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Spurious associations in unreplicated selected lines

N D Henderson1

  • 1Department of Psychology, Oberlin College, Ohio, USA. fhenders@oberlin.edu

Behavior Genetics
|March 1, 1997
PubMed
Summary
This summary is machine-generated.

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Animal models using selected lines can produce false-positive results due to genetic drift. Effect size and inbreeding coefficients are crucial for accurate biobehavioral character association studies.

Area of Science:

  • Behavioral genetics
  • Animal modeling

Background:

  • Selected lines of animals are common models for studying biobehavioral traits.
  • Genetic drift can lead to spurious associations between selected and novel traits.

Purpose of the Study:

  • To address the issue of false-positive associations in selected line studies.
  • To provide methods for interpreting results from animal models without replicate lines.

Main Methods:

  • Utilizing effect size to mitigate false positives from genetic drift.
  • Analyzing the impact of heritability and inbreeding coefficients on line differences.

Main Results:

  • Significant line differences can occur due to drift, not trait association.
  • Effect size, heritability (> .40), and moderate inbreeding help interpret results.

Related Experiment Videos

  • High inbreeding increases drift effects and false positives.

    • Conclusions:

    • Effect size is vital for selected line studies lacking replicates.
    • Reporting inbreeding coefficients is essential for study validity.
    • Careful interpretation is needed for low heritability traits or minimal differences in the selected trait.