气候变化领域集成服务门户(CCPortal): Genomic divergence between two sister Medicago species triggered by the quaternary climatic oscillations on the Qinghai-Tibet plateau and northern China

CCPortal

DOI	10.1111/mec.16925
	Genomic divergence between two sister Medicago species triggered by the quaternary climatic oscillations on the Qinghai-Tibet plateau and northern China
	Guo, Wei; Yang, Yingbo; Zhang, Xu; Chen, Jinyuan; Wu, Shuang; Yang, Jinli; Qu, Kunjing; He, Ling; Liu, Meijun; Hu, Hongyin; Liu, Zhipeng; Ren, Guangpeng
发表日期	2023
ISSN	0962-1083
EISSN	1365-294X
起始页码	3118
结束页码	3132
卷号	32 期号:12
英文摘要	Speciation is a central topic in evolutionary biology. However, how genomic divergence originates and accumulates in the face of gene flow during ecological adaptation remains poorly understood. Closely related species that have adapted to distinct environments but inhabit some overlapping ranges provide an ideal system to evaluate this issue. Here, we combine population genomics and species distribution models (SDMs) to examine genomic divergences between two sister plant species, Medicago ruthenica and M. archiducis-nicolai, that occur in northern China and the northeast Qinghai-Tibet Plateau, respectively, with overlapping distributions in the border of the two regions. M. ruthenica and M. archiducis-nicolai are well-delimited based on population genomic data, although hybrids exist in sympatric sampling locations. Coalescent simulations and SDMs suggest that the two species diverged from each other in the Quaternary but have been in continuous contact with gene flow occurring between the two species since then. We also discovered positive selection signatures associated with genes both outside and within genomic islands in both species that are probably involved in adaptations to arid and high-altitude environments. Our findings provide insights into how natural selection and climatic changes in the Quaternary initiated and maintained interspecific divergence of these two sister species.
关键词	closely related species ecological adaptation quaternary climatic oscillations speciation with gene flow species distribution modelling
英文关键词	PHYLOGENETIC ANALYSIS; GENETIC CONSEQUENCES; EVOLUTIONARY HISTORY; HYBRID ORIGIN; SPECIATION; ISLANDS; TOOL; DIFFERENTIATION; HITCHHIKING; ADAPTATION
WOS研究方向	Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
WOS记录号	WOS:000956420900001
来源期刊	MOLECULAR ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283145
作者单位	Lanzhou University; Zhengzhou University; Qinghai Normal University; Lanzhou University
推荐引用方式 GB/T 7714	Guo, Wei,Yang, Yingbo,Zhang, Xu,et al. Genomic divergence between two sister Medicago species triggered by the quaternary climatic oscillations on the Qinghai-Tibet plateau and northern China[J],2023,32(12).
APA	Guo, Wei.,Yang, Yingbo.,Zhang, Xu.,Chen, Jinyuan.,Wu, Shuang.,...&Ren, Guangpeng.(2023).Genomic divergence between two sister Medicago species triggered by the quaternary climatic oscillations on the Qinghai-Tibet plateau and northern China.MOLECULAR ECOLOGY,32(12).
MLA	Guo, Wei,et al."Genomic divergence between two sister Medicago species triggered by the quaternary climatic oscillations on the Qinghai-Tibet plateau and northern China".MOLECULAR ECOLOGY 32.12(2023).