Whole-genome resequencing of the wheat A subgenome progenitor Triticum urartu provides insights into its demographic history and geographic adaptation

文献类型： 外文期刊

第一作者： Wang, Xin

作者： Wang, Xin;Li, Yiwen;Yang, Wenlong;Sun, Jiazhu;Li, Xin;Ling, Hongqing;Zhang, Aimin;Liu, Dongcheng;Zhang, Aimin;Wang, Xin;Zhou, Shengjun;Hu, Yafei;He, Weiming;Yu, Kang;Zhang, Chi;Zheng, Fengya;Zhao, Shancen;Kong, Lingrang;Yu, Kang;Zhao, Shancen

作者机构：

关键词： Triticum urartu; whole-genome resequencing; demographic history; geographic adaptation; selective sweep; GWAS

期刊名称：PLANT COMMUNICATIONS （ 影响因子：8.625； 五年影响因子：8.625 ）

ISSN： 2590-3462

年卷期： 2022 年 3 卷 5 期

页码：

收录情况： SCI

摘要： Triticum urartu is the progenitor of the A subgenome in tetraploid and hexaploid wheat. Uncovering the landscape of genetic variations in T. urartu will help us understand the evolutionary and polyploid characteristics of wheat. Here, we investigated the population genomics of T. urartu by genome-wide sequencing of 59 representative accessions collected around the world. A total of 42.2 million high -quality single-nucleotide polymorphisms and 3 million insertions and deletions were obtained by map-ping reads to the reference genome. The ancient T. urartu population experienced a significant reduction in effective population size (Ne) from -3 000 000 to -140 000 and subsequently split into eastern Medi-terranean coastal and Mesopotamian-Transcaucasian populations during the Younger Dryas period. A map of allelic drift paths displayed splits and mixtures between different geographic groups, and a strong genetic drift towards hexaploid wheat was also observed, indicating that the direct donor of the A subgenome originated from northwestern Syria. Genetic changes were revealed between the eastern Mediterranean coastal and Mesopotamian-Transcaucasian populations in genes orthologous to those regulating plant development and stress responses. A genome-wide association study identified two single-nucleotide polymorphisms in the exonic regions of the SEMI-DWARF 37 ortholog that corre-sponded to the different T. urartu ecotype groups. Our study provides novel insights into the origin and genetic legacy of the A subgenome in polyploid wheat and contributes a gene repertoire for genomics-enabled improvements in wheat breeding.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序