Domestication affects sex-biased gene expression evolution in the duck

文献类型： 外文期刊

第一作者： Gu, Hongchang

作者： Gu, Hongchang;Zhang, Li;Gu, Hongchang;Zhu, Tao;Qu, Lujiang;Wang, Liang;Lv, Xueze;Yang, Weifang;Chen, Yu;Zhang, Zebin;Jia, Yaxiong

作者机构：

关键词： sex-biased expression; sequence evolution; sexual selection; domestication; duck

期刊名称：ROYAL SOCIETY OPEN SCIENCE （ 影响因子：3.5； 五年影响因子：3.5 ）

ISSN： 2054-5703

年卷期： 2023 年 10 卷 4 期

页码：

收录情况： SCI

摘要： Genes with sex-biased expression are thought to underlie sexually dimorphic phenotypes and are therefore subject to different selection pressures in males and females. Many authors have proposed that sexual conflict leads to the evolution of sex-biased expression, which allows males and females to reach separate phenotypic and fitness optima. The selection pressures associated with domestication may cause changes in population architectures and mating systems, which in turn can alter their direction and strength. We compared sex-biased expression and genetic signatures in wild and domestic ducks (Anas platyrhynchos), and observed changes of sexual selection and identified the genomic divergence affected by selection forces. The extent of sex-biased expression in both sexes is positively correlated with the level of both d(N)/d(S) and nucleotide diversity. This observed changing pattern may mainly be owing to relaxed genetic constraints. We also demonstrate a clear link between domestication and sex-biased evolutionary rate in a comparative framework. Decreased polymorphism and evolutionary rate in domesticated populations generally matched life-history phenotypes known to experience artificial selection. Taken together, our work suggests the important implications of domestication in sex-biased evolution and the roles of artificial selection and sexual selection for shaping the diversity and evolutionary rate of the genome.

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