干旱区生态环境知识资源中心(Arid): Fine-scale spatial genetic structure in predominantly selfing plants with limited seed dispersal: a rule or exception?

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	Fine-scale spatial genetic structure in predominantly selfing plants with limited seed dispersal: a rule or exception?
	Sergei Volis; Danara Ormanbekova; Irina Shulgina
来源期刊	Plant DiversityPlant Diversity and Resourcues
ISSN	2095-0845
出版年	2016
卷号	38 期号:2 页码:75-81
英文摘要	Gene flow at a fine scale is still poorly understood despite its recognized importance for plant population demographic and genetic processes. We tested the hypothesis that intensity of gene flow will be lower and strength of spatial genetic structure (SGS) will be higher in more peripheral populations because of lower population density. The study was performed on the predominantly selfing Avena sterilis and included: (1) direct measurement of dispersal in a controlled environment; and (2) analyses of SGS in three natural populations, sampled in linear transects at fixed increasing inter-plant distances. We found that in A.sterilis major seed dispersal is by gravity in close (less than 2m) vicinity of the mother plant, with a minor additional effect of wind. Analysis of SGS with six nuclear SSRs revealed a significant autocorrelation for the distance class of 1m only in the most peripheral desert population, while in the two core populations with Mediterranean conditions, no genetic structure was found. Our results support the hypothesis that intensity of SGS increases from the species core to periphery as a result of decreased within-population gene flow related to low plant density. Our findings also show that predominant self-pollination and highly localized seed dispersal lead to SGS at a very fine scale, but only if plant density is not too high.
英文关键词	Gene flow Neighborhood size Spatial genetic structure Range position Core
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5703909
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335648
作者单位	Sergei Volis, Kunming Institute of Botany, Chinese Academy of Sciences, Key Laboratory of Biodiversity and Biogeography of East Asia, Chinese Academy of Sciences, Kunming, Yunnan 650201, China.; Irina Shulgina, Kunming Institute of Botany, Chinese Academy of Sciences, Key Laboratory of Biodiversity and Biogeography of East Asia, Chinese Academy of Sciences, Kunming, Yunnan 650201, China.; Danara Ormanbekova, Department of Agricultural Sciences, University of Bologna, Bologna, Emilia-Romagna 40126, Italy.
推荐引用方式 GB/T 7714	Sergei Volis,Danara Ormanbekova,Irina Shulgina. Fine-scale spatial genetic structure in predominantly selfing plants with limited seed dispersal: a rule or exception?[J],2016,38(2):75-81.
APA	Sergei Volis,Danara Ormanbekova,&Irina Shulgina.(2016).Fine-scale spatial genetic structure in predominantly selfing plants with limited seed dispersal: a rule or exception?.Plant DiversityPlant Diversity and Resourcues,38(2),75-81.
MLA	Sergei Volis,et al."Fine-scale spatial genetic structure in predominantly selfing plants with limited seed dispersal: a rule or exception?".Plant DiversityPlant Diversity and Resourcues 38.2(2016):75-81.