6533b873fe1ef96bd12d4527

RESEARCH PRODUCT

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

Jelmer A. ElzingaJelmer A. ElzingaFrédéric AusterlitzSara TeixeiraSara TeixeiraGiorgina BernasconiJérôme GoudetMarta Barluenga

subject

0106 biological sciencesGene FlowChloroplast DnaPollinationSeed dispersalSeed dispersalHadena-Bicrurismedicine.disease_causeGenes Plant010603 evolutionary biology01 natural sciences03 medical and health sciencesPollinatorPollenGeneticsmedicineSilene latifoliaSileneGenetics (clinical)030304 developmental biologyIsolation by distance2. Zero hunger0303 health sciences[SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE]biologyEcologyta1184Plant-population sizeGenetic Variationfood and beveragesbiology.organism_classificationY-ChromosomeDioica CaryophyllaceaeGynodioecious plantF-StatisticsGenetic structureSeedsPollen dispersalta1181Biological dispersalPollenAutocorrelation analysisOriginal ArticleMicrosatellite Repeats

description

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 meta-population 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. Heredity (2011) 106, 13-24; doi:10.1038/hdy.2010.38; published online 14 April 2010 Swiss National Science Foundation [3100A0-122004/1, PIOIA-119443]; Fondation Pierre Mercier pour la Science info:eu-repo/semantics/publishedVersion

yearjournalcountryeditionlanguage
2010-04-14
10.1038/hdy.2010.38https://hdl.handle.net/10400.1/11382