The evolutionary stability of cross-sex, cross-trait genetic covariances
(2014) In Evolution 68(6). p.1687-1697- Abstract
- Although knowledge of the selective agents behind the evolution of sexual dimorphism has advanced considerably in recent years, we still lack a clear understanding of the evolutionary durability of cross-sex genetic covariances that often constrain its evolution. We tested the relative stability of cross-sex genetic covariances for a suite of homologous contact pheromones of the fruit fly Drosophila serrata, along a latitudinal gradient that these traits have diverged in mean. Using a Bayesian framework, which allowed us to account for uncertainty in all parameter estimates, we compared divergence in the total amounts and orientations of genetic variance across populations, finding divergence in orientation but not total variance. We then... (More)
- Although knowledge of the selective agents behind the evolution of sexual dimorphism has advanced considerably in recent years, we still lack a clear understanding of the evolutionary durability of cross-sex genetic covariances that often constrain its evolution. We tested the relative stability of cross-sex genetic covariances for a suite of homologous contact pheromones of the fruit fly Drosophila serrata, along a latitudinal gradient that these traits have diverged in mean. Using a Bayesian framework, which allowed us to account for uncertainty in all parameter estimates, we compared divergence in the total amounts and orientations of genetic variance across populations, finding divergence in orientation but not total variance. We then statistically compared orientation divergence of within-sex (G) to cross-sex (B) covariance matrices. In line with a previous theoretical prediction, we find that the cross-sex covariance matrix, B, is more variable than either male or female within-sex covariance matrix. Decomposition of B matrices into their symmetrical and non-symmetrical components revealed that instability is linked to the degree of asymmetry. We also find that the degree of asymmetry correlates with latitude suggesting a role for spatially varying natural selection in shaping genetic constraints on the evolution of sexual dimorphism. This article is protected by copyright. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4383451
- author
- Gosden, Thomas LU and Chenoweth, Stephen F
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Evolution
- volume
- 68
- issue
- 6
- pages
- 1687 - 1697
- publisher
- Wiley-Blackwell
- external identifiers
-
- pmid:24620712
- wos:000337558900012
- scopus:84901692771
- pmid:24620712
- ISSN
- 1558-5646
- DOI
- 10.1111/evo.12398
- language
- English
- LU publication?
- yes
- id
- 5dfe82b7-2c41-4185-938d-5d0ff01fab34 (old id 4383451)
- date added to LUP
- 2016-04-01 10:55:55
- date last changed
- 2022-02-02 22:19:04
@article{5dfe82b7-2c41-4185-938d-5d0ff01fab34,
abstract = {{Although knowledge of the selective agents behind the evolution of sexual dimorphism has advanced considerably in recent years, we still lack a clear understanding of the evolutionary durability of cross-sex genetic covariances that often constrain its evolution. We tested the relative stability of cross-sex genetic covariances for a suite of homologous contact pheromones of the fruit fly Drosophila serrata, along a latitudinal gradient that these traits have diverged in mean. Using a Bayesian framework, which allowed us to account for uncertainty in all parameter estimates, we compared divergence in the total amounts and orientations of genetic variance across populations, finding divergence in orientation but not total variance. We then statistically compared orientation divergence of within-sex (G) to cross-sex (B) covariance matrices. In line with a previous theoretical prediction, we find that the cross-sex covariance matrix, B, is more variable than either male or female within-sex covariance matrix. Decomposition of B matrices into their symmetrical and non-symmetrical components revealed that instability is linked to the degree of asymmetry. We also find that the degree of asymmetry correlates with latitude suggesting a role for spatially varying natural selection in shaping genetic constraints on the evolution of sexual dimorphism. This article is protected by copyright. All rights reserved.}},
author = {{Gosden, Thomas and Chenoweth, Stephen F}},
issn = {{1558-5646}},
language = {{eng}},
number = {{6}},
pages = {{1687--1697}},
publisher = {{Wiley-Blackwell}},
series = {{Evolution}},
title = {{The evolutionary stability of cross-sex, cross-trait genetic covariances}},
url = {{http://dx.doi.org/10.1111/evo.12398}},
doi = {{10.1111/evo.12398}},
volume = {{68}},
year = {{2014}},
}