The contribution of selection and genetic constraints to phenotypic divergence

Chenoweth, Stephen F., Rundle, Howard D. and Blows, Mark W. (2010) The contribution of selection and genetic constraints to phenotypic divergence. American Naturalist, 175 2: 186-196. doi:10.1086/649594

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Author Chenoweth, Stephen F.
Rundle, Howard D.
Blows, Mark W.
Title The contribution of selection and genetic constraints to phenotypic divergence
Journal name American Naturalist   Check publisher's open access policy
ISSN 0003-0147
Publication date 2010-02
Sub-type Article (original research)
DOI 10.1086/649594
Open Access Status File (Publisher version)
Volume 175
Issue 2
Start page 186
End page 196
Total pages 10
Place of publication Chicago, IL, United States
Publisher University of Chicago Press
Collection year 2011
Language eng
Subject C1
0603 Evolutionary Biology
0604 Genetics
970106 Expanding Knowledge in the Biological Sciences
Formatted abstract
Although divergent natural selection is common in nature,
the extent to which genetic constraints bias evolutionary trajectories
in its presence remains largely unknown. Here we develop
a general framework to integrate estimates of divergent selection and
genetic constraints to estimate their contributions to phenotypic divergence
among natural populations. We apply these methods to
estimates of phenotypic selection and genetic covariance from sexually
selected traits that have undergone adaptive divergence among
nine natural populations of the fly Drosophila serrata. Despite ongoing
sexual selection within populations, differences in its direction
among them, and genetic variance for all traits in all populations,
divergent sexual selection only weakly resembled the observed pattern
of divergence. Accounting for the influence of genetic covariance
among the traits significantly improved the alignment between observed
and predicted divergence. Our results suggest that the direction
in which sexual selection generates divergence may depend on
the pattern of genetic constraint in individual populations, ultimately
restricting how sexually selected traits may diversify. More generally,
we show how evolution is likely to proceed in the direction of major
axes of genetic variance, rather than the direction of selection itself,
when genetic variance-covariance matrices are ill conditioned and
genetic variance is low in the direction of selection.
Keyword Microevolution
Quantitative genetics
Sexual selection
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Submitted May 28, 2009; Accepted September 9. 2009; Electronically published January 8, 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 53 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 31 Jan 2010, 00:07:22 EST