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Comparative evolution: latent potentials for anagenetic advance.

G L Stebbins1, D L Hartl

  • 1Department of Genetics, University of California, Davis 95616.

Proceedings of the National Academy of Sciences of the United States of America
|July 1, 1988
PubMed
Summary
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Polymorphic alleles in microorganisms can hold latent potential for adaptation, offering insights into evolutionary advances in higher organisms. Novel ecological opportunities can unlock these pre-existing potentials for evolutionary progress.

Area of Science:

  • Evolutionary biology
  • Microbial genetics

Background:

  • Experimental evolutionary studies reveal that alleles can possess latent adaptive potential.
  • These potentials may not be apparent under typical conditions but can be revealed in new environments.

Purpose of the Study:

  • To propose a general evolutionary principle linking latent selection potentials to anagenic advances.
  • To use microbial experimental evolution as a model for evolutionary processes in higher organisms.

Main Methods:

  • Review of experimental evolutionary studies in microorganisms.
  • Theoretical proposal of a general evolutionary principle.

Main Results:

  • Microbial alleles can exhibit latent potential to respond to selection in novel environments.

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  • These findings serve as models for evolutionary advances in higher organisms.

    • Conclusions:

    • Anagenic advances often arise from exploiting pre-existing latent selection potentials.
    • Novel ecological opportunities are key to unlocking these potentials for evolutionary progress.