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Related Experiment Videos

Some models of genetic selection.

E Pollak

    Biometrics
    |March 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Classical viability selection theory, often independent of population structure, has limitations. New models incorporating density dependence are crucial for understanding natural selection and quantitative genetics.

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    Area of Science:

    • Evolutionary Biology
    • Quantitative Genetics

    Background:

    • Classical viability selection assumes constant survival probabilities, independent of time and population structure.
    • This theory is closely linked to mass selection in quantitative genetics.

    Purpose of the Study:

    • To review salient features of classical viability selection theory.
    • To discuss limitations of classical theory and explore alternative models like density-dependent selection.

    Main Methods:

    • Review of existing literature on classical viability and fecundity selection.
    • Discussion of theoretical implications for population genetics and quantitative genetics.

    Main Results:

    • Viability selection at multiple loci does not guarantee increased mean viability.

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  • Fecundity selection can lead to decreased or oscillating mean fecundity.
  • Classical theory is insufficient for natural selection, especially in limited habitats.

    • Conclusions:

    • Classical viability selection theory has limitations in predicting evolutionary outcomes.
    • Density and frequency-dependent selection are important factors in natural selection.
    • These factors have implications for artificial selection on reproductive traits and quantitative genetics.