Genetic Variation for Cold Tolerance in Two Nested Association Mapping Populations
2023
Revilla, Pedro | Butrón, Ana | Rodriguez, Víctor, Manuel | Rincent, Renaud | Charcosset, Alain | Giauffret, Catherine | Melchinger, Albrecht, E | Schön, Chris-Carolin | Bauer, Eva | Altmann, Thomas | Brunel, Dominique | Moreno-González, Jesús | Campo, Laura | Ouzunova, Milena | Álvarez, Ángel | Ruíz de Galarreta, José, Ignacio | Laborde, Jacques | Malvar, Rosa, Ana | Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] (CSIC) | Génétique Quantitative et Evolution - Le Moulon (Génétique Végétale) (GQE-Le Moulon) ; AgroParisTech-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | LaBoratoire d'Imagerie biOmédicale MultimodAle Paris-Saclay (BIOMAPS) ; Service Hospitalier Frédéric Joliot (SHFJ) ; Université Paris-Saclay-Institut des Sciences du Vivant Frédéric JOLIOT (JOLIOT) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut des Sciences du Vivant Frédéric JOLIOT (JOLIOT) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS) | Stress Abiotiques et Différenciation des Végétaux Cultivés (SADV) ; Université de Lille, Sciences et Technologies-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Universität Hohenheim = University of Hohenheim | Technische Universität Munchen = Technical University Munich = Université Technique de Munich (TUM) | Leibniz Institute of Plant Genetics and Crop Plant Research [Gatersleben] (IPK-Gatersleben) | Etude du Polymorphisme des Génomes Végétaux (EPGV) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Centro de Investigaciones Agrarias de Mabegondo (CIAM) | KWS SAAT SE & Co.KGaA | Estación Experimental de Aula Dei (EEAD) ; Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] (CSIC) | Instituto Vasco de Investigación y Desarrollo Agrario [Derio] (NEIKER) | Unité expérimentale du maïs (BORDX ST-MARTIN UE) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
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Mostrar más [+] Menos [-]Inglés. Cold reduces maize (Zea mays L.) production and delays sowings. Cold tolerance in maize is very limited, and breeding maize for cold tolerance is still a major challenge. Our objective was to detect QTL for cold tolerance at germination and seedling stages. We evaluated, under cold and control conditions, 919 Dent and 1009 Flint inbred lines from two nested association mapping designs consisting in 24 double-haploid populations, genotyped with 56,110 SNPs. We found a large diversity of maize cold tolerance within these NAM populations. We detected one QTL for plant weight and four for fluorescence under cold conditions, as well as one for plant weight and two for chlorophyll content under control conditions in the Dent-NAM. There were fewer significant QTL under control conditions than under cold conditions, and half of the QTL were for quantum efficiency of photosystem II. Our results supported the large genetic discrepancy between optimal and low temperatures, as the quantity and the position of the QTL were very variable between control and cold conditions. Furthermore, as we have not found alleles with significant effects on these NAM designs, further studies are needed with other experimental designs to find favorable alleles with important effects for improving cold tolerance in maize.
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