On the Role of Stress in Evolution

Hadany, Lilach

doi:10.1002/9783527628346.ch1

Cited by 2 publications

(2 citation statements)

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“…However, rates of sex and recombination can vary between individuals. In particular, stressful conditions have been shown to affect the frequency of sexual reproduction in many organisms, including complete shifts from asexual to sexual reproduction (Kleiven et al, 1992;Mai & Breeden, 2000;Rautiainen et al, 2004;Foster, 2005), and elevated levels of recombination (Plough, 1917;Belyaev & Borodin, 1982;Kupiec, 2000;Abdullah & Borts, 2001; see Hadany &Otto, 2009, andHadany, 2009, for a more comprehensive list of studies). Mathematical and computer simulation models of single-species systems have shown that even in the presence of substantial fitness costs, condition-dependent sex typically evolves much easier than condition-independent sex (Redfield, 1988;Gessler & Xu, 2000;Hadany & Beker, 2003;Hadany & Otto, 2009), and this is true in both haploid and diploid species (Hadany & Otto, 2007).…”

Section: Introductionmentioning

confidence: 99%

Host–parasite coevolution induces selection for condition‐dependent sex

Mostowy

Engelstädter

2012

J of Evolutionary Biology

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Sex and recombination remain one of the biggest riddles of evolutionary biology. One of the most prominent hypotheses, the Red Queen Hypothesis, claims that sex has evolved as a means to efficiently create genotypes that are resistant against coevolving parasites. However, previous models of the Red Queen have assumed that all individuals are equally likely to engage in sexual reproduction, regardless of their infection status, an assumption that may not be true in reality. Here, we consider a population genetic model of a host population coevolving with a parasite population, where the parasites are haploid and the hosts either haploid or diploid. We assume that the probability to engage in sex may be different in infected and uninfected hosts and ascertain the success of different reproductive strategies with a modifier-gene approach. Our model shows that in the large majority of the parameter space, infection-dependent sex is more successful than infectionindependent sex. We identify at least two reasons for this: (i) an immediate short-term advantage of breaking-down gene combinations of unfit individuals and (ii) a selfish spread of the condition-dependent modifiers, in analogy to the 'abandon-ship' effect in single species. In diploids, these effects are often powerful enough to overcome the detrimental effects of segregation. These results raise the intriguing question of why infection-induced sex is not more commonly observed in nature.

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Section: Introductionmentioning

confidence: 99%

Host–parasite coevolution induces selection for condition‐dependent sex

Mostowy

Engelstädter

2012

J of Evolutionary Biology

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“…Despite the common recognition of stress as a powerful evolutionary force, [89][90][91][92] theoretical studies addressing the evolution of ecological plasticity of recombination remain very limited. Although many classical theoretical models did examine changing environments as a "substrate" for the evolution of recombination (reviewed in ref.…”

Section: Models Assuming Recombination Plasticity In Response To Envi...mentioning

confidence: 99%

Modeling the evolution of recombination plasticity: A prospective review

et al. 2023

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Meiotic recombination is one of the main sources of genetic variation, a fundamental factor in the evolutionary adaptation of sexual eukaryotes. Yet, the role of variation in recombination rate and other recombination features remains underexplored. In this review, we focus on the sensitivity of recombination rates to different extrinsic and intrinsic factors. We briefly present the empirical evidence for recombination plasticity in response to environmental perturbations and/or poor genetic background and discuss theoretical models developed to explain how such plasticity could have evolved and how it can affect important population characteristics. We highlight a gap between the evidence, which comes mostly from experiments with diploids, and theory, which typically assumes haploid selection. Finally, we formulate open questions whose solving would help to outline conditions favoring recombination plasticity. This will contribute to answering the long‐standing question of why sexual recombination exists despite its costs, since plastic recombination may be evolutionary advantageous even in selection regimes rejecting any non‐zero constant recombination.

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On the Role of Stress in Evolution

Cited by 2 publications

References 97 publications

Host–parasite coevolution induces selection for condition‐dependent sex

Host–parasite coevolution induces selection for condition‐dependent sex

Modeling the evolution of recombination plasticity: A prospective review

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