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Article
2023
Genetic variation for cold tolerance in two nested association mapping populations
Genetic variation for cold tolerance in two nested association mapping populations
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
Abstract (English)
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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Agronomy, 13 (2023), 1, 195.
https://doi.org/10.3390/agronomy13010195.
ISSN: 2073-4395
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English
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630 Agriculture
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Sustainable Development Goals
BibTeX
@article{Revilla2023,
url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16510},
doi = {10.3390/agronomy13010195},
author = {Revilla, Pedro and Butrón, Ana and Rodriguez, Víctor Manuel et al.},
title = {Genetic Variation for Cold Tolerance in Two Nested Association Mapping Populations},
journal = {2073-4395},
year = {2023},
volume = {13},
number = {1},
}