Role of selection and gene flow in population differentiation at the edge vs. interior of the species range differing in climatic conditions

doi:10.1111/mec.13565

	Role of selection and gene flow in population differentiation at the edge vs. interior of the species range differing in climatic conditions
	Volis, S.1; Ormanbekova, D.2; Shulgina, I.1
	2016-04-01
发表期刊	MOLECULAR ECOLOGY
卷号	25 期号:7 页码:1449-1464
摘要	Evaluating the relative importance of neutral and adaptive processes as determinants of population differentiation across environments is a central theme of evolutionary biology. We applied the Q(ST)-F-ST comparison flanked by a direct test for local adaptation to infer the role of climate-driven selection and gene flow in population differentiation of an annual grass Avena sterilis in two distinct parts of the species range, edge and interior, which represent two globally different climates, desert and Mediterranean. In a multiyear reciprocal transplant experiment, the plants of desert and Mediterranean origin demonstrated home advantage, and population differentiation in several phenotypic traits related to reproduction exceeded neutral predictions, as determined by comparisons of Q(ST) values with theoretical F-ST distributions. Thus, variation in these traits likely resulted from local adaptation to desert and Mediterranean environments. The two separate common garden experiments conducted with different experimental design revealed that two population comparisons, in contrast to multi-population comparisons, are likely to detect population differences in virtually every trait, but many of these differences reflect effects of local rather than regional environment. We detected a general reduction in neutral (SSR) genetic variation but not in adaptive quantitative trait variation in peripheral desert as compared with Mediterranean core populations. On the other hand, the molecular data indicated intensive gene flow from the Mediterranean core towards desert periphery. Although species range position in our study (edge vs. interior) was confounded with climate (desert vs. Mediterranean), the results suggest that the gene flow from the species core does not have negative consequences for either performance of the peripheral plants or their adaptive potential.
关键词	Adaptive Potential Aridity Gene Flow Local Adaptation Peripheral Populations Phenotypic Variation Population Differentiation q(St) Vs F-st Species Range
DOI	10.1111/mec.13565
收录类别	SCI
语种	英语
WOS记录号	WOS:000373104500005
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/26183
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China 2.Univ Bologna, Dept Agr Sci, I-40127 Bologna, Italy
推荐引用方式 GB/T 7714	Volis, S.,Ormanbekova, D.,Shulgina, I.. Role of selection and gene flow in population differentiation at the edge vs. interior of the species range differing in climatic conditions[J]. MOLECULAR ECOLOGY,2016,25(7):1449-1464.
APA	Volis, S.,Ormanbekova, D.,&Shulgina, I..(2016).Role of selection and gene flow in population differentiation at the edge vs. interior of the species range differing in climatic conditions.MOLECULAR ECOLOGY,25(7),1449-1464.
MLA	Volis, S.,et al."Role of selection and gene flow in population differentiation at the edge vs. interior of the species range differing in climatic conditions".MOLECULAR ECOLOGY 25.7(2016):1449-1464.

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