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The B-matrix harbors significant and sex-specific constraints on the evolution of multicharacter sexual dimorphism.

Gosden, Thomas LU ; Shastri, Krishna-Lila; Innocenti, Paolo and Chenoweth, Stephen F (2012) In Evolution 66(7). p.2106-2116
Abstract
The extent to which sexual dimorphism can evolve within a population depends on an interaction between sexually divergent selection and constraints imposed by a genetic architecture that is shared between males and females. The degree of constraint within a population is normally inferred from the intersexual genetic correlation, r(mf) . However, such bivariate correlations ignore the potential constraining effect of genetic covariances between other sexually coexpressed traits. Using the fruit fly Drosophila serrata, a species that exhibits mutual mate preference for blends of homologous contact pheromones, we tested the impact of between-sex between-trait genetic covariances using an extended version of the genetic variance-covariance... (More)
The extent to which sexual dimorphism can evolve within a population depends on an interaction between sexually divergent selection and constraints imposed by a genetic architecture that is shared between males and females. The degree of constraint within a population is normally inferred from the intersexual genetic correlation, r(mf) . However, such bivariate correlations ignore the potential constraining effect of genetic covariances between other sexually coexpressed traits. Using the fruit fly Drosophila serrata, a species that exhibits mutual mate preference for blends of homologous contact pheromones, we tested the impact of between-sex between-trait genetic covariances using an extended version of the genetic variance-covariance matrix, G, that includes Lande's (1980) between-sex covariance matrix, B. We find that including B greatly reduces the degree to which male and female traits are predicted to diverge in the face of divergent phenotypic selection. However, the degree to which B alters the response to selection differs between the sexes. The overall rate of male trait evolution is predicted to decline, but its direction remains relatively unchanged, whereas the opposite is found for females. We emphasize the importance of considering the B-matrix in microevolutionary studies of constraint on the evolution of sexual dimorphism. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cuticular hydrocarbons, Drosophila serrata, intersexual genetic correlation, multivariate breeders equation, sexually antagonistic selection
in
Evolution
volume
66
issue
7
pages
2106 - 2116
publisher
Wiley-Blackwell
external identifiers
  • wos:000305945400009
  • pmid:22759288
  • scopus:84863426871
ISSN
1558-5646
DOI
10.1111/j.1558-5646.2012.01579.x
language
English
LU publication?
yes
id
261b125f-3100-4f36-b949-9a39e851936a (old id 2967524)
date added to LUP
2012-09-05 14:04:07
date last changed
2017-11-12 03:07:31
@article{261b125f-3100-4f36-b949-9a39e851936a,
  abstract     = {The extent to which sexual dimorphism can evolve within a population depends on an interaction between sexually divergent selection and constraints imposed by a genetic architecture that is shared between males and females. The degree of constraint within a population is normally inferred from the intersexual genetic correlation, r(mf) . However, such bivariate correlations ignore the potential constraining effect of genetic covariances between other sexually coexpressed traits. Using the fruit fly Drosophila serrata, a species that exhibits mutual mate preference for blends of homologous contact pheromones, we tested the impact of between-sex between-trait genetic covariances using an extended version of the genetic variance-covariance matrix, G, that includes Lande's (1980) between-sex covariance matrix, B. We find that including B greatly reduces the degree to which male and female traits are predicted to diverge in the face of divergent phenotypic selection. However, the degree to which B alters the response to selection differs between the sexes. The overall rate of male trait evolution is predicted to decline, but its direction remains relatively unchanged, whereas the opposite is found for females. We emphasize the importance of considering the B-matrix in microevolutionary studies of constraint on the evolution of sexual dimorphism.},
  author       = {Gosden, Thomas and Shastri, Krishna-Lila and Innocenti, Paolo and Chenoweth, Stephen F},
  issn         = {1558-5646},
  keyword      = {Cuticular hydrocarbons,Drosophila serrata,intersexual genetic correlation,multivariate breeders equation,sexually antagonistic selection},
  language     = {eng},
  number       = {7},
  pages        = {2106--2116},
  publisher    = {Wiley-Blackwell},
  series       = {Evolution},
  title        = {The B-matrix harbors significant and sex-specific constraints on the evolution of multicharacter sexual dimorphism.},
  url          = {http://dx.doi.org/10.1111/j.1558-5646.2012.01579.x},
  volume       = {66},
  year         = {2012},
}