10.5061/DRYAD.7F912
Gosden, Thomas P.
University of Queensland
Lund University
Chenoweth, Stephen F.
University of Queensland
Data from: The evolutionary stability of cross-sex, cross-trait genetic
covariances
Dryad
dataset
2014
Drosophila serrata
2014-02-27T15:25:38Z
2014-02-27T15:25:38Z
en
https://doi.org/10.1111/evo.12398
759808 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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.
CHC data for nine populations of D.serrataSix log contrast values from the
CHC profiles of males and females from nine D.serrata populations,
spanning the east coast of Australia. Lc1: 5,9-C24:2 Lc2: 5,9-C25:2 Lc3:
9-C25:1 Lc5: 2-Me-C26 Lc7: 2-Me-C28 Lc8: 5,9-C29:2stability_B_serrata.xls
Australia