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Related Experiment Videos

Selection for agonistic behavior in wild female mice

J S Hyde, T F Sawyer

    Behavior Genetics
    |July 1, 1980
    PubMed
    Summary

    Selective breeding successfully increased interfemale aggression in mice over 11 generations. This study demonstrates the genetic basis of aggression in female mice, with distinct high and low lines established.

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    Area of Science:

    • Behavioral Genetics
    • Animal Behavior

    Background:

    • Aggression is a complex behavior influenced by genetic and environmental factors.
    • Understanding the genetic underpinnings of aggression can provide insights into social behavior.

    Purpose of the Study:

    • To investigate the genetic basis of isolation-induced, interfemale aggression in Mus musculus.
    • To establish divergent lines of mice with varying levels of aggression through selective breeding.

    Main Methods:

    • Selective breeding over 11 generations using within-family selection.
    • Establishment of two high, two low, and two unselected control lines.
    • Observation and quantification of interfemale aggression under isolation and group housing conditions.

    Main Results:

    • Successful divergence of aggression levels between high, low, and control lines.
    • In recent generations, 50% of high-line females attacked, compared to 25% of controls and 5% of low-line females.
    • Realized heritabilities ranged from 0.12 to 0.46, indicating a genetic component to aggression.

    Conclusions:

    • Selective breeding is effective in modifying interfemale aggression in mice.
    • The study highlights the heritability of aggression and its potential for manipulation.
    • Correlated responses in male aggression were not observed, suggesting sex-specific genetic influences.

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