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Local selection modifies phenotypic divergence among Rana temporaria populations in the presence of gene flow
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.ORCID iD: 0000-0002-5553-2691
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
2010 (English)In: Molecular Ecology, ISSN 0962-1083, E-ISSN 1365-294X, Vol. 19, no 4, 716-731 p.Article in journal (Refereed) Published
Abstract [en]

In ectotherms, variation in life history traits among populations is common and suggests local adaptation. However, geographic variation itself is not a proof for local adaptation, as genetic drift and gene flow may also shape patterns of quantitative variation. We studied local and regional variation in means and phenotypic plasticity of larval life history traits in the common frog Rana temporaria using six populations from central Sweden, breeding in either open-canopy or partially closed-canopy ponds. To separate local adaptation from genetic drift, we compared differentiation in quantitative genetic traits (Q(ST)) obtained from a common garden experiment with differentiation in presumably neutral microsatellite markers (F-ST). We found that R. temporaria populations differ in means and plasticities of life history traits in different temperatures at local, and in F-ST at regional scale. Comparisons of differentiation in quantitative traits and in molecular markers suggested that natural selection was responsible for the divergence in growth and development rates as well as in temperature-induced plasticity, indicating local adaptation. However, at low temperature, the role of genetic drift could not be separated from selection. Phenotypes were correlated with forest canopy closure, but not with geographical or genetic distance. These results indicate that local adaptation can evolve in the presence of ongoing gene flow among the populations, and that natural selection is strong in this system.

Place, publisher, year, edition, pages
2010. Vol. 19, no 4, 716-731 p.
Keyword [en]
countergradient variation, gene flow, genetic drift, local adaptation, phenotypic plasticity
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-137398DOI: 10.1111/j.1365-294X.2009.04502.xISI: 000273953400009OAI: oai:DiVA.org:uu-137398DiVA: diva2:378429
Available from: 2010-12-15 Created: 2010-12-15 Last updated: 2017-12-11Bibliographically approved

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Rogell, Björn

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