12 results on '"Volk, Gayle"'
Search Results
2. Cryopreservation of Grapevine Shoot Tips from In Vitro Plants Using Droplet Vitrification and V Cryo-plate Techniques
- Author
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Bettoni, Jean Carlos, Pathirana, Ranjith, Bonnart, Remi, Shepherd, Ashley, Volk, Gayle, Faisal, Mohammad, editor, and Alatar, Abdulrahman A., editor
- Published
- 2019
- Full Text
- View/download PDF
3. Genebank Conservation of Germplasm Collected from Wild Species
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Walters, Christina, Richards, Christopher M., Volk, Gayle M., Greene, Stephanie L., editor, Williams, Karen A., editor, Khoury, Colin K., editor, Kantar, Michael B., editor, and Marek, Laura F., editor
- Published
- 2018
- Full Text
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4. Conserving Citrus Diversity: From Vavilov's Early Explorations to Genebanks around the World.
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Volk, Gayle M., Gmitter Jr., Frederick G., and Krueger, Robert R.
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CITRUS ,MANDARIN orange ,CITRUS fruits ,POMELO ,ORANGES ,GRAPEFRUIT ,GERMPLASM - Abstract
Citrus is among the most economically important fruit crops. Its vast species diversity and global production was observed by N.I. Vavilov during his international plant explorations from the early to mid-1900s. Currently, ex situ citrus collections located around the world conserve and protect citrus genetic resources, as revealed in a survey conducted in 2021. Responses were received from 43 collections in 27 countries, of which 35 provided data regarding collection composition, management practices, and security, as well as other information. The six largest citrus collections have between 1000 and 1735 accessions. The largest accession holdings are mandarins and sweet oranges, although all citrus fruit types are maintained: mandarin, sweet orange, lemon, pummelo, grapefruit, hybrids, lime, sour orange, citron, kumquat, papeda, finger lime, and crop wild relatives. Diseases pose significant threats to collections, though some collections are maintained in a clean-plant state as a result of intensive sanitation efforts. National and regional quarantine regulations often limit the export and import of citrus plants or propagative materials, thus limiting the availability of materials at an international level. Resources, both financial and human, are necessary to ensure the long-term safety and security of citrus collections on a global scale. Future efforts to develop citrus genebanking communities will provide opportunities for improved conservation, as well as collaborations and training. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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- View/download PDF
5. Shoot tip cryotherapy for plant pathogen eradication.
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Wang, Min‐Rui, Bi, Wen‐Lu, Bettoni, Jean Carlos, Zhang, Dong, Volk, Gayle M., and Wang, Qiao‐Chun
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PHYTOPATHOGENIC microorganisms ,COLD therapy ,PLANT viruses ,PLANT diseases ,GERMPLASM - Abstract
Diseases caused by plant pathogens such as viruses, viroids and phytoplasmas cause huge economic losses of agricultural production and limit the safe movement of plant materials across borders. The use of pathogen‐free planting materials provides a strategy for efficient management of these diseases and facilitates the global exchange of genetic resources. Shoot tip cryotherapy is a novel biotechnology method that uses cryogenic procedures to eradicate plant pathogens from the diseased plants. Combining thermotherapy or chemotherapy with shoot tip cryotherapy has further enhanced pathogen eradication efficiency. This review provides updated and comprehensive information on shoot tip cryotherapy and the combination of thermotherapy or chemotherapy with shoot tip cryotherapy for pathogen eradication. Prospects are proposed for future studies. [ABSTRACT FROM AUTHOR]
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- 2022
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6. Training in Plant Genetic Resources Management: A Way Forward.
- Author
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Volk, Gayle M., Namuth-Covert, Deana, and Byrne, Patrick F.
