CONSTRAINTS ON THE EVOLUTION OF MALES AND SEXUAL DIMORPHISM: FIELD ESTIMATES OF GENETIC ARCHITECTURE OF REPRODUCTIVE TRAITS IN THREE POPULATIONS OF GYNODIOECIOUS FRAGARIA VIRGINIANA

@inproceedings{Ashman2003CONSTRAINTSOT,
  title={CONSTRAINTS ON THE EVOLUTION OF MALES AND SEXUAL DIMORPHISM: FIELD ESTIMATES OF GENETIC ARCHITECTURE OF REPRODUCTIVE TRAITS IN THREE POPULATIONS OF GYNODIOECIOUS FRAGARIA VIRGINIANA},
  author={T. Ashman},
  year={2003}
}
To understand how genetic constraints may limit the evolution of males and sexual dimorphism in a gynodioecious species, I conducted a quantitative genetic experiment in a gynodioecious wild strawberry, Fragaria virginiana. I estimated and compared genetic parameters (narrow-sense heritabilities, between-trait and between-sex genetic correlations, as well as phenotypic and genetic variance-covariance matrices) in the two sex morphs from three populations grown in a common field garden. I… Expand
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TLDR
No evidence of negative genetic correlations appeared that would suggest trade‐offs and that could augment a selection response towards sexual specialization were found, suggesting that selection might not be able to act independently on biomass allocation to male and female flower parts. Expand
RESPONSES OF FLORAL TRAITS TO SELECTION ON PRIMARY SEXUAL INVESTMENT IN SPERGULARIA MARINA: THE BATTLE BETWEEN THE SEXES
TLDR
The observed direct and correlated responses to selection on male and female gamete production revealed significant heritabilities of both ovule and anther production per flower and a significant negative genetic correlation between them. Expand
Determinants of sex allocation in a gynodioecious wild strawberry: implications for the evolution of dioecy and sexual dimorphism
TLDR
Analysis of sex allocation in Fragaria virginiana finds significant broad‐sense heritabilities for all traits, suggesting that plants could respond to selection and that females’ seed fitness relative to that of hermaphrodites may be strongly environment‐dependent in this species. Expand
EVOLUTION OF FLORAL TRAITS IN A HERMAPHRODITIC PLANT: FIELD MEASUREMENTS OF HERITABILITIES AND GENETIC CORRELATIONS
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TLDR
One trait, corolla width, showed the potential for a rapid response to ongoing selection through male function, as it experienced both direct selection, by influencing pollen export, and relatively high heritability. Expand
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The high heritabilities of the traits examined as well as the genetic correlations among them indicate the potential for the evolution of gender specialization in this species, because flower size and number have the potential to affect sex-specific reproductive success. Expand
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Sexual allocation theory assumes trade-offs and negative genetic correlations between male and female allocation in hermaphrodite plants. We tested this assumption by studying variation in male andExpand
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