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题名: Fine-Scale Spatial Genetic Structure in Emmer Wheat and the Role of Population Range Position
作者: Volis, Sergei1; Song, Minshu1; Zhang, Yong-Hong2; Shulgina, Irina1
刊名: EVOLUTIONARY BIOLOGY
关键词: Gene flow ; Neighborhood size ; Pollen flow ; Sp statistics ; Spatial autocorrelation
英文摘要: The extent of spatial genetic structure (SGS) within plant populations depends on seed and pollen dispersal distance, breeding type, level of self-fertilization and effective plant density. Self-fertilizing species with gravity-dispersed seeds are expected to have both small effective population sizes and low pollen movement leading to high genetic structure. Higher SGS can be expected in more patchy and peripheral populations because of lower plant density and population sizes, and lower intensity of gene flow. We tested these predictions analyzing SGS in two core and two peripheral populations of predominantly self-fertilizing emmer wheat. Analysis of SGS with 11 nuclear microsatellites revealed (1) a negative linear relationship between kinship coefficients, calculated for pairs of individuals, and the logarithm of geographical distance between members of the pairs, in all studied populations; and (2) a significant autocorrelation for a distance up to 5 m (core populations) or 20 m (peripheral populations). Pollen flow, estimated from comparison of nuclear and chloroplast variation, was spatially limited, as was seed dispersal. Our results support a hypothesized relationship between SGS intensity and breeding system, the mode of seed dispersal and the population range position (core vs. periphery).
出版日期: 2014-03-01
卷号: 41, 期号:1, 页码:166-173
语种: 英语
收录类别: SCI
学科分类: Evolutionary Biology
ISSN号: 0071-3260
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/17957
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
2.Yunnan Normal Univ, Dept Life Sci, Kunming 650204, Peoples R China

Recommended Citation:
Volis,Sergei*;Song,Minshu;Zhang,YongHong;Shulgina,Irina.Fine-Scale Spatial Genetic Structure in Emmer Wheat and the Role of Population Range Position,EVOLUTIONARY BIOLOGY,2014,41(1):166-173
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