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PLANT germplasm , *WORKSHOPS (Facilities) , *RESOURCE management , *GERMPLASM , *LIBRARY resources , *CULTURAL property - Abstract
Plant genetic resource collections are national treasures that are critical to the success of breeding programs and the long‐term resiliency of agriculture in the United States and worldwide. The USDA National Plant Germplasm System (NPGS) is a coordinated network of 19 genebank locations throughout the United States that conserve and protect nearly 600,000 accessions representing ∼16,000 plant species. The expertise of current curators must be captured, and training materials must be developed to educate the next generation of those who maintain and use plant genetic resources. A group of experts convened in April 2018 to discuss the needs, pedagogical approaches, educational content, delivery platforms, and mechanisms for sustaining a possible future plant genetic resources management training program. A three‐component approach was envisioned to achieve the task of educating current and future genebank managers, as well as those who use genetic resources in their research and breeding programs. The proposed training program will include the development of online Resource Libraries, online courses, and workshops. Resource Libraries, hosted by GRIN‐Global, will make learning objects, downloadable information, and links to other online sources publicly available. These Resource Libraries will be available for use in existing classes, as well as for the development of new workshops and online courses. Development of, and public access to, training resources will capture key information about genebanking, make it more widely available, and secure its long‐term viability. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
7. Integrating Genomic and Phenomic Approaches to Support Plant Genetic Resources Conservation and Use.
- Author
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Volk, Gayle M., Byrne, Patrick F., Coyne, Clarice J., Flint-Garcia, Sherry, Reeves, Patrick A., and Richards, Chris
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PLANT germplasm ,PLANT gene banks ,PLANT conservation ,GERMPLASM ,GENOTYPES ,INFORMATION resources ,INFORMATION storage & retrieval systems - Abstract
Plant genebanks provide genetic resources for breeding and research programs worldwide. These programs benefit from having access to high-quality, standardized phenotypic and genotypic data. Technological advances have made it possible to collect phenomic and genomic data for genebank collections, which, with the appropriate analytical tools, can directly inform breeding programs. We discuss the importance of considering genebank accession homogeneity and heterogeneity in data collection and documentation. Citing specific examples, we describe how well-documented genomic and phenomic data have met or could meet the needs of plant genetic resource managers and users. We explore future opportunities that may emerge from improved documentation and data integration among plant genetic resource information systems. [ABSTRACT FROM AUTHOR]
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- 2021
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8. Grapevine Shoot Tip Cryopreservation and Cryotherapy: Secure Storage of Disease-Free Plants.
- Author
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Bettoni, Jean Carlos, Marković, Zvjezdana, Bi, Wenlu, Volk, Gayle M., Matsumoto, Toshikazu, and Wang, Qiao-Chun
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GERMPLASM conservation ,GRAPES ,COLD therapy ,GERMPLASM ,VIRUS diseases ,VITIS vinifera ,GRAPE diseases & pests - Abstract
Grapevine (Vitis spp.) is one of the most economically important temperate fruit crops. Grapevine breeding programs require access to high-quality Vitis cultivars and wild species, which may be maintained within genebanks. Shoot tip cryopreservation is a valuable technique for the safe, long-term conservation of Vitis genetic resources that complements traditional field and in vitro germplasm collections. Vitis is highly susceptible to virus infections. Virus-free plants are required as propagation material for clonally propagated germplasm, and also for the global exchange of grapevine genetic resources. Shoot tip cryotherapy, a method based on cryopreservation, has proven to be effective in eradicating viruses from infected plants, including grapevine. This comprehensive review outlines/documents the advances in Vitis shoot tip cryopreservation and cryotherapy that have resulted in healthy plants with high regrowth levels across diverse Vitis species. [ABSTRACT FROM AUTHOR]
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- 2021
- Full Text
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9. Identification of "Duplicate" Accessions within the USDA-ARS National Plant Germplasm System Malus Collection.
- Author
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Gross, Briana L., Volk, Gayle M., Richards, Christopher M., Forsline, Philip L., Fazio, Gennaro, and Chao, C. Thomas
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GERMPLASM , *DIPLOIDY , *APPLES , *CULTIVARS , *INVENTORIES , *GENETIC markers - Abstract
The article focuses on a study by the National Plant Germplasm System (NPGS) of the U.S. Department of Agriculture which compares the genotypes of diploid Malus domestica cultivars with wild and domesticated samples. It mentions that the comparison carried out on the basis of nine simple sequence repeat (SSR) loci to identify cultivars that are genetically identical. It concludes that a comparison and coordination of collection inventories can be made with a proper selection of markers.
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- 2012
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10. Capturing the Diversity of Wild Malus orientalis from Georgia, Armenia, Russia, and Turkey.
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Volk, Gayle M., Richards, Christopher M., Henk, Adam D., Reilley, Ann A., Reeves, Patrick A., Forsline, Philip L., and Aldwinckle, Herb S.
