Facultative Sexual Reproduction Under Frequency-Dependent Selection on a Single Locus

Yamauchi, Atsushi; Kamite, Yukiko

doi:10.1006/jtbi.2003.3195

Cited by 10 publications

(10 citation statements)

References 27 publications

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“…Accordingly, the terms of equation (1) that represent outcrossing should be normalized to avoid an effect of pollen pool size on fertilization. This normalization has been considered in other theoretical papers that analyzed in-teractions between sexual and selfing or asexual modes in a single population (Nagylaki 1976;Charlesworth 1980;Holsinger et al 1984;Uyenoyama and Waller 1991;Yamauchi and Kamite 2003;Yamauchi et al 2004). Accordingly, equation (1) should be…”

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confidence: 99%

Formulation of Competition Between Sexual and Selfing Forms

Yamauchi¹

2006

Evol

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In a recent issue, Rausch and Morgan (2005) analyzed the role of selfing in the autopolyploidization process theoretically based on the formulation of Felber (1991), although they did not explicitly model a pollen pool. This paper reformulates the male contribution to outcrossing in terms of gamete frequencies within a pollen pool. This is a general issue when considering competition between sexual and selfing or asexual forms in a single population, which must be considered in theoretical treatments.

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Formulation of Competition Between Sexual and Selfing Forms

Yamauchi¹

2006

Evol

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“…Theory suggests that facultative strategies should outcompete obligate sex (Green & Noakes, ; Yamauchi & Kamite, ). Indeed, our simulations show that facultative parthenogenesis can spread via mate scarcity under a broad range of ecological and genetic conditions.…”

Section: Discussionmentioning

confidence: 99%

The paradox of obligate sex: The roles of sexual conflict and mate scarcity in transitions to facultative and obligate asexuality

Burke

Bonduriansky

2019

J of Evolutionary Biology

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The maintenance of obligate sex in animals is a long‐standing evolutionary paradox. To solve this puzzle, evolutionary models need to explain why obligately sexual populations consistently resist invasion by facultative strategies that combine the benefits of both sexual and asexual reproduction. Sexual antagonism and mate availability are thought to shape the occurrence of reproductive modes in facultative systems. But it is unclear how such factors interact with each other to influence facultative invasions and transitions to obligate asexuality. Using individual‐based models, we clarify how sexually antagonistic coevolution and mate availability affect the likelihood that a mutant allele that gives virgin females the ability to reproduce parthenogenetically will invade an obligately sexual population. We show that male coercion cannot stop the allele from spreading because mutants generally benefit by producing at least some offspring asexually prior to encountering males. We find that effects of sexual conflict can lead to positive frequency‐dependent dynamics, where the spread of the allele is promoted by effective (no‐cost) resistance when males are common, and by mate limitation when sex ratios are female‐biased. However, once the mutant allele fixes, effective coercion prevents the complete loss of sex unless linkage disequilibrium can build up between the allele and alleles for effective resistance. Our findings clarify how limitations of female resistance imposed by the genetic architecture of sexual antagonism can promote the maintenance of sexual reproduction. At the same time, our finding of widespread obligate sex when costs of parthenogenesis are high suggests that developmental constraints could contribute to the rarity of facultative reproductive strategies in nature.

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“…1993; Green and Noakes 1995; Hurst and Peck 1996; Corley et al. 2001; Hadany and Beker 2003a,b; Yamauchi and Kamite 2003; Hadany and Otto 2009; D’Souza and Michiels 2010)).…”

Section: Introductionmentioning

confidence: 99%

The evolution of obligate sex: the roles of sexual selection and recombination

Kleiman

Hadany

2015

Ecology and Evolution

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The evolution of sex is one of the greatest mysteries in evolutionary biology. An even greater mystery is the evolution of obligate sex, particularly when competing with facultative sex and not with complete asexuality. Here, we develop a stochastic simulation of an obligate allele invading a facultative population, where males are subject to sexual selection. We identify a range of parameters where sexual selection can contribute to the evolution of obligate sex: Especially when the cost of sex is low, mutation rate is high, and the facultative individuals do not reproduce sexually very often. The advantage of obligate sex becomes larger in the absence of recombination. Surprisingly, obligate sex can take over even when the population has a lower mean fitness as a result. We show that this is due to the high success of obligate males that can compensate the cost of sex.

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Facultative Sexual Reproduction Under Frequency-Dependent Selection on a Single Locus

Cited by 10 publications

References 27 publications

Formulation of Competition Between Sexual and Selfing Forms

Formulation of Competition Between Sexual and Selfing Forms

The paradox of obligate sex: The roles of sexual conflict and mate scarcity in transitions to facultative and obligate asexuality

The evolution of obligate sex: the roles of sexual selection and recombination

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