Genetic Variation in Male and Female Reproductive Characters Associated with Sexual Conflict in Drosophila melanogaster

Friberg, Urban

doi:10.1007/s10519-004-1246-8

Cited by 25 publications

(25 citation statements)

References 61 publications

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“…; Chaine and Lyon ; Roulin and Salamin ; Botero and Rubenstein ). Given that there is extensive variation in male harm and resistance to male harm, male behavior is likely to also play an important role in context‐specific differences in selection (Friberg ; Fiumera and Dumont ; Gay et al. ).…”

Section: Discussionmentioning

confidence: 99%

Social effects for locomotion vary between environments inDrosophila melanogasterfemales

et al. 2017

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Despite strong purifying or directional selection, variation is ubiquitous in populations. One mechanism for the maintenance of variation is indirect genetic effects (IGEs), as the fitness of a given genotype will depend somewhat on the genes of its social partners. IGEs describe the effect of genes in social partners on the expression of the phenotype of a focal individual. Here, we ask what effect IGEs, and variation in IGEs between abiotic environments, has on locomotion in Drosophila. This trait is known to be subject to intralocus sexually antagonistic selection. We estimate the coefficient of interaction, Ψ, using six inbred lines of Drosophila. We found that Ψ varied between abiotic environments, and that it may vary across among male genotypes in an abiotic environment specific manner. We also found evidence that social effects of males alter the value of a sexually dimorphic trait in females, highlighting an interesting avenue for future research into sexual antagonism. We conclude that IGEs are an important component of social and sexual interactions and that they vary between individuals and abiotic environments in complex ways, with the potential to promote the maintenance of phenotypic variation.

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Section: Discussionmentioning

confidence: 99%

Social effects for locomotion vary between environments inDrosophila melanogasterfemales

et al. 2017

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“…Female D. melanogaster suffer direct costs when mated with attractive males [82], and may attempt to reduce these costs by “resisting” copulation with attractive (and presumably harmful) males [83]. Females stimulated into mating with attractive males have an increased short-term fecundity, but decreased overall lifetime reproductive success [55,84], whereas females stimulated into mating with unattractive males may suffer immediate fitness costs, but benefit long term by reduced personal harm and potentially higher quality offspring [85].…”

Section: Discussionmentioning

confidence: 99%

Hemiclonal analysis of interacting phenotypes in male and female Drosophila melanogaster

2014

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BackgroundIdentifying the sources of variation in mating interactions between males and females is important because this variation influences the strength and/or the direction of sexual selection that populations experience. While the origins and effects of variation in male attractiveness and ornamentation have received much scrutiny, the causes and consequences of intraspecific variation in females have been relatively overlooked. We used cytogenetic cloning techniques developed for Drosophila melanogaster to create “hemiclonal” males and females with whom we directly observed sexual interaction between individuals of different known genetic backgrounds and measured subsequent reproductive outcomes. Using this approach, we were able to quantify the genetic contribution of each mate to the observed phenotypic variation in biologically important traits including mating speed, copulation duration, and subsequent offspring production, as well as measure the magnitude and direction of intersexual genetic correlation between female choosiness and male attractiveness.ResultsWe found significant additive genetic variation contributing to mating speed that can be attributed to male genetic identity, female genetic identity, but not their interaction. Furthermore we found that phenotypic variation in copulation duration had a significant male-associated genetic component. Female genetic identity and the interaction between male and female genetic identity accounted for a substantial amount of the observed phenotypic variation in egg size. Although previous research predicts a trade-off between egg size and fecundity, this was not evident in our results. We found a strong negative genetic correlation between female choosiness and male attractiveness, a result that suggests a potentially important role for sexually antagonistic alleles in sexual selection processes in our population.ConclusionThese results further our understanding of sexual selection because they identify that genetic identity plays a significant role in phenotypic variation in female behaviour and fecundity. This variation may be potentially due to ongoing sexual conflict found between the sexes for interacting phenotypes. Our unexpected observation of a negative correlation between female choosiness and male attractiveness highlights the need for more explicit theoretical models of genetic covariance to investigate the coevolution of female choosiness and male attractiveness.

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“…The extent to which this trait is heritable will therefore have important consequences for the rate and/or trajectory of inter-sexual coevolution. Despite its importance, only a handful of attempts have been made to determine if there is additive genetic variance for male-induced harm [12][13][14]. Additionally, these studies have been limited in several ways.…”

Section: Introductionmentioning

confidence: 99%

Genetic variation in male-induced harm in Drosophila melanogaster

Filice¹,

Long²

2016

Biol. Lett.

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In Drosophila melanogaster, prolonged exposure to males reduces the longevity and fecundity of females. This harm arises from the effects of male courtship behaviours and the toxic side effects of the accessory gland proteins (Acps) in their seminal fluids. Here, we examine the relationship between male exposure and its harmful effect on the lifetime fitness of his mates, and quantify the genetic basis for this variation. We found significant additive genetic variation in the magnitude of harm that males impose on females by exposing females to males from a variety of hemiclonal backgrounds for either a brief or prolonged period of time and measuring their fecundity, a meaningful fitness index. Furthermore, we discovered a strong negative correlation between the magnitude of harm and the short-term effects of male exposure on female fitness. We discuss the evolutionary significance of these results with regards to potential life-history trade-offs in females, and its relationship to male body size.

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Genetic Variation in Male and Female Reproductive Characters Associated with Sexual Conflict in Drosophila melanogaster

Cited by 25 publications

References 61 publications

Social effects for locomotion vary between environments inDrosophila melanogasterfemales

Social effects for locomotion vary between environments inDrosophila melanogasterfemales

Hemiclonal analysis of interacting phenotypes in male and female Drosophila melanogaster

Genetic variation in male-induced harm in Drosophila melanogaster

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