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Natural selection hampers divergence of reproductive traits in a seed beetle
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
2010 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 23, no 9, 1857-1867 p.Article in journal (Refereed) Published
Abstract [en]

Speciation is thought to often result from indirect selection for reproductive isolation. This will occur when reproductive traits that cause reproductive isolation evolve (i) as a by-product of natural selection on traits with which they are genetically correlated or (ii) as an indirect result of diversifying sexual selection. Here, we use experimental evolution to study the degree of divergent evolution of reproductive traits by manipulating the intensity of natural and sexual selection in replicated selection lines of seed beetles. Following 40 generations of selection, we assayed the degree of divergent evolution of reproductive traits between replicate selection lines experiencing the same selection regime. The evolution of reproductive traits was significantly divergent across selection lines within treatments. The evolution of reproductive traits was both slower and, more importantly, significantly less divergent among lines experiencing stronger directional natural selection. This suggests that reproductive traits did not evolve as an indirect by-product of adaptation. We discuss several ways in which natural selection may hamper divergent evolution among allopatric populations.

Place, publisher, year, edition, pages
2010. Vol. 23, no 9, 1857-1867 p.
Keyword [en]
artificial selection, Bruchidae, Callosobruchus maculatus, divergent adaptation, ecological speciation, genetic constraints, insect-host plant association, multivariate selection, postmating sexual selection, sperm competition
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-135182DOI: 10.1111/j.1420-9101.2010.02050.xISI: 000281141800004OAI: oai:DiVA.org:uu-135182DiVA: diva2:374632
Available from: 2010-12-06 Created: 2010-12-06 Last updated: 2017-12-12Bibliographically approved

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Arnqvist, Göran

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