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Related Experiment Videos

One-locus two-allele models with maternal (parental) selection

S Gavrilets1

  • 1Department of Ecology and Evolutionary Biology and Department of Mathematics, University of Tennessee, Knoxville, Tennessee 37996-1610, USA. gavrila@tiem.utk.edu

Genetics
|June 11, 1998
PubMed
Summary
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Maternal selection can alter evolutionary outcomes, potentially maintaining genetic diversity and causing population cycles. The study explores how parental selection impacts population genetics and evolution dynamics.

Area of Science:

  • Population Genetics
  • Evolutionary Biology
  • Mathematical Modeling

Background:

  • Parental selection, specifically maternal selection, is a key factor in evolutionary processes.
  • Understanding how parental selection influences genetic variation and population dynamics is crucial.

Purpose of the Study:

  • To investigate the effects of maternal (parental) selection on population evolution using simple genetic models.
  • To determine if maternal selection can lead to stable coexistence of different genetic equilibria.
  • To explore the conditions under which genetic variability is maintained and population cycles occur.

Main Methods:

  • Development of one-locus, two-allele models to simulate maternal (parental) selection.
  • Analysis of model equilibria to identify conditions for stability.

Related Experiment Videos

  • Examination of genotype frequency dynamics, including oscillations.

    • Main Results:

    • Maternal selection can lead to the simultaneous stability of different types of equilibria.
    • Population evolution outcomes can be highly dependent on initial conditions under maternal selection.
    • Genetic variability can persist even when offspring from heterozygous mothers do not survive.
    • Interactions between maternal and paternal selection can generate stable oscillations in genotype frequencies, particularly under strong selection.

    Conclusions:

    • Parental selection introduces complexity into evolutionary trajectories, influencing genetic diversity and stability.
    • The interplay of maternal and paternal selection can drive cyclical dynamics in genotype frequencies.
    • Initial population conditions play a significant role in determining evolutionary outcomes in the presence of maternal selection.