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• W1989752449 endingPage "e11186" @default.
• W1989752449 startingPage "e11186" @default.
• W1989752449 abstract "For evolving populations of replicators, there is much evidence that the effect of mutations on fitness depends on the degree of adaptation to the selective pressures at play. In optimized populations, most mutations have deleterious effects, such that low mutation rates are favoured. In contrast to this, in populations thriving in changing environments a larger fraction of mutations have beneficial effects, providing the diversity necessary to adapt to new conditions. What is more, non-adapted populations occasionally benefit from an increase in the mutation rate. Therefore, there is no optimal universal value of the mutation rate and species attempt to adjust it to their momentary adaptive needs. In this work we have used stationary populations of RNA molecules evolving in silico to investigate the relationship between the degree of adaptation of an optimized population and the value of the mutation rate promoting maximal adaptation in a short time to a new selective pressure. Our results show that this value can significantly differ from the optimal value at mutation-selection equilibrium, being strongly influenced by the structure of the population when the adaptive process begins. In the short-term, highly optimized populations containing little variability respond better to environmental changes upon an increase of the mutation rate, whereas populations with a lower degree of optimization but higher variability benefit from reducing the mutation rate to adapt rapidly. These findings show a good agreement with the behaviour exhibited by actual organisms that replicate their genomes under broadly different mutation rates." @default.
• W1989752449 created "2016-06-24" @default.
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• W1989752449 date "2010-06-17" @default.
• W1989752449 modified "2023-10-18" @default.
• W1989752449 title "Variable Mutation Rates as an Adaptive Strategy in Replicator Populations" @default.
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• W1989752449 doi "https://doi.org/10.1371/journal.pone.0011186" @default.
• W1989752449 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2887357" @default.
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• W1989752449 hasPublicationYear "2010" @default.
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