Genetic Architecture Underlying Nascent Speciation-The Evolution of Eurasian Pigs under Domestication

文献类型： 外文期刊

第一作者： Xie, Hai-Bing

作者： Xie, Hai-Bing;Adeola, Adeniyi C.;Zhang, Ya-Ping;Wang, Li-Gang;Zhang, Long-Chao;Wang, Li-Xian;Fan, Chen-Yu;Yin, Xue;Zhang, Ya-Ping;Zeng, Zhao-Bang;Zhang, Ya-Ping

作者机构：

关键词： pig domestication; nascent speciation; partial hybrid inviability; Dobzhansky-Muller incompatibility; autosomal interactions

期刊名称：MOLECULAR BIOLOGY AND EVOLUTION （ 影响因子：16.24； 五年影响因子：18.67 ）

ISSN： 0737-4038

年卷期： 2021 年 38 卷 9 期

页码：

收录情况： SCI

摘要： Speciation is a process whereby the evolution of reproductive barriers leads to isolated species. Although many studies have addressed large-effect genetic footprints in the advanced stages of speciation, the genetics of reproductive isolation in nascent stage of speciation remains unclear. Here, we show that pig domestication offers an interesting model for studying the early stages of speciation in great details. Pig breeds have not evolved the large X-effect of hybrid incompatibility commonly observed between "good species." Instead, deleterious epistatic interactions among multiple autosomal loci are common. These weak Dobzhansky-Muller incompatibilities confer partial hybrid inviability with sex biases in crosses between European and East Asian domestic pigs. The genomic incompatibility is enriched in pathways for angiogenesis, androgen receptor signaling and immunity, with an observation of many highly differentiated cis-regulatory variants. Our study suggests that partial hybrid inviability caused by pervasive but weak interactions among autosomal loci may be a hallmark of nascent speciation in mammals.

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