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High-depth resequencing of 312 accessions reveals the local adaptation of foxtail millet

文献类型： 外文期刊

作者： Li, Congcong 1 ; Wang, Genping 2 ; Li, Haiquan 2 ; Wang, Guoliang 1 ; Ma, Jian 3 ; Zhao, Xin 1 ; Huo, Linhe 1 ; Zhang, Li 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Agrobiotechnol Res Ctr, Beijing Key Lab Agr Genet Resources & Biotechnol, Beijing 100097, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Inst Millet Crops, Key Lab Minor Crops Hebei Prov, Shijiazhuang 050035, Hebei, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Beijing Vegetable Res Ctr, Natl Engn Res Ctr Vegetables, Beijing Key Lab Vegetable Germplasms Improvement, Beijing 100097, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2021 年 134 卷 5 期

页码：

收录情况： SCI

摘要： Key message Based on the high-density variation map, we identified genome-level evidence for local adaptation and demonstrated that Siprr37 with transposon insertion contributes to the fitness of foxtail millet in the northeastern ecoregion. Adaptation is a robust way through which plants are able to overcome environmental constraints. The mechanisms of adaptation in heterogeneous natural environments are largely unknown. Deciphering the genomic basis of local adaptation will contribute to further improvement in domesticated plants. To this end, we describe a high-depth (19.4 x) haplotype map of 3.02 million single nucleotide polymorphisms in foxtail millet (Setaria italica) from whole-genome resequencing of 312 accessions. In the genome-wide scan, we identified a set of improvement signals (including the homologous gene of OsIPA1, a key gene controlling ideal plant architecture) related to the geographical adaptation to four ecoregions in China. In particular, based on the genome-wide association analysis results, we identified the contribution of a pseudo-response regulator gene, SiPRR37, to heading date adaptation in foxtail millet. We observed the expression changes of SiPRR37 resulted from a key Tc1-Mariner transposon insertion in the first intron. Positive selection analyses revealed that SiPRR37 mainly contributed to the adaptation of northeastern ecoregions. Taken together, foxtail millet adapted to the northeastern region by regulating the function of SiPRR37, which sheds lights on genome-level evidence for adaptive geographical divergence. Besides, our data provide a nearly complete catalog of genomic variation aiding the identification of functionally important variants.

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