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Epistasis-Induced Evolutionary Plateaus in Selection Responses.

Arnaud Le Rouzic, José M Álvarez-Castro

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    Summary
    This summary is machine-generated.

    Gene-gene interactions, or epistasis, can cause temporary evolutionary plateaus. This genetic variation release phenomenon can be observed in populations undergoing natural or artificial selection.

    Keywords:
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    Area of Science:

    • Population genetics
    • Quantitative genetics
    • Evolutionary biology

    Background:

    • Understanding evolutionary trajectories is a key challenge.
    • Genetic variance for quantitative traits influences evolutionary response.
    • Gene-gene interactions (epistasis) are increasingly recognized as important evolutionary factors.

    Purpose of the Study:

    • To explore how epistasis can lead to evolutionary plateaus.
    • To investigate the release of cryptic genetic variation after plateaus.
    • To provide theoretical and empirical evidence for microevolutionary plateaus.

    Main Methods:

    • Theoretical modeling of epistatic interactions and selection response.
    • Computer simulations under empirically relevant conditions.
    • Analysis of artificial selection experiments.

    Main Results:

    • Epistasis can generate temporary decelerations (plateaus) in evolutionary response.
    • These plateaus are followed by the release of previously hidden genetic variation.
    • Simulations and experimental data support the occurrence of these microevolutionary plateaus.

    Conclusions:

    • Epistasis plays a significant role in shaping evolutionary dynamics.
    • Temporary evolutionary plateaus are a predictable consequence of certain genetic architectures.
    • The phenomenon offers insights into the mechanisms of evolutionary change and adaptation.