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Related Experiment Videos

Evolutionary capacitance may be favored by natural selection.

Joanna Masel1

  • 1Department of Biological Sciences, Stanford University, Stanford, California 94305, USA. masel@u.arizona.edu

Genetics
|May 25, 2005
PubMed
Summary
This summary is machine-generated.

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Evolutionary capacitors reveal hidden genetic variation reversibly. The optimal rate of this revelation depends on population size and environmental change, with selection overcoming drift.

Area of Science:

  • Evolutionary biology
  • Genetics
  • Population dynamics

Background:

  • Evolutionary capacitors facilitate the reversible expression of cryptic genetic variation.
  • This contrasts with the gradual accumulation of variation through mutation.

Purpose of the Study:

  • To investigate the invasion dynamics of genetic "modifiers of revelation."
  • To determine how the optimal rate of revelation (mopt) is influenced by population size (N) and environmental change rate (theta).

Main Methods:

  • Stochastic modeling of modifier invasion.
  • Analysis of modifier dynamics across varying population sizes and environmental change rates.

Main Results:

  • The optimal rate of revelation (mopt) is dependent on population size (N) and environmental change rate (theta).

Related Experiment Videos

  • For small populations (N < Nmin), revelation is selected against; Nmin is small and increases with theta-1/2.
  • For large populations (N > 1/theta), mopt approximates 1/N, with selection being highly effective.
  • In intermediate populations, mopt is slightly less than theta, with weak selection favoring it.

    • Conclusions:

    • Selection for revelation can be strong enough to counteract random genetic drift.
    • The study provides insights into the evolution of genetic variation expression and its regulation.