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• W1544431211 startingPage "104" @default.
• W1544431211 abstract "The rate and fitness effects of new mutations have been investigated by mutation accumulation (MA) experiments in which organisms are maintained at a constant minimal population size to facilitate the accumulation of mutations with minimal efficacy of selection. We evolved 35 MA lines of Caenorhabditis elegans in parallel for 409 generations at three population sizes (N = 1, 10, and 100), representing the first spontaneous long‐term MA experiment at varying population sizes with corresponding differences in the efficacy of selection. Productivity and survivorship in the N = 1 lines declined by 44% and 12%, respectively. The average effects of deleterious mutations in N = 1 lines are estimated to be 16.4% for productivity and 11.8% for survivorship. Larger populations (N = 10 and 100) did not suffer a significant decline in fitness traits despite a lengthy and sustained regime of consecutive bottlenecks exceeding 400 generations. Together, these results suggest that fitness decline in very small populations is dominated by mutations with large deleterious effects. It is possible that the MA lines at larger population sizes contain a load of cryptic deleterious mutations of small to moderate effects that would be revealed in more challenging environments." @default.
• W1544431211 created "2016-06-24" @default.
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• W1544431211 date "2014-12-09" @default.
• W1544431211 modified "2023-09-27" @default.
• W1544431211 title "Fitness decline in spontaneous mutation accumulation lines of<i>Caenorhabditis elegans</i>with varying effective population sizes" @default.
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• W1544431211 doi "https://doi.org/10.1111/evo.12554" @default.
• W1544431211 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25338758" @default.
• W1544431211 hasPublicationYear "2014" @default.
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