Reducing mutation load through sexual selection on males

McGuigan, Kate, Petfield, Donna and Blows, Mark W. (2011) Reducing mutation load through sexual selection on males. Evolution, 65 10: 2816-2829. doi:10.1111/j.1558-5646.2011.01346.x


Author McGuigan, Kate
Petfield, Donna
Blows, Mark W.
Title Reducing mutation load through sexual selection on males
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
1558-5646
Publication date 2011-10
Sub-type Article (original research)
DOI 10.1111/j.1558-5646.2011.01346.x
Volume 65
Issue 10
Start page 2816
End page 2829
Total pages 14
Place of publication Oxford, U.K.
Publisher Wiley-Blackwell Publishing
Collection year 2012
Language eng
Abstract Mutation load is a key parameter in evolutionary theories, but relatively little empirical information exists on the mutation load of populations, or the elimination of this load through selection. We manipulated the opportunity for sexual selection within a mutation accumulation divergence experiment to determine how sexual selection on males affected the accumulation of mutations contributing to sexual and nonsexual fitness. Sexual selection prevented the accumulation of mutations affecting male mating success, the target trait, as well as reducing mutation load on productivity, a nonsexual fitness component. Mutational correlations between mating success and productivity (estimated in the absence of sexual selection) were positive. Sexual selection significantly reduced these fitness component correlations. Male mating success significantly diverged between sexual selection treatments, consistent with the fixation of genetic differences. However, the rank of the treatments was not consistent across assays, indicating that the mutational effects on mating success were conditional on biotic and abiotic context. Our experiment suggests that greater insight into the genetic targets of natural and sexual selection can be gained by focusing on mutational rather than standing genetic variation, and on the behavior of trait variances rather than means.
Keyword Drosophila serrata
Mating success
Mutation load
Productivity
Fitness
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 28 June 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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Created: Mon, 12 Sep 2011, 12:11:21 EST by Gail Walter on behalf of School of Biological Sciences