Journal article
Evidence for stabilizing selection and slow divergent evolution of male genitalia in a millipede (antichiropus variabilis)
Evolution, Vol.66(4), pp.1138-1153
2011
Abstract
It is generally accepted that postcopulatory sexual selection drives rapid divergence of genital morphology among isolated populations. The mode of selection operating upon genitalia can be explored by comparing patterns of population divergence in genetic and genitalic traits. We collected Antichiropus variabilis millipedes from eight localities across the species range. Levels of among-population genetic divergence, at microsatellite loci, and the mitochondrial COI gene were very high. Following geometric morphometric analyses, genital morphology was also found to be highly divergent among the populations surveyed, whereas head morphology had not diverged as markedly. However, pairwise comparisons of F ST and P ST showed that among-population divergence in both genital and head shape was significantly lower than that experienced by neutral genetic markers. Our results suggest that the genitalia of A. variabilis are currently experiencing a period of stabilizing selection, the mode of selection expected for genitalia that function in species recognition via a "lock-and-key" mechanism. Our results demonstrate that although genital morphology can clearly diverge among genetically isolated populations, divergence is not necessarily as rapid as commonly argued, and continuous directional sexual selection may not always underpin the evolutionary divergence of male genitalia.
Details
- Title
- Evidence for stabilizing selection and slow divergent evolution of male genitalia in a millipede (antichiropus variabilis)
- Authors/Creators
- J.M. Wojcieszek (Author/Creator) - The University of Western AustraliaL.W. Simmons (Author/Creator) - The University of Western Australia
- Publication Details
- Evolution, Vol.66(4), pp.1138-1153
- Publisher
- Society for the Study of Evolution
- Identifiers
- 991005542458407891
- Copyright
- © 2011 The Author(s).
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.35 Zoology & Animal Ecology
- 3.35.434 Sexual Selection
- Web Of Science research areas
- Ecology
- Evolutionary Biology
- Genetics & Heredity
- ESI research areas
- Plant & Animal Science