Identifying loci with breeding potential across temperate and tropical adaptation via EigenGWAS and EnvGWAS

文献类型： 外文期刊

第一作者： Li, Jing

作者： Li, Jing;Rasheed, Awais;Wang, Jiankang;Li, Huihui;Chen, Guo-Bo;Rasheed, Awais;Li, Delin;Schnable, Patrick S.;Li, Delin;Schnable, Patrick S.;Sonder, Kai;Espinosa, Cristian Zavala;Costich, Denise E.;Hearne, Sarah J.;Li, Huihui;Schnable, Patrick S.;Schnable, Patrick S.

作者机构：

关键词： adaptation; domestication; EigenGWAS; EnvGWAS; maize; selection

期刊名称：MOLECULAR ECOLOGY （ 影响因子：6.185； 五年影响因子：6.801 ）

ISSN： 0962-1083

年卷期： 2019 年 28 卷 15 期

页码：

收录情况： SCI

摘要： Understanding the genomic basis of adaptation in maize is important for gene discovery and the improvement of breeding germplasm, but much remains a mystery in spite of significant population genetics and archaeological research. Identifying the signals underpinning adaptation are challenging as adaptation often coincided with genetic drift, and the base genomic diversity of the species in massive. In this study, tGBS technology was used to genotype 1,143 diverse maize accessions including landraces collected from 20 countries and elite breeding lines of tropical lowland, highland, subtropical/midaltitude and temperate ecological zones. Based on 355,442 high-quality single nucleotide polymorphisms, 13 genomic regions were detected as being under selection using the bottom-up searching strategy, EigenGWAS. Of the 13 selection regions, 10 were first reported, two were associated with environmental parameters via EnvGWAS, and 146 genes were enriched. Combining large-scale genomic and ecological data in this diverse maize panel, our study supports a polygenic adaptation model of maize and offers a framework to enhance our understanding of both the mechanistic basis and the evolutionary consequences of maize domestication and adaptation. The regions identified here are promising candidates for further, targeted exploration to identify beneficial alleles and haplotypes for deployment in maize breeding.

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