The Evolution of Sexually Antagonistic Phenotypes

Perry, Jennifer C.; Rowe, Locke

doi:10.1101/cshperspect.a017558

Cited by 45 publications

(53 citation statements)

References 130 publications

(179 reference statements)

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“…Even in the absence of a shared genetic architecture, both natural selection and neutral evolution might result in a pattern of correlated trait evolutionfor example, if either process generates population variation in one sex and the opposite sex then evolves in concertin contrast to true coevolution. Indeed, the relative contribution of the ecological setting in shaping the evolution of sexually antagonistic traits is a key and open question in the field (Arnqvist & Rowe 2005;Fricke et al 2009;Arbuthnott et al 2014;Perry & Rowe 2014;Anderson & Langerhans 2015).…”

Section: Introductionmentioning

confidence: 99%

The role of ecology, neutral processes and antagonistic coevolution in an apparent sexual arms race

2017

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Some of the strongest examples of a sexual 'arms race' come from observations of correlated evolution in sexually antagonistic traits among populations. However, it remains unclear whether these cases truly represent sexually antagonistic coevolution; alternatively, ecological or neutral processes might also drive correlated evolution. To investigate these alternatives, we evaluated the contributions of intersex genetic correlations, ecological context, neutral genetic divergence and sexual coevolution in the correlated evolution of antagonistic traits among populations of Gerris incognitus water striders. We could not detect intersex genetic correlations for these sexually antagonistic traits. Ecological variation was related to population variation in the key female antagonistic trait (spine length, a defence against males), as well as body size. Nevertheless, population covariation between sexually antagonistic traits remained substantial and significant even after accounting for all of these processes. Our results therefore provide strong evidence for a contemporary sexual arms race.

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Section: Introductionmentioning

confidence: 99%

The role of ecology, neutral processes and antagonistic coevolution in an apparent sexual arms race

2017

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“…Theory predicts that IaSC and IeSC are intricately linked (Arnqvist and Rowe 2005;Bonduriansky and Chenoweth 2009;Perry and Rowe 2014). IaSC could, for example, arise whenever IeSC over optimal mating rates spurs coevolution of interacting male and female reproductive traits that, to some extent, share a common genetic basis in the sexes.…”

Section: Introductionmentioning

confidence: 99%

Intralocus Sexual Conflict and the Tragedy of the Commons in Seed Beetles

Berger

Martinossi‐Allibert

Grieshop

et al. 2016

The American Naturalist

128

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Online enhancements: appendixes, supplemental PDF. Dryad data: http://dx.doi.org/10.5061/dryad.bc94c.abstract: The evolution of male traits that inflict direct harm on females during mating interactions can result in a so-called tragedy of the commons, where selfish male strategies depress population viability. This tragedy of the commons can be magnified by intralocus sexual conflict (IaSC) whenever alleles that reduce fecundity when expressed in females spread in the population because of their benefits in males. We evaluated this prediction by detailed phenotyping of 73 isofemale lines of the seed beetle Callosobruchus maculatus. We quantified genetic variation in life history and morphology, as well as associated covariance in male and female adult reproductive success. In parallel, we created replicated artificial populations of each line and measured their productivity. Genetic constraints limited independent trait expression in the sexes, and we identified several instances of sexually antagonistic covariance between traits and fitness, signifying IaSC. Population productivity was strongly positively correlated to female adult reproductive success but uncorrelated with male reproductive success. Moreover, male (female) phenotypic optima for several traits under sexually antagonistic selection were exhibited by the genotypes with the lowest (highest) population productivity. Our study forms a direct link between individuallevel sex-specific selection and population demography and places lifehistory traits at the epicenter of these dynamics.

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“…In isolation, the influence of all social behaviors on lifespan is eliminated. In same‐sex groups, individuals are able to engage in social interactions, but are not able to reproduce and females are not subject to sexual conflict/female harm, which in the case of flies is very significant (Wigby and Chapman ; Perry and Rowe ). Not surprisingly, we found that the mixed sexes group had a dramatic effect on female lifespan, which is expected given that reproduction (Fowler and Partridge ; Wigby and Chapman ) and exposure to males (Partridge and Fowler ) are both well‐known to decrease female lifespan in fruit flies.…”

Section: Discussionmentioning

confidence: 99%

The “unguarded-X” and the genetic architecture of lifespan: Inbreeding results in a potentially maladaptive sex-specific reduction of female lifespan inDrosophila melanogaster

2018

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Sex differences in ageing and lifespan are ubiquitous in nature. The "unguarded-X" hypothesis (UXh) suggests they may be partly due to the expression of recessive mutations in the hemizygous sex chromosomes of the heterogametic sex, which could help explain sex-specific ageing in a broad array of taxa. A prediction central to the UX hypothesis is that inbreeding will decrease the lifespan of the homogametic sex more than the heterogametic sex, because only in the former does inbreeding increase the expression of recessive deleterious mutations. In this study, we test this prediction by examining the effects of inbreeding on the lifespan and fitness of male and female Drosophila melanogaster across different social environments. We found that, across social environments, inbreeding resulted in a greater reduction of female than male lifespan, and that inbreeding effects on fitness did not seem to counterbalance sex-specific effects on lifespan, suggesting the former are maladaptative. Inter- and intra-sexual correlation analyses also allowed us to identify evidence of an underlying joint genetic architecture for inbreeding effects on lifespan. We discuss these results in light of the UXh and other alternative explanations, and suggest that more attention should be paid to the possibility that the "unguarded-X" may play an important role in the evolution of sex-specific lifespan.

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The Evolution of Sexually Antagonistic Phenotypes

Cited by 45 publications

References 130 publications

The role of ecology, neutral processes and antagonistic coevolution in an apparent sexual arms race

The role of ecology, neutral processes and antagonistic coevolution in an apparent sexual arms race

Intralocus Sexual Conflict and the Tragedy of the Commons in Seed Beetles

The “unguarded-X” and the genetic architecture of lifespan: Inbreeding results in a potentially maladaptive sex-specific reduction of female lifespan inDrosophila melanogaster

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