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Adaptation is maintained by the parliament of genes

Author

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  • Thomas W. Scott

    (University of Oxford)

  • Stuart A. West

    (University of Oxford)

Abstract

Fields such as behavioural and evolutionary ecology are built on the assumption that natural selection leads to organisms that behave as if they are trying to maximise their fitness. However, there is considerable evidence for selfish genetic elements that change the behaviour of individuals to increase their own transmission. How can we reconcile this contradiction? Here we show that: (1) when selfish genetic elements have a greater impact at the individual level, they are more likely to be suppressed, and suppression spreads more quickly; (2) selection on selfish genetic elements leads them towards a greater impact at the individual level, making them more likely to be suppressed; (3) the majority interest within the genome generally prevails over ‘cabals’ of a few genes, irrespective of genome size, mutation rate and the sophistication of trait distorters. Overall, our results suggest that even when there is the potential for considerable genetic conflict, this will often have negligible impact at the individual level.

Suggested Citation

  • Thomas W. Scott & Stuart A. West, 2019. "Adaptation is maintained by the parliament of genes," Nature Communications, Nature, vol. 10(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13169-3
    DOI: 10.1038/s41467-019-13169-3
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    Cited by:

    1. Brud, Evgeny, 2022. "Adaptive meiotic drive in selfing populations with heterozygote advantage," Theoretical Population Biology, Elsevier, vol. 146(C), pages 61-70.

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