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Heritability in retrospect.

A E Bell

    The Journal of Heredity
    |September 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    The term heritability has evolved significantly since 1832. Modern usage, originating in 1936, defines heritability as additive genetic variance over total phenotypic variance.

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    Area of Science:

    • Genetics
    • Evolutionary Biology
    • Quantitative Genetics

    Background:

    • The term "heritability" has a complex etymological and conceptual history.
    • Understanding its evolution is crucial for accurate interpretation in genetic studies.

    Observation:

    • Early usage (1832) broadly meant the capacity for inheritance.
    • Around the 20th century, it approximated "broad sense heritability," distinguishing environmental from genetic factors.
    • The current definition of "narrow sense heritability" emerged in 1936.

    Findings:

    • Heritability's meaning has become progressively more restrictive over time.
    • The initial stage denoted general hereditary transmission.
    • The second stage distinguished genetic from environmental influences, aligning with broad sense heritability.

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  • The modern definition, narrow sense heritability, quantifies additive genetic variance relative to total phenotypic variance.

    • Implications:

    • Clarifies the historical development of a key quantitative genetics concept.
    • Highlights the importance of precise definitions in scientific communication.
    • Provides context for interpreting past and present heritability estimates in biological research.