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Postdomestication selection of MKK3 shaped seed dormancy and end-use traits in barley
Journal article   Peer reviewed

Postdomestication selection of MKK3 shaped seed dormancy and end-use traits in barley

Morten E Jørgensen, Dominique Vequaud, Yucheng Wang, Christian B Andersen, Micha Bayer, Amanda Box, Katarzyna B Braune, Yuanyang Cai, Fahu Chen, Jose A Cuesta-Seijo, …
Science (American Association for the Advancement of Science), Vol.391, 6780
2025
DOI: https://doi.org/10.1126/science.adx2022
PMID: 41196947

Abstract

Anthropogenic selection of grain traits such as dormancy has shaped the developmental trajectories of crops. In cereals, shortening dormancy provides rapid and even post-harvest germination, but increases the risk of weather-induced pre-harvest sprouting (PHS) with yearly harvest losses beyond 1 billion USD. Our understanding of how, why, when and where cereal dormancy diversification arose is fragmentary. Here, we show in the founder crop barley ( ) that dormancy is primarily regulated through a mosaic of locus haplotypes comprising copy-number variation and inherent kinase activity of ( ). We provide evidence supporting the historical selection of specific haplotypes that shape dormancy levels according to changing climatic pressures and outline a genetic framework for breeders to balance grain dormancy and PHS-avoidance.

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