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Related Experiment Videos

Epigenetics and phenotypic variation in mammals.

Anne E Peaston1, Emma Whitelaw

  • 1School of Molecular and Microbial Biosciences, The University of Sydney, New South Wales 2006, Australia. anne.peaston@jax.org

Mammalian Genome : Official Journal of the International Mammalian Genome Society
|May 12, 2006
PubMed
Summary

Epigenetic factors significantly influence phenotypic variation, but their inheritance and impact in natural populations remain unclear. Further research in animal models is needed to understand these subtle genetic and environmental interactions.

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Area of Science:

  • Genetics and Molecular Biology
  • Developmental Biology
  • Evolutionary Biology

Background:

  • Phenotype arises from genotype-environment interactions, with additional unexplained variation.
  • Epigenetic phenomena are recognized contributors to phenotypic variation across biological levels.
  • Epigenetic modifications are mitotically heritable, but fidelity and transgenerational inheritance (meiosis) are poorly understood.

Purpose of the Study:

  • To investigate the extent to which epigenetic changes contribute to phenotypic variation in natural populations.
  • To identify phenotypic features indicative of an epigenetic component.
  • To determine the independence of epigenetic contributions from genetic changes.

Main Methods:

  • Studies utilizing suitable animal models.

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  • Designed to detect subtle, stochastically determined phenotypic variation.
  • Focus on assessing epigenetic inheritance and its contribution to observable traits.

    • Main Results:

    • Epigenetic modifications are mitotically heritable.
    • Transgenerational epigenetic inheritance through meiosis is less studied.
    • The precise contribution of epigenetics to phenotypic variation in natural populations is unclear.

    Conclusions:

    • Epigenetic factors play a role in phenotypic variation.
    • More research is required to understand epigenetic inheritance and its population-level effects.
    • Animal models are crucial for dissecting the genetic and environmental influences on phenotype.