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5 results for “Rate of asexuality”
Data from: Mutation rate evolution in partially selfing and partially asexual organisms
Different factors may influence the evolution of the mutation rate of a species: costs associated with DNA replication fidelity, indirect selection caused by the mutations produced (that should generally favor lower mutation rates, given that most mutations affecting fitness are deleterious) and genetic drift, that may render selection acting on weak mutators inefficient. In this paper, we use a two-locus model to compute the strength of indirect selection acting on a modifier locus that affects the mutation rate towards a deleterious allele at a second, linked locus, in a population undergoing partial selfing or partial clonality. The results show that uniparental reproduction increases the effect of indirect selection for lower mutation rates. Extrapolating to the case of a whole genome with many deleterious alleles and introducing a direct cost a DNA replication fidelity, the results can be used to compute the evolutionarily stable mutation rate U. In the absence of mutational bias towards higher U, the analytical prediction fits well with individual-based, multilocus simulation results. When such a bias is added into the simulations, however, genetic drift may lead to the maintenance of higher mutation rates, and this effect may be amplified in highly selfing or highly clonal populations due to their reduced effective population size.
Data from: The effect of population bottlenecks on mutation rate evolution in asexual populations
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Data from: Mutation rate evolution in partially selfing and partially asexual organisms
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Data from: Different diversification rates between sexual and asexual organisms
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Data from: Higher rate of tissue regeneration in polyploid asexual vs. diploid sexual freshwater snails
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