Genetic Constraints and the Evolution of Display Trait Sexual Dimorphism by Natural and Sexual Selection.

Chenoweth, S. F., Rundle, H. D. and Blows, M. W. (2008) Genetic Constraints and the Evolution of Display Trait Sexual Dimorphism by Natural and Sexual Selection.. American Naturalist, 171 1: 22-34. doi:10.1086/523946

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Author Chenoweth, S. F.
Rundle, H. D.
Blows, M. W.
Title Genetic Constraints and the Evolution of Display Trait Sexual Dimorphism by Natural and Sexual Selection.
Journal name American Naturalist   Check publisher's open access policy
ISSN 0003-0147
Publication date 2008-01
Year available 2008
Sub-type Article (original research)
DOI 10.1086/523946
Open Access Status File (Publisher version)
Volume 171
Issue 1
Start page 22
End page 34
Total pages 13
Place of publication Chicago, United States
Publisher The University of Chicago Press
Collection year 2009
Language eng
Subject C1
970106 Expanding Knowledge in the Biological Sciences
060303 Biological Adaptation
060412 Quantitative Genetics (incl. Disease and Trait Mapping Genetics)
Abstract The evolution of sexual dimorphism involves an interaction between sex-specific selection and a breakdown of genetic constraints that arise because the two sexes share a genome. We examined genetic constraints and the effect of sex-specific selection on a suite of sexually dimorphic display traits in Drosophila serrata. Sexual dimorphism varied among nine natural populations covering a substantial portion of the species range. Quantitative genetic analyses showed that intersexual genetic correlations were high because of autosomal genetic variance but that the inclusion of X-linked effects reduced genetic correlations substantially, indicating that sex linkage may be an important mechanism by which intersexual genetic constraints are reduced in this species. We then explored the potential for both natural and sexual selection to influence these traits, using a 12-generation laboratory experiment in which we altered the opportunities for each process as flies adapted to a novel environment. Sexual dimorphism evolved, with natural selection reducing sexual dimorphism, whereas sexual selection tended to increase it overall. To this extent, our results are consistent with the hypothesis that sexual selection favors evolutionary divergence of the sexes. However, sex-specific responses to natural and sexual selection contrasted with the classic model because sexual selection affected females rather than males.
Keyword Drosophila serrata
cuticular hydrocarbons
X chromosome
sex linkage
experimental evolution
intralocus sexual conflict
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Biological Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 71 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 70 times in Scopus Article | Citations
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Created: Wed, 14 Jan 2009, 15:43:48 EST by Gail Walter on behalf of School of Biological Sciences