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FRUIT trees , *APPLES , *ERWINIA amylovora , *VENTURIA inaequalis , *GERMPLASM - Abstract
Seeds from wild Malus orientalis trees were collected during explorations to Armenia (2001, 2002), Georgia (2004), Turkey (1999), and Russia (1998). Seedling orchards with between eight and 171 individuals from each collection location were established at the U.S. Department of Agriculture-Agricultural Research Service Plant Genetic Resources Unit (PGRU) in Geneva, NY. Genotypic (seven microsatellite markers) and disease resistance data were collected for the 776 M. orientalis trees. The genetic diversity of the 280 individuals from Armenia and Georgia was compared with data previously published for the M. orientalis individuals from Russia and Turkey. A total of 106 alleles were identified in the trees from Georgia and Armenia and the average gene diversity ranged from 0.47 to 0.85 per locus. The genetic differentiation among sampling locations was greater than that found between the two countries. Six individuals from Armenia exhibited resistance to fire blight (Erwinia amylovora), apple scab (Venturia inaequalis), and cedar apple rust (Gymnosporangium juniperi-virginianae). The allelic richness across all loci in the individuals from Armenia and Georgia was statistically the same as that across all loci in the individuals from Russia and Turkey. A core set of 27 trees was selected to capture 93% of the alleles represented by the entire PGRU collection of 776 M. orientalis trees. This core set representing all four countries was selected based on genotypic data using a modified maximization algorithm. The trees selected for the M. orientalis core collection will be added to the main field collection at the PGRU. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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11. Development, progress and future prospects in cryobiotechnology of Lilium spp.
- Author
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Li, Jing-Wei, Zhang, Xiao-Chen, Wang, Min-Rui, Bi, Wen-Lu, Faisal, M., da Silva, Jaime A. Teixeira, Volk, Gayle M., and Wang, Qiao-Chun
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LILIES ,PLANT germplasm ,GERMPLASM ,BIOTECHNOLOGY ,GERMPLASM conservation ,MYCOSES - Abstract
Lilium is one of the most popular flower crops worldwide, and some species are also used as vegetables and medicines. The availability of and easy access to diverse Lilium genetic resources are essential for plant genetic improvements. Cryopreservation is currently considered as an ideal means for the long-term preservation of plant germplasm. Over the last two decades, great efforts have been exerted in studies of Lilium cryopreservation and progress has been made in the successful cryopreservation of pollen, seeds and shoot tips in Lilium. Genes that exist in Lilium, including those that regulate flower shape, color and size, and that are resistant to cold stress and diseases caused by fungi and viruses, provide a rich source of valuable genetic resources for breeding programs to create novel cultivars required by the global floriculture and ornamental markets. Successful cryopreservation of Lilium spp. is a way to preserve these valuable genes. The present study provides updated and comprehensive information about the development of techniques that have advanced Lilium cryopreservation. Further ideas are proposed to better direct future studies on Lilium cryobiotechnology. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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12. Potential applications of cryogenic technologies to plant genetic improvement and pathogen eradication.
- Author
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Wang, Biao, Wang, Ren-Rui, Cui, Zhen-Hua, Bi, Wen-Lu, Li, Jing-Wei, Li, Bai-Quan, Ozudogru, Elif Aylin, Volk, Gayle M., and Wang, Qiao-Chun
- Subjects
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CRYOGENICS , *PLANT genetics , *PHYTOPATHOGENIC microorganisms , *DISEASE eradication , *AGRICULTURAL productivity , *PLANT breeding - Abstract
Abstract: Rapid increases in human populations provide a great challenge to ensure that adequate quantities of food are available. Sustainable development of agricultural production by breeding more productive cultivars and by increasing the productive potential of existing cultivars can help meet this demand. The present paper provides information on the potential uses of cryogenic techniques in ensuring food security, including: (1) long-term conservation of a diverse germplasm and successful establishment of cryo-banks; (2) maintenance of the regenerative ability of embryogenic tissues that are frequently the target for genetic transformation; (3) enhancement of genetic transformation and plant regeneration of transformed cells, and safe, long-term conservation for transgenic materials; (4) production and maintenance of viable protoplasts for transformation and somatic hybridization; and (5) efficient production of pathogen-free plants. These roles demonstrate that cryogenic technologies offer opportunities to ensure food security. [Copyright &y& Elsevier]
- Published
- 2014
- Full Text
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