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Genetical ESS-models. II. Multi-strategy models and multiple alleles.

B Thomas

    Theoretical Population Biology
    |August 1, 1985
    PubMed
    Summary

    Genetical models reveal how sexual populations maintain evolutionarily stable strategies (ESS). Sufficient genetic variation allows populations to stabilize at a phenotypic ESS, even with new alleles.

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    Area of Science:

    • Evolutionary biology
    • Population genetics
    • Game theory

    Background:

    • Evolutionarily stable strategies (ESS) are crucial for understanding population dynamics.
    • Phenotypic ESS models offer insights but often lack a genetic basis.
    • Genetical ESS models bridge phenotypic models with underlying genetic systems.

    Purpose of the Study:

    • To investigate evolutionarily stable strategies (ESS) in sexual populations using genetical models.
    • To link phenotypic ESS models to underlying genetic systems in diploid, panmictic populations.
    • To analyze conditions for maintaining phenotypic ESS and explore alternative stable states.

    Main Methods:

    • Development and analysis of multi-strategy genetical ESS models.
    • Focus on multi-allelic, one-locus genetic systems in diploid populations.
    • Examination of gene pool dynamics and allelic variation's impact on stability.

    Main Results:

    • Sexual populations can maintain a phenotypic ESS if genotypes can produce it.
    • Sufficient allelic variation allows gene pools to be ESS or part of an attracting set of states.
    • Alternative ESS in the genetical model may be less durable, potentially evolving towards a phenotypic ESS.

    Conclusions:

    • Genetical ESS models provide a robust framework for studying stability in sexual populations.
    • Allelic variation plays a key role in the stability and evolution of populations at ESS.
    • Phenotypic ESS are generally more durable than genetical ESS dependent on current genotypes.

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