1. Cold Tolerance in Two Large Maize Inbred Panels Adapted to European Climates
- Author
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Rosa Ana Malvar Pintos, Laura Campo, Chris-Carolin Schön, Ángel Álvarez Rodríguez, Alain Charcosset, Manuel Ordás Pérez, Dominique Brunel, Eva Bauer, Pedro Revilla Temiño, Albrecht E. Melchinger, Víctor Manuel Rodríguez Graña, Jesús Moreno-González, Jacques Laborde, Milena Ouzunova, Jose Ignacio Ruiz de Galarreta, Renaud Rincent, Thomas Altmann, Catherine Giauffret, Misión Biológica de Galicia, Spanish National Research Council (CSIC), Génétique Quantitative et Evolution - Le Moulon (Génétique Végétale) (GQE-Le Moulon), Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Paris-Sud - Paris 11 (UP11)-Institut National de la Recherche Agronomique (INRA), Stress Abiotiques et Différenciation des Végétaux Cultivés (SADV), Université de Lille, Sciences et Technologies-Institut National de la Recherche Agronomique (INRA), Universitat Honenheim, Partenaires INRAE, Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), Leibniz Institute of Plant Genetics and Crop Plant Research, Leibniz Association, Etude du Polymorphisme des Génomes Végétaux (EPGV), Institut National de la Recherche Agronomique (INRA), Centro de Investigaciones Agrarias de Mabegondo (CIAM), KWS SAAT SE & Co.KGaA, Estación Experimental de Aula Dei, and Instituto Vasco de Investigación y Desarrollo Agrario [Derio] (NEIKER)
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CORN ,Engineering ,Cold tolerance ,[SDV]Life Sciences [q-bio] ,LINES ,Biology ,INHERITANCE ,LOW-TEMPERATURES ,7. Clean energy ,03 medical and health sciences ,0302 clinical medicine ,CHILLING TOLERANCE ,Botany ,[SDV.BV]Life Sciences [q-bio]/Vegetal Biology ,FIELD ,030304 developmental biology ,General Environmental Science ,2. Zero hunger ,0303 health sciences ,QUANTITATIVE TRAIT LOCI ,business.industry ,GENETIC-VARIATION ,ZEA-MAYS-L ,Biotechnology ,Agronomy ,General Earth and Planetary Sciences ,GROWTH ,business ,Agronomy and Crop Science ,030217 neurology & neurosurgery - Abstract
34 págs., 5 tabl. The definitive version is available at: https://www.crops.org/publications/cs, Maize (Zea mays L.) for northern growing areas requires cold tolerance for extending the vegetative period. Our objectives were to evaluate two large panels of maize inbred lines adapted to Europe for cold tolerance and to estimate the effects of cold-related traits on biomass production. Two inbred panels were evaluated for cold tolerance per se and in testcrosses under cold and control conditions in a growth chamber and under field conditions. Comparisons of inbreds and groups of inbreds were made taking into account the single nucleotide polymorphisms (SNP)-based genetic structure of the panels, and the factors affecting biomass production were studied. Eight flint and one dent inbred with diverse origins were the most cold tolerant. The most cold-tolerant dent and flint groups were the Iodent Ph207 and the Northern Flint D171 groups, respectively. The relationships between inbred per se and testcross performance and between controlled and field conditions were low. Regressions with dry matter yield in the field as dependent variable identified plant height (R2 = 0.285) as the main independent variable, followed by quantum efficiency of photosystem II (R2 = 0.034) and other traits with minor contributions. Cold-tolerance–related traits had low and negative effects on dry matter yield. Models intending the prediction of final performance from traits scored in early developmental stages are not expected to be precise enough for breeding. For improving cold tolerance, inbreds released from crosses among the No Iodent group and the Northern Flint group may show high combining ability, as well as between both groups and the Northern Flint D171 group., This research was supported in the framework of the Plant-KBBE program (project acronym “Cornfed”) by the Spanish Ministry of Science and Innovation (proj. EUI2008-03642 and EUI2008-03635), the French National Agency for Research (ANR, Ministry of High Education and Research), and the German Federal Ministry of Education and Research (grant numbers 0315461AD).
- Published
- 2014