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

Cormier F., Throude M., Ravel C., Le Gouis J., Leveugle M., Lafarge S., Exbrayat F., Duranton N., Praud S.. 2015. Agronomy (Basel), 5 (4) : p. 143-151.

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. (Résumé d'auteur)

Thématique : Génétique et amélioration des plantes

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