Local Adaptation and the Evolution of Female Choice

Holman, Luke

doi:10.1002/9781118912591.ch3

Cited by 21 publications

(13 citation statements)

References 75 publications

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“…We found some evidence that IASC can select for stronger female choice by helping to preserve genetic variation, as previously found for GEIs [11,12], though the effect was weak. Rather, female preference for high-condition males weakens as IASC intensifies (i.e.…”

Section: Discussionsupporting

confidence: 83%

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Evolution of female choice under intralocus sexual conflict and genotype-by-environment interactions

Holman

2018

Phil. Trans. R. Soc. B

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In many species, females are hypothesized to obtain 'good genes' for their offspring by mating with males in good condition. However, female preferences might deplete genetic variance and make choice redundant. Additionally, high-condition males sometimes produce low-fitness offspring, for example because of environmental turnover and gene-by-environment interactions (GEIs) for fitness, or because fit males carry sexually antagonistic alleles causing them to produce unfit daughters. Here, we extend previous theory by investigating the evolution of female mate choice in a spatially explicit evolutionary simulation implementing both GEIs and intralocus sexual conflict (IASC), under sex-specific hard or soft selection. We show that IASC can weaken female preferences for high-condition males or even cause a preference for males in low condition, depending on the relative benefits of producing well-adapted sons versus daughters, which in turn depends on the relative hardness of selection on males and females. We discuss the relevance of our results to conservation genetics and empirical evolutionary biology.This article is part of the theme issue 'Linking local adaptation with the evolution of sex differences'.

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Section: Discussionsupporting

confidence: 83%

“…Sexual selection models involving female choice typically assume that females either mate randomly or prefer mating with high-condition males if they are allowed to choose [12,41,42]. The assumption is appropriate if the relationship between genotype and fitness is concordant between the sexes.…”

Section: B Representing Female Preferences Using the Beta Functionmentioning

confidence: 99%

Evolution of female choice under intralocus sexual conflict and genotype-by-environment interactions

Holman

2018

Phil. Trans. R. Soc. B

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“…Additionally, an overall difference in the prevalence of female mate choice across environments may be partly responsible for the reduced strength of selection in males in maladapted populations, as suggested by previous empirical observations (Chaine and Lyon ; Gosden and Svensson ). For example, if male signals vary unpredictably with the environment, female choice for “good genes” may be disrupted in novel environments (Holman and Kokko ). As a consequence, both the direction and magnitude of sexual selection in males could change (Candolin and Heuschele ; Ingleby et al.…”

Section: Discussionmentioning

confidence: 99%

The consequences of sexual selection in well-adapted and maladapted populations of bean beetles†

et al. 2018

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Whether sexual selection generally promotes or impedes population persistence remains an open question. Intralocus sexual conflict (IaSC) can render sexual selection in males detrimental to the population by increasing the frequency of alleles with positive effects on male reproductive success but negative effects on female fecundity. Recent modeling based on fitness landscape theory, however, indicates that the relative impact of IaSC may be reduced in maladapted populations and that sexual selection therefore might promote adaptation when it is most needed. Here, we test this prediction using bean beetles that had undergone 80 generations of experimental evolution on two alternative host plants. We isolated and assessed the effect of maladaptation on sex-specific strengths of selection and IaSC by cross-rearing the two experimental evolution regimes on the alternative hosts and estimating within-population genetic (co)variance for fitness in males and females. Two key predictions were upheld: males generally experienced stronger selection compared to females and maladaptation increased selection in females. However, maladaptation consistently decreased male-bias in the strength of selection and IaSC was not reduced in maladapted populations. These findings imply that sexual selection can be disrupted in stressful environmental conditions, thus reducing one of the potential benefits of sexual reproduction in maladapted populations.

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“…At present it is not clear whether irregular occurrences of the Fisher process—and the resulting spikes in COV A in between migration events, or prior to and during episodes of runaway selection—would be sufficient to sustain exaggerated traits and preferences over the long term. The role of migration is now often considered in models of the sexual selection process (e.g., Getty ; Holman and Kokko ; Woolf et al ). Additionally, we note that several earlier models incorporating migration and environmental heterogeneity reported that these features would favor the evolution of mate choice by conserving the trait, and preference, V A that are necessary for sexual selection to function (Day ; Proulx ).…”

Section: Discussionmentioning

confidence: 99%

The dilemma of Fisherian sexual selection: Mate choice for indirect benefits despite rarity and overall weakness of trait-preference genetic correlation

et al. 2014

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Fisher's mechanism of sexual selection is a fundamental element of evolutionary theory. In it nonrandom mate choice causes a genetic covariance between a male trait and female preference for that trait and thereby generates a positive feedback process sustaining accelerated coevolution of the trait and preference. Numerous theoretical models of Fisher's mechanism have confirmed its mathematical underpinnings, yet biologists have often failed to find evidence for trait-preference genetic correlation in populations in which the mechanism was expected to function. We undertook a survey of the literature to conduct a formal meta-analysis probing the incidence and strength of trait-preference correlation among animal species. Our meta-analysis found significant positive genetic correlations in fewer than 20% of the species studied and an overall weighted correlation that is slightly positive. Importantly, a significant positive correlation was not found in any thorough study that included multiple subgroups. We discuss several ways in which the dynamic, multivariate nature of mate choice may reduce the trait-preference genetic correlation predicted by Fisher's mechanism. We then entertain the possibilities that Fisherian-like processes sometimes function without genetic correlation, and that mate choice may persist in a population as long as genetic correlation, and therefore Fisher's mechanism, occurs intermittently. Fisher's mechanism of sexual selection (Fisher 1915(Fisher , 1930(Fisher , 1958 has dominated biological thought on the genetics of mate choice over the past 40 years. The mechanism is central to most sexual selection models (Prum 2010) and has been formally modeled on numerous occasions beginning in the early 1980s (O'Donald

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Local Adaptation and the Evolution of Female Choice

Cited by 21 publications

References 75 publications

Evolution of female choice under intralocus sexual conflict and genotype-by-environment interactions

Evolution of female choice under intralocus sexual conflict and genotype-by-environment interactions

The consequences of sexual selection in well-adapted and maladapted populations of bean beetles†

The dilemma of Fisherian sexual selection: Mate choice for indirect benefits despite rarity and overall weakness of trait-preference genetic correlation

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