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A pleiotropic model of phenotypic evolution

Y Tanaka1

  • 1Laboratory of Theoretical Ecology, Yokohama National University, Japan. tanaka@kan.ynu.ac.jp

Genetica
|October 10, 1998
PubMed
Summary
This summary is machine-generated.

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This study presents a pleiotropic model showing that gene effects on both fitness and traits reduce evolutionary rate and selection limits. This provides insights into genetic variance and long-term adaptation under selection.

Area of Science:

  • Evolutionary genetics
  • Quantitative genetics

Background:

  • Mutations can affect multiple traits (pleiotropy).
  • Pleiotropic mutations can have direct effects on fitness and indirect effects on quantitative traits.

Purpose of the Study:

  • To develop a pleiotropic model for genetic variance and response to selection.
  • To investigate how pleiotropic effects influence evolutionary rates and adaptation limits.

Main Methods:

  • Derivation of equilibrium genetic variance under mutation and stabilizing selection.
  • Calculation of genetic response to directional selection using the pleiotropic model.

Main Results:

  • The model provides a general form for equilibrium genetic variance, incorporating mutation, stabilizing selection, and direct deleterious effects.

Related Experiment Videos

  • Pleiotropic effects were shown to reduce both the evolutionary rate and the selection limit for quantitative traits.

    • Conclusions:

    • Pleiotropy significantly constrains evolutionary potential.
    • The model offers a framework for understanding the interplay of mutation, selection, and pleiotropy in shaping genetic variation and evolutionary trajectories.