Detection of NAM-A1 natural variants in bread wheat reveals differences in haplotype distribution between a worldwide core collection and european elite germplasm

Cormier Fabien, Throude Mickaël, Ravel Catherine, Le Gouis Jacques, Leveugle Magalie, Lafarge Stéphane, Exbrayat Florence, Duranton Nadine, Praud Sébastien. 2015. Detection of NAM-A1 natural variants in bread wheat reveals differences in haplotype distribution between a worldwide core collection and european elite germplasm. Agronomy (Basel), 5 (4) : 143-151.

https://doi.org/10.3390/agronomy5020143

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Résumé : In wheat, remobilization of nitrogen absorbed before anthesis and regulation of monocarpic senescence is a major issue in breeding for nutrient use efficiency. We identified natural variants of NAM-A1, a gene having the same role as its well-characterized homoeolog NAM-B1, a NAC transcription factor associated with senescence kinetics and nutrient remobilization to the grain. Differences in haplotype frequencies between a worldwide core collection and a panel of European elite varieties were assessed and discussed. Moreover, hypotheses for the loss of function of the most common haplotype in elite European germplasm are discussed.

Mots-clés Agrovoc : Triticum turgidum, Triticum aestivum, Triticum, Transcription génique, germoplasme

Classification Agris : F30 - Génétique et amélioration des plantes

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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