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Latest Research:explore the domestication history of Upland cotton

Update Time: 2017-03-29 10:41:00Click: times

On March 7th 2017, the top international journal Nature Genetics (IF = 31.616) published the latest research results of the cotton group led by Professor Zhang Xianlong- "Asymmetric subgenome selection in cotton domestication process (Asymmetric subgenome selection and cis-regulatory divergence during cotton domestication). This study not only presents the genetic basis of cotton fiber domestication for the first time, but also describes the effect of domestication on gene transcription regulation. This study is another significant advance in the field of cotton genome research and has an important guiding role in cotton functional genomics research and genetic improvement.



Comparative population genomics offers an excellent opportunity for unraveling the genetic history of crop domestication. Upland cotton (Gossypium hirsutum) has long been an important economic crop, but a genome-wide and evolutionary understanding of the effects of human selection is lacking. Here, we describe a variation map for 352 wild and domesticated cotton accessions. We scanned 93 domestication sweeps occupying 74 Mb of the A subgenome and 104 Mb of the D subgenome, and identified 19 candidate loci for fiber-quality-related traits through a genome-wide association study. We provide evidence showing asymmetric subgenome domestication for directional selection of long fibers. Global analyses of DNase I–hypersensitive sites and 3D genome architecture, linking functional variants to gene transcription, demonstrate the effects of domestication on cis-regulatory divergence. This study provides new insights into the evolution of gene organization, regulation and adaptation in a major crop, and should serve as a rich resource for genome-based cotton improvement.                  

doi:10.1038/ng.3807      IF=31.616