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Effective population sizes with multiple paternity

D W Sugg1, R K Chesser

  • 1Savannah River Ecology Laboratory, Aiken, South Carolina 29802.

Genetics
|August 1, 1994
PubMed
Summary
This summary is machine-generated.

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New effective population size models account for mating tactics, sex ratios, and dispersal. Multiple male mates per female significantly increase effective population size, aiding genetic variation maintenance in conservation biology.

Area of Science:

  • Population genetics
  • Conservation biology
  • Evolutionary biology

Background:

  • Effective population size (Ne) is crucial for population genetics and conservation, but existing formulations often use restrictive assumptions.
  • Lack of agreement among different Ne formulations limits their practical application in ecological and evolutionary studies.

Purpose of the Study:

  • To develop novel mathematical expressions for effective population sizes that incorporate complex factors.
  • To investigate the impact of multiple paternity on maintaining genetic variation within populations.

Main Methods:

  • Developed expressions for effective population sizes considering mating tactics, sex ratio biases, and differential dispersal.
  • Introduced intragroup (coancestral) and intergroup effective sizes alongside standard inbreeding and variance effective sizes.

Related Experiment Videos

  • Formulated effective sizes for initial, instantaneous, and asymptotic stages of gene exchange.

    • Main Results:

    • Systems of mating with multiple male mates per female demonstrably increase effective population sizes compared to monogamy and polygyny.
    • Instantaneous and asymptotic effective sizes can be effectively expressed in relation to fixation indices.
    • The developed parameters provide a more comprehensive framework for understanding genetic variation dynamics.

    Conclusions:

    • The refined effective population size models offer greater applicability by relaxing restrictive assumptions.
    • Understanding the influence of mating systems, particularly multiple paternity, is vital for preserving genetic diversity.
    • These advanced models are valuable tools for evolutionary biology and conservation genetics research.