Genome-wide signatures of geographic expansion and breeding process in soybean
Li, Y.-h.; Qin, C.; Wang, L.; Jiao, C.; Hong, H.; Tian, Y.; Li, Y.; Xing, G.; Wang, J.; Gu, Y.; Gao, X.; Li, D.; Li, H.; Liu, Z.; Jing, X.; Feng, B.; Zhao, T.; Guan, R.; Guo, Y.; Liu, J.; Yan, Z.; Zhang, L.; Ge, T.; Li, X.; Wang, X.; Qiu, H.; Zhang, W.; Luan, X.; Han, Y.; Han, D.; Chang, R.; Guo, Y.; Reif, J. C.; Jackson, S. A.; Liu, B.; Tian, S.; Qiu, L.-J.
Show abstract
The clarification of genomic signatures left during evolutionary histories of crops is crucial for breeding varieties adapting to changing climate. Soybean, a leguminous crop, provides both plant oil and protein. Here, we analyzed genome sequences of 2,214 soybeans and proposed its evolutionary route, which includes four geographic paths, expansion of annual wild soybean (Glycine soja Sieb. & Zucc.) from Southern China, domestication in Central China, expansion of landrace (G. max (L.) Merr.), and local breeding. We observed that local adaptation of the wild and cultivated soybeans was largely independent, and that genetic introgression was mostly derived from sympatric rather than allopatric wild populations during the range expansion of soybean landraces. Range expansion and breeding processes were accompanied with positive selection of flowering-time genes including GmSPA3c as validated by knock-out mutants. Our study shed lights on the evolutionary history of soybean and provides valuable genetic resources for future breeding. TeaserThe expansion and selection history of soybean
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