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The reduction principle for recombination under density-dependent selection

L A Zhivotovsky1, M W Feldman

  • 1Institute of Gene Biology, Russian Academy of Sciences, Moscow.

Theoretical Population Biology
|April 1, 1995
PubMed
Summary
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Genetic modifiers that reduce recombination invade populations, especially when density-dependence is strong. This study generalizes the Reduction Principle for the evolution of recombination in ecological genetics.

Area of Science:

  • Population Genetics
  • Evolutionary Biology
  • Ecological Genetics

Background:

  • Genetic modifiers of recombination can invade populations under specific conditions.
  • Previous work established the Reduction Principle for recombination evolution in diploid models.

Purpose of the Study:

  • To investigate the evolution of recombination in haploid populations with density-dependent regulation.
  • To generalize the Reduction Principle to include ecological factors and density dependence.

Main Methods:

  • Developed a haploid multilocus population genetics model.
  • Incorporated density-dependent population size regulation.
  • Included weak density-dependent differential selection among multilocus genotypes.

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Main Results:

  • An allele reducing recombination invades if it lowers a weighted average of recombination rates among selected loci.
  • The strength of density-dependence inversely affects selection for reduced recombination.
  • This finding generalizes the Reduction Principle to ecological systems.

Conclusions:

  • Density-dependent selection and ecological factors influence the evolution of recombination.
  • Reduced recombination is favored under ecological pressures, with intensity modulated by density dependence.
  • The study provides a broader framework for understanding recombination evolution in natural populations.