Sex increases the probability of evolutionary rescue in the presence of a competitor

@article{Petkovi2019SexIT,
  title={Sex increases the probability of evolutionary rescue in the presence of a competitor},
  author={Nikola Petkovi{\'c} and Nick Colegrave},
  journal={Journal of Evolutionary Biology},
  year={2019},
  volume={32},
  pages={1252 - 1261}
}
The explanation for the continued existence of sex, despite its many costs, remains one of the major challenges of evolutionary biology. Previous experimental studies have demonstrated that sex increases the rate of adaptation in novel environments relative to asexual reproduction. Whereas these studies have investigated the impact of sex on adaptation to stressful abiotic environments, the potential for biotic interactions to influence this advantage of sex has been largely ignored. Species… Expand
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References

SHOWING 1-10 OF 54 REFERENCES
Sex releases the speed limit on evolution
TLDR
It is shown that sex can increase the rate of adaptation in the facultatively sexual single-celled chlorophyte Chlamydomonas reinhardtii, but that the benefits of sex depend crucially on the size of the population that is adapting: sex has a marked effect in large populations but little effect in small populations. Expand
EVOLUTIONARY RESCUE OF SEXUAL AND ASEXUAL POPULATIONS IN A DETERIORATING ENVIRONMENT
TLDR
The evolutionary rescue events observed in this study provide evidence that major shifts in ways of life can arise within short time frames through the action of natural selection in sexual populations. Expand
Higher rates of sex evolve during adaptation to more complex environments
TLDR
It is shown that adaptation to different environments results in varying amounts of sex and, more importantly, that higher levels of sex evolve when adapting to more complex environments, which helps explain why so many natural populations maintain such high levels ofsex. Expand
Current hypotheses for the evolution of sex and recombination.
TLDR
Current theoretical and experimental evidence seems to favor the hypothesis that sex breaks down selection interference between new mutants, or it acts as a mechanism to shuffle genotypes in order to repel parasitic invasion, however, there is still a need to collect more data from natural populations and experimental studies, which can be used to test different hypotheses. Expand
Sex increases the efficacy of natural selection in experimental yeast populations
TLDR
It is shown that, as predicted by the theory, sex increases the rate of adaptation to a new harsh environment but has no measurable effect on fitness in a new benign environment where there is little selection. Expand
THE ECOLOGY AND GENETICS OF FITNESS IN CHLAMYDOMONAS. VIII. THE DYNAMICS OF ADAPTATION TO NOVEL ENVIRONMENTS AFTER A SINGLE EPISODE OF SEX
TLDR
Although recombination was not more effective on more complex substrates, these results generally support the idea that sex can accelerate adaptation to novel environments. Expand
Evolutionary rescue can prevent extinction following environmental change.
TLDR
It is shown that ER is possible, and that the recovery of the population may occur within 25 generations, and a clear threshold in population size is observed whereby the ancestral population size must be sufficiently large to counter stochastic extinction and contain resistant individuals. Expand
THE ECOLOGY AND GENETICS OF FITNESS IN CHLAMYDOMONAS. XII. REPEATED SEXUAL EPISODES INCREASE RATES OF ADAPTATION TO NOVEL ENVIRONMENTS
  • O. Kaltz, G. Bell
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 2002
TLDR
Results support the Weismann‐Fisher‐Muller hypothesis for the maintenance of sex in natural populations and suggest that directional selection used up the variation generated by meiotic recombination and thereby conferred a fitness advantage to the sexual lines. Expand
Mutation load and rapid adaptation favour outcrossing over self-fertilization
TLDR
It is shown that outcrossing is favoured in populations of Caenorhabditis elegans subject to experimental evolution both under conditions of increased mutation rate and during adaptation to a novel environment. Expand
The effect of sex on adaptation to high temperature in heterozygous and homozygous yeast
TLDR
It is found that there was an initial cost of sex for all the sexual strains, which was indicated by a sharp increase in the proportion of asexuals after the induction of sex. Expand
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