Molecular and quantitative genetic differentiation in [i]Sitobion avenae[/i] populations from both sides of the Qinling Mountains
| Autor: | Da Wang, Xiaoqin Shi, Deguang Liu, Xianliang Huang, Jean-Christophe Simon |
|---|---|
| Přispěvatelé: | Northwest Agriculture and Forestry University, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Biodiversité et Ecologie
Quantitative Trait Loci lcsh:Medicine Population genetics flux de gènes Quantitative trait locus Biology différenciation génétique Gene flow Biodiversity and Ecology sitobion avenae Genetic drift Sitobion avenae Genetic variation Animals Selection Genetic sélection divergente lcsh:Science Local adaptation chine Multidisciplinary Natural selection Ecology lcsh:R Genetic Drift Genetic Variation DNA Biological Evolution Genetics Population spéciation adaptation locale Evolutionary biology puceron Aphids lcsh:Q [SDE.BE]Environmental Sciences/Biodiversity and Ecology Research Article |
| Zdroj: | PLoS ONE PLoS ONE, Public Library of Science, 2015, 10 (3), pp.e0122343. ⟨10.1371/journal.pone.0122343⟩ Plos One 3 (10), e0122343. (2015) PLoS ONE, Vol 10, Iss 3, p e0122343 (2015) PLoS ONE, 2015, 10 (3), pp.e0122343. ⟨10.1371/journal.pone.0122343⟩ |
| ISSN: | 1932-6203 |
| Popis: | International audience; Quantitative trait differences are often assumed to be correlated with molecular variation, but the relationship is not certain, and empirical evidence is still scarce. To address this issue, we sampled six populations of the cereal aphid Sitobion avenae from areas north and south of the Qinling Mountains, and characterized their molecular variation at seven microsatellite loci and quantitative variation at nine life-history traits. Our results demonstrated that southern populations had slightly longer developmental times of nymphs but much higher lifetime fecundity, compared to northern populations. Of the nine tested quantitative characters, eight differed significantly among populations within regions, as well as between northern and southern regions. Genetic differentiation in neutral markers was likely to have been caused by founder events and drift. Increased subdivision for quantitative characters was found in northern populations, but reduced in southern populations. This phenomenon was not found for molecular characters, suggesting the decoupling between molecular and quantitative variation. The pattern of relationships between FST and QST indicated divergent selection and suggested that local adaptation play a role in the differentiation of life-history traits in tested S. avenae populations, particularly in those traits closely related to reproduction. The main role of natural selection over genetic drift was also supported by strong structural differences in G-matrices among S. avenae populations. However, cluster analyses did not result in two groups corresponding to northern and southern regions. Genetic differentiation between northern and southern populations in neutral markers was low, indicating considerable gene flow between them. The relationship between molecular and quantitative variation, as well as its implications for differentiation and evolution of S. avenae populations, was discussed. |
| Databáze: | OpenAIRE |
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