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Neophenogenesis: a developmental theory of phenotypic evolution.

T D Johnston1, G Gottlieb

  • 1Department of Psychology, University of North Carolina, Greensboro 27412-5001.

Journal of Theoretical Biology
|December 21, 1990
PubMed
Summary
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Neophenogenesis describes persistent, transgenerational phenotypic change over evolutionary time. This evolutionary biology concept emphasizes developmental processes and organism-environment interactions, not solely genetic changes.

Area of Science:

  • Evolutionary Biology
  • Developmental Biology
  • Phenotypic Plasticity

Background:

  • Neo-Darwinian theory posits genetic change as primary driver of evolution.
  • Phenotypic change is often considered a secondary outcome in Neo-Darwinian theory.
  • Existing frameworks may not fully account for all sources of evolutionary phenotypic change.

Purpose of the Study:

  • Introduce and define neophenogenesis: persistent, transgenerational phenotypic change.
  • Propose a theoretical framework encompassing all sources of phenotypic change, genetic and extra-genetic.
  • Highlight the central role of developmental mechanisms in evolutionary phenotypic change.

Main Methods:

  • Conceptual framework development.
  • Integration of developmental biology principles.

Related Experiment Videos

  • Re-evaluation of organism-environment interactions in evolution.

    • Main Results:

    • Neophenogenesis encompasses genetic and extra-genetic contributions to phenotypic change.
    • Developmental processes and organism-environment interactions are key drivers.
    • Persistence of new phenotypes depends on the stability of developmental interaction patterns.

    Conclusions:

    • Neophenogenesis offers a broader perspective on evolutionary phenotypic change beyond genetics.
    • Developmental plasticity and organism-environment interactions are crucial for evolutionary innovation.
    • The theory accommodates phenomena like genetic assimilation without requiring genetic change as a prerequisite.