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Linkage modification with mixed random mating and selfing: a numerical study.

K E Holsinger, M W Feldman

    Genetics
    |February 1, 1983
    PubMed
    Summary
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    Selection for increased recombination can occur in populations with mixed random mating and selfing, particularly at moderate selfing rates. The direction of selection depends on the population

    Area of Science:

    • Population genetics
    • Evolutionary biology
    • Quantitative genetics

    Background:

    • Recombination is a key driver of genetic variation and evolution.
    • Understanding the forces that shape recombination rates is crucial for evolutionary studies.
    • Previous models often assumed constant mating systems or selection pressures.

    Purpose of the Study:

    • To investigate the conditions under which selection for increased or decreased recombination can occur in populations with mixed random mating and selfing.
    • To explore the influence of different fitness regimes and population states on the direction of selection on recombination.
    • To identify potential criteria for predicting selection for increased recombination.

    Main Methods:

    • Mathematical modeling of population genetics.

    Related Experiment Videos

  • Analysis of selection dynamics under varying mating systems (random mating, selfing, mixed).
  • Examination of different fitness landscapes and initial population states.

    • Main Results:

    • Selection for increased recombination can occur with mixed random mating and selfing, especially at moderate selfing rates.
    • The direction of selection can be influenced by the degree of selfing, historical population state, and current recombination frequency.
    • Selection for increased recombination is linked to specific fitness matrices where certain double homozygotes have reduced fitness.

    Conclusions:

    • Mating system dynamics significantly impact the evolution of recombination rates.
    • The evolution of recombination is context-dependent, influenced by both mating system and fitness landscape.
    • Further research is needed to fully characterize fitness conditions favoring increased recombination.