Female mating bias results in conflicting sex-specific offspring fitness

Fedorka, Kenneth M.; Mousseau, Timothy A.

doi:10.1038/nature02492

Cited by 189 publications

(159 citation statements)

References 12 publications

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“…Recent reviews suggest that sexually antagonistic selection may be common in natural populations (Cox and Calsbeek, 2009) and that the intersex genetic covariance for phenotypic traits is generally positive (Poissant et al, 2009), indicating considerable potential for ongoing intralocus conflict. Consistent with this, it is becoming increasingly clear that populations often harbor sexually antagonistic genetic variance for fitness (e.g., Chippindale et al, 2001;Fedorka and Mousseau, 2004;Pischedda and Chippindale, 2006;Qvarnström et al, 2006).…”

Section: Introductionmentioning

confidence: 85%

Comparing the intersex genetic correlation for fitness across novel environments in the fruit fly, Drosophila serrata

2013

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Sexually antagonistic genetic variation can pose limits to the independent evolution and adaptation of the sexes. The extent of sexually antagonistic variation is reflected in the intersex genetic correlation for fitness (r w FM ). Previous estimates of this correlation have been mostly limited to populations in environments to which they are already well adapted, making it difficult to gauge the importance of sexually antagonistic genetic variance during the early stages of adaptation, such as that occurring following abrupt environmental change or upon the colonization of new habitat. Here we assayed male and female lifetime fitness in a population of Drosophila serrata in four novel laboratory environments. We found that r w FM varied significantly across environments, with point estimates ranging from positive to negative values of considerable magnitude. We also found that the variability among estimates was because, at least in part, of significant differences among environments in the genetic variances of both male and female fitness, with no evidence of any significant changes in the intersex covariance itself, although standard errors of these estimates were large. Our results illustrate the unpredictable nature of r w FM in novel environments and suggest that, although sexually antagonistic genetic variance can be pronounced in some novel environments, it may have little effect in constraining the early stages of adaptation in others.

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Section: Introductionmentioning

confidence: 85%

Comparing the intersex genetic correlation for fitness across novel environments in the fruit fly, Drosophila serrata

2013

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“…Intralocus conflict is an interaction between a single gene or gene complex and the sex-specific genetic background, and can have dramatic effects on male and female fitness (Chippindale et al, 2001;Fedorka and Mousseau, 2004). The intensity of this conflict will be to some extent dictated by the strength of the genetic correlation for the homologous character undergoing dimorphic evolution.…”

Section: Discussionmentioning

confidence: 99%

The evolutionary genetics of sexual size dimorphism in the cricket Allonemobius socius

2007

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In recent years, investigations into the evolution of sexual size dimorphism have moved from a simple single trait, single sex perspective, to the more robust view of multivariate selection acting on both males and females. However, more accurate predictions regarding selection response may be possible if some knowledge of the underlying sex-specific genetic architecture exists. In the striped ground cricket, Allonemobius socius, females are the larger sex. Furthermore, body size appears to be closely associated with fitness in both males and females. Here, we investigate the role that genetic architecture may play in affecting this pattern. Employing a quantitative genetic approach, we estimated the sex-specific selection gradients and the (co)variance matrix for body size and wing morphology (that is, either a long-winged flight-capable phenotype or a short-winged flightless phenotype) to predict phenotypic change in the next generation. We found that the sexes differed significantly in their selection gradients as well as several of their genetic parameters. Our predictions of next-generation change indicated that the within-sex genetic correlations, as well as the between-sex genetic correlations, should play a significant role in sexually dimorphic evolution in this system. Specifically, the female size response was increased by approximately 178% when the between-sex genetic correlations were considered. Thus, our predictions reinforce the notion that genetic architecture can produce counterintuitive responses to selection, and suggest that even a complete knowledge of the selection pressures acting on a trait may misrepresent the trajectory of trait evolution.

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“…The lack of studies able to demonstrate such a trade-off is therefore perhaps rather surprising, but a possible explanation could be difficulties in measuring allocation [34]. Using a fitness-based perspective (such as in previous studies of intra-locus sexual conflict [11,13,53]) would mitigate these concerns about how to measure allocation and could make it easier to detect variation in allocation patterns due to sexually antagonistic genetic variation.…”

Section: Sex Allocation and Evolutionary Transitions In Simultaneous mentioning

confidence: 99%

Intra-locus sexual conflict and sexually antagonistic genetic variation in hermaphroditic animals

Abbott

2010

Proc. R. Soc. B.

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Intra-locus sexual conflict results when sex-specific selection pressures for a given trait act against the intra-sexual genetic correlation for that trait. It has been found in a wide variety of taxa in both laboratory and natural populations, but the importance of intra-locus sexual conflict and sexually antagonistic genetic variation in hermaphroditic organisms has rarely been considered. This is not so surprising given the conceptual and theoretical association of intra-locus sexual conflict with sexual dimorphism, but there is no a priori reason why intra-locus sexual conflict cannot occur in hermaphroditic organisms as well. Here, I discuss the potential for intra-locus sexual conflict in hermaphroditic animals and review the available evidence for such conflict, and for the existence of sexually antagonistic genetic variation in hermaphrodites. I argue that mutations with asymmetric effects are particularly likely to be important in mediating sexual antagonism in hermaphroditic organisms. Moreover, sexually antagonistic genetic variation is likely to play an important role in inter-individual variation in sex allocation and in transitions to and from gonochorism (separate sexes) in simultaneous hermaphrodites. I also describe how sequential hermaphrodites may experience a unique form of intra-locus sexual conflict via antagonistic pleiotropy. Finally, I conclude with some suggestions for further research.

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Female mating bias results in conflicting sex-specific offspring fitness

Cited by 189 publications

References 12 publications

Comparing the intersex genetic correlation for fitness across novel environments in the fruit fly, Drosophila serrata

Comparing the intersex genetic correlation for fitness across novel environments in the fruit fly, Drosophila serrata

The evolutionary genetics of sexual size dimorphism in the cricket Allonemobius socius

Intra-locus sexual conflict and sexually antagonistic genetic variation in hermaphroditic animals

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