The maintenance of mitochondrial genetic variation by negative frequency-dependent selection
| Autor: | Göran Arnqvist, Erem Kazancıoğlu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
epistasis
Mitochondrial DNA habitat heterogeneity life history evolution Population Frequency-dependent selection Biology phylogeography DNA Mitochondrial Genetic variation Naturvetenskap Animals Genetic variability Selection Genetic education Ecology Evolution Behavior and Systematics Genetics education.field_of_study Experimental evolution Ecology mtDNA Haplotype population biology Genetic Variation Coleoptera niche Genes Mitochondrial Callosobruchus Epistasis Natural Sciences competition |
| Zdroj: | Ecology Letters |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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