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Related Experiment Videos

Gene interactions from maternal effects.

J B Wolf1

  • 1Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA. jwolf@pcg.wustl.edu

Evolution; International Journal of Organic Evolution
|February 24, 2001
PubMed
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Parental genes can influence offspring traits, creating genotype-by-genotype epistasis. This interaction, particularly through maternal effects, can shape evolutionary adaptive landscapes by impacting early-life fitness.

Area of Science:

  • Evolutionary biology
  • Genetics
  • Quantitative genetics

Background:

  • Epistasis, or gene interactions, is crucial for evolutionary processes.
  • Traditional models focus on physiological epistasis within an individual's genotype.
  • Parental genes can also influence offspring phenotypes, leading to different epistasis types.

Purpose of the Study:

  • To introduce and analyze genotype-by-genotype epistasis arising from parental effects.
  • To contrast this with physiological epistasis.
  • To explore the evolutionary implications of parent-offspring genetic interactions.

Main Methods:

  • Developed a two-locus model with maternal and direct effect loci.
  • Derived dynamical equations for the maternal-offspring epistasis model.

Related Experiment Videos

  • Compared these dynamics with those of physiological epistasis models.

    • Main Results:

    • Parent-offspring interactions can lead to genotype-by-genotype epistasis.
    • This form of epistasis may contribute to rugged adaptive landscapes.
    • Early mortality, influenced by parental effects, is a key factor in fitness variance.

    Conclusions:

    • Maternal-offspring epistasis offers a new perspective on evolutionary dynamics.
    • It has significant implications for understanding adaptive landscapes and fitness.
    • Potential applications include quantitative-trait-loci (QTL) studies.