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Quantitative genetic analysis of bi-iliac breadth.
American Journal of Physical Anthropology
|November 1, 1988
Summary
Bi-iliac breadth, a measure of pelvic width, increases with age and shows minimal sex differences. This study suggests it is a polygenic trait inherited through autosomal genes, with significant heritability.
Area of Science:
- Anthropometry
- Human Genetics
- Biometrics
Background:
- Bi-iliac breadth is a key anthropometric measurement.
- Understanding its inheritance patterns is crucial for genetic studies.
Purpose of the Study:
- To investigate the inheritance patterns of bi-iliac breadth.
- To determine if bi-iliac breadth is influenced by age and sex.
Main Methods:
- Bