7 Works

Data from: Sexually antagonistic genetic variance for fitness in an ancestral and a novel environment

Matthieu Delcourt, Mark W. Blows & Howard D. Rundle
The intersex genetic correlation for fitness (rwfm), a standardized measure of the degree to which male and female fitness covary genetically, has consequences for important evolutionary processes, but few estimates are available and none have explored how it changes with environment. Using a half-sibling breeding design, we estimated the genetic (co)variance matrix (G) for male and female fitness, and the resulting rwfm,in Drosophila serrata. Our estimates were performed in two environments: the laboratory yeast food...

Data from: Quantitative genetics of female mate preferences in an ancestral and a novel environment

Matthieu Delcourt, Mark W. Blows & Howard D. Rundle
A female’s mate preference is a potentially complex function relating variation in multiple male phenotypes with her probability of accepting individual males as a mate. Estimating the quantitative genetic basis of preference functions within a population is empirically challenging yet key to understanding preference evolution. We employed a recently described approach that uses random-coefficient mixed models in the analysis of function-valued traits. Using a half-sibling breeding design in a laboratory-adapted Drosophila serrata population, we estimated...

Data from: Reduced genetic variance among high fitness individuals: inferring stabilizing selection on male sexual displays in D. serrata

Jacqueline L. Sztepanacz & Howard D. Rundle
Directional selection is prevalent in nature yet phenotypes tend to remain relatively constant, suggesting a limit to trait evolution. However, the genetic basis of this limit is unresolved. Given widespread pleiotropy, opposing selection on a trait may arise from the effects of the underlying alleles on other traits under selection, generating net stabilizing selection on trait genetic variance. These pleiotropic costs of trait exaggeration may arise through any number of other traits, making them hard...

Data from: Sexual selection is ineffectual or inhibits the purging of deleterious mutations in Drosophila melanogaster

Devin Arbuthnott & Howard D. Rundle
The effects of sexual selection on population mean fitness are unclear and a subject of debate. Recent models propose that, because reproductive success may be condition-dependent, much of the genome may be a target of sexual selection. Under this scenario, mutations that reduce health, and thus non-sexual fitness, may also be deleterious with respect to reproductive success, meaning that sexual selection may contribute to the purging of deleterious alleles. We tested this hypothesis directly by...

Data from: Evolutionary optimum for male sexual traits characterized using the multivariate Robertson–Price Identity

Matthieu Delcourt, Mark W. Blows, J. David Aguirre & Howard D. Rundle
Phenotypes tend to remain relatively constant in natural populations, suggesting a limit to trait evolution. Although stationary phenotypes suggest stabilizing selection, directional selection is more commonly reported. However, selection on phenotypes will have no evolutionary consequence if the traits do not genetically covary with fitness, a covariance known as the Robertson–Price Identity. The nature of this genetic covariance determines if phenotypes will evolve directionally or whether they reside at an evolutionary optimum. Here, we show...

Data from: Correlated evolution of mating system and floral display traits in flowering plants and its implications for the distribution of mating system variation

Carol Goodwillie, Risa D. Sargent, Susan Kalisz, Richard H. Ree, David A. Moeller, Mario Vallejo-Marin, Christopher G. Eckert, Alice A. Winn, Elizabeth Elle, Monica A. Geber & Mark O. Johnston
Reduced allocation to structures for pollinator attraction is predicted in selfing species. We explored the association between outcrossing and floral display in a broad sample of angiosperms. We used the demonstrated relationship to test for bias against selfing species in the outcrossing rate distribution, the shape of which has relevance for the stability of mixed mating. Relationships between outcrossing rate, flower size, flower number and floral display, measured as the product of flower size and...

Data from: A phylogenetic analysis of trait convergence in the spring flora

Lisa E. Hensel & Risa D. Sargent
In temperate deciduous forests, spring flowering plants exhibit remarkable similarity in a number of characteristics, including reproductive, vegetative, and ecological traits. The apparent convergence of floral traits, especially corolla colour, among spring flowering species has been well documented, but remains poorly understood. Here we review adaptive hypotheses and predictions that have been proposed to explain the apparent correlation between spring flowering and a suite of traits. We investigated the correlation between flowering phenology (i.e., spring...

Registration Year

  • 2012
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Resource Types

  • Dataset
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Affiliations

  • University of Ottawa
    7
  • University of Queensland
    3
  • Field Museum of Natural History
    1
  • Department of Plant Biology
    1
  • University of Pittsburgh
    1
  • Dalhousie University
    1
  • East Carolina University
    1
  • Simon Fraser University
    1
  • Queen's University
    1
  • University of Stirling
    1