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The interplay between local ecology, divergent selection and genetic drift in population divergence of a sexually antagonistic female trait

Author:
  • Kristina Karlsson
  • Erik Svensson
  • Johannes Bergsten
  • Roger Härdling
  • Bengt Hansson
Publishing year: 2014
Language: English
Pages: 1934-1946
Publication/Series: Evolution
Volume: 68
Issue: 7
Document type: Journal article
Publisher: Wiley-Blackwell

Abstract english

Genetically polymorphic species offer the possibility to study maintenance of genetic variation and the potential role for genetic drift in population divergence. Indirect inference of the selection regimes operating on polymorphic traits can be achieved by comparing population divergence in neutral genetic markers with population divergence in trait frequencies. Such an approach could further be combined with ecological data to better understand agents of selection. Here, we infer the selective regimes acting on a polymorphic mating trait in an insect group; the dorsal structures (either rough or smooth) of female diving beetles. Our recent work suggests that the rough structures have a sexually antagonistic function in reducing male mating attempts. For two species (Dytiscus lapponicus and Graphoderus zonatus), we could not reject genetic drift as an explanation for population divergence in morph frequencies, while for the third (Hygrotus impressopunctatus) we found that divergent selection pulls morph frequencies apart across populations. Furthermore, population morph frequencies in H. impressopunctatus were significantly related to local bioclimatic factors, providing an additional line of evidence for local adaptation in this species. These data therefore suggest that local ecological factors and sexual conflict interact over larger spatial scales to shape population divergence in the polymorphism. This article is protected by copyright. All rights reserved.

Keywords

  • Evolutionary Biology

Other

Published
  • CAnMove
  • BECC
  • ISSN: 1558-5646
erik_svensson
E-mail: erik [dot] svensson [at] biol [dot] lu [dot] se

Professor

Evolutionary ecology

+46 46 222 38 19

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Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden