open-Access-Publikationsfonds 2014 peerReviewed

Apomixis (asexual reproduction by seeds) has the considerable potential in agriculture and crop breeding due to its ability to produce genetically identical progenies in a form of persistent propagules, i.e. seeds. However, the processes laying behind the origin of apomixis and connected molecular mechanisms are still unknown. Despite the fact, that apomicts are considered to be an evolutionary dead-ends, they are often more widely distributed than their sexual relatives (this phenomenon is commonly referred to as geographical parthenogenesis (GP). Although this phenomenon is studied for decades, its causes are still not fully understood. Importantly, several recent studies pointed out that apomicts with limited genetic variability can at some extent react to changing environment through changes in gene transcription by epigenetic modifications. It is generally assumed, that hybridisation and polyploidization played a crucial role in the emergence of apomixis. For this reason, presented studies test the putative origin of selected polyploid apomicts and if the interspecific hybridisation between diploid sexuals triggers polyploidization using predominantly polyploid and apomictic genus Hieracium s. str. Surprisingly, the presented study demonstrates the hybrid origin of almost all investigated...