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The maintenance of mitochondrial genetic variation by negative frequency-dependent selection
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.
2014 (English)In: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 17, no 1, 22-27 p.Article in journal (Refereed) Published
Abstract [en]

Mitochondrial genes generally show high levels of standing genetic variation, which is puzzling given the accumulating evidence for phenotypic effects of mitochondrial genetic variation. Negative frequency-dependent selection, where the relative fitness of a genotype is inversely related to its frequency in a population, provides a potent and potentially general process that can maintain mitochondrial polymorphism. We assessed the change in mitochondrial haplotype frequencies over 10 generations of experimental evolution in 180 seed beetle populations in the laboratory, where haplotypes competed for propagation to subsequent generations. We found that haplotypes consistently increased in frequency when they were initially rare and decreased in frequency when initially common. Our results have important implications for the use of mtDNA haplotype frequency data to infer population level processes and they revive the general hypothesis that negative frequency-dependent selection, presumably caused by habitat heterogeneity, may commonly promote polymorphism in ecologically relevant life history genes.

Place, publisher, year, edition, pages
2014. Vol. 17, no 1, 22-27 p.
Keyword [en]
Callosobruchus, competition, epistasis, habitat heterogeneity, life history evolution, mtDNA, niche, phylogeography, population biology
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-216052DOI: 10.1111/ele.12195ISI: 000328315900003OAI: oai:DiVA.org:uu-216052DiVA: diva2:689204
Available from: 2014-01-20 Created: 2014-01-17 Last updated: 2017-08-02Bibliographically approved

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Arnqvist, Göran

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