Multivariate quantitative genetics and the Lek Paradox: genetic variance in male sexually selected traits of Drosophila serrata under field control

Hine, E. J., Chenoweth, S. F. and Blows, M. W. (2004) Multivariate quantitative genetics and the Lek Paradox: genetic variance in male sexually selected traits of Drosophila serrata under field control. Evolution, 58 12: 2754-2762. doi:10.1554/04-558


Author Hine, E. J.
Chenoweth, S. F.
Blows, M. W.
Title Multivariate quantitative genetics and the Lek Paradox: genetic variance in male sexually selected traits of Drosophila serrata under field control
Formatted title
Multivariate quantitative genetics and the Lek Paradox: genetic variance in male sexually selected traits of Drosophila serrata under field control
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
1558-5646
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.1554/04-558
Volume 58
Issue 12
Start page 2754
End page 2762
Total pages 9
Editor D.M. Waller
Place of publication Lawrence
Publisher The Society for the Study of Evolution
Language eng
Subject 270207 Quantitative Genetics
780105 Biological sciences
Abstract Single male sexually selected traits have been found to exhibit substantial genetic variance, even though natural and sexual selection are predicted to deplete genetic variance in these traits. We tested whether genetic variance in multiple male display traits of Drosophila serrata was maintained under field conditions. A breeding design involving 300 field-reared males and their laboratory-reared offspring allowed the estimation of the genetic variance-covariance matrix for six male cuticular hydrocarbons (CHCs) under field conditions. Despite individual CHCs displaying substantial genetic variance under field conditions, the vast majority of genetic variance in CHCs was not closely associated with the direction of sexual selection measured on field phenotypes. Relative concentrations of three CHCs correlated positively with body size in the field, but not under laboratory conditions, suggesting condition-dependent expression of CHCs under field conditions. Therefore condition dependence may not maintain genetic variance in preferred combinations of male CHCs under field conditions, suggesting that the large mutational target supplied by the evolution of condition dependence may not provide a solution to the lek paradox in this species. Sustained sexual selection may be adequate to deplete genetic variance in the direction of selection, perhaps as a consequence of the low rate of favorable mutations expected in multiple trait systems.
Keyword Evolutionary biology
Genetics & heredity
Condition dependence
Genetic variance-covariance Matrix
Genic capture
Sexual selection
Condition-dependent traits
Mate recognition
Q-Index Code C1
Institutional Status UQ

 
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Created: Wed, 15 Aug 2007, 13:49:45 EST