Fine-scale spatial genetic structure and gene dispersal in Silene latifolia.

Details

Serval ID
serval:BIB_2F41EA668646
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Fine-scale spatial genetic structure and gene dispersal in Silene latifolia.
Journal
Heredity
Author(s)
Barluenga M., Austerlitz F., Elzinga J.A., Teixeira S., Goudet J., Bernasconi G.
ISSN
1365-2540 (Electronic)
ISSN-L
0018-067X
Publication state
Published
Issued date
2011
Volume
106
Number
1
Pages
13-24
Language
english
Abstract
Plants are sessile organisms, often characterized by limited dispersal. Seeds and pollen are the critical stages for gene flow. Here we investigate spatial genetic structure, gene dispersal and the relative contribution of pollen vs seed in the movement of genes in a stable metapopulation of the white campion Silene latifolia within its native range. This short-lived perennial plant is dioecious, has gravity-dispersed seeds and moth-mediated pollination. Direct measures of pollen dispersal suggested that large populations receive more pollen than small isolated populations and that most gene flow occurs within tens of meters. However, these studies were performed in the newly colonized range (North America) where the specialist pollinator is absent. In the native range (Europe), gene dispersal could fall on a different spatial scale. We genotyped 258 individuals from large and small (15) subpopulations along a 60 km, elongated metapopulation in Europe using six highly variable microsatellite markers, two X-linked and four autosomal. We found substantial genetic differentiation among subpopulations (global F(ST)=0.11) and a general pattern of isolation by distance over the whole sampled area. Spatial autocorrelation revealed high relatedness among neighboring individuals over hundreds of meters. Estimates of gene dispersal revealed gene flow at the scale of tens of meters (5-30 m), similar to the newly colonized range. Contrary to expectations, estimates of dispersal based on X and autosomal markers showed very similar ranges, suggesting similar levels of pollen and seed dispersal. This may be explained by stochastic events of extensive seed dispersal in this area and limited pollen dispersal.
Keywords
Gene Flow, Genes, Plant, Genetic Variation, Microsatellite Repeats/genetics, Pollen/genetics, Seeds/genetics, Silene/genetics
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2011 15:51
Last modification date
20/08/2019 14:13
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