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Genomic footprints of sorghum domestication and breeding selection for multiple end uses

文献类型： 外文期刊

作者： Wu, Xiaoyuan 1 ; Liu, Yuanming 1 ; Leng, Chuanyuan 1 ; Liu, Zhiquan 1 ; Li, Zhigang 1 ; Lu, Xiaochun 5 ; Cai, Hongwei 4 ; Hao, Huaiqing 1 ; Jing, Hai-Chun 1 ;

作者机构： 1.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China

2.Chinese Acad Sci, Inst Bot, Engn Lab Grass Based Livestock Husb, Beijing 100093, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.China Agr Univ, Coll Grassland Sci & Technol, Beijing 100193, Peoples R China

5.Liaoning Acad Agr Sci, Inst Sorghum Res, Shenyang 110161, Peoples R China

关键词： sorghum (Sorghum bicolor); genomic footprints; end uses; domestication and diversification genes SbTB1; Sh1 and Dry; molecular breeding

期刊名称：MOLECULAR PLANT （ 影响因子：21.949； 五年影响因子：19.617 ）

ISSN： 1674-2052

年卷期： 2022 年 15 卷 3 期

页码：

收录情况： SCI

摘要： Domestication and diversification have had profound effects on crop genomes. Originating in Africa and subsequently spreading to different continents, sorghum (Sorghum bicolor) has experienced multiple onsets of domestication and intensive breeding selection for various end uses. However, how these processes have shaped sorghum genomes is not fully understood. In the present study, population genomics analyses were performed on a worldwide collection of 445 sorghum accessions, covering wild sorghum and four end-use subpopulations with diverse agronomic traits. Frequent genetic exchanges were found among various subpopulations, and strong selective sweeps affected 14.68% (= 107.5 Mb) of the sorghum genome, including 3649, 4287, and 3888 genes during sorghum domestication, improvement of grain sorghum, and improvement of sweet sorghum, respectively. Eight different models of haplotype changes in domestication genes from wild sorghum to landraces and improved sorghum were observed, and Sh1- and SbTB1-type genes were representative of two prominent models, one of soft selection or multiple origins and one of hard selection or an early single domestication event. We also demonstrated that the Dry gene, which regulates stem juiciness, was unconsciously selected during the improvement of grain sorghum. Taken together, these findings provide new genomic insights into sorghum domestication and breeding selection, and will facilitate further dissection of the domestication and molecular breeding of sorghum.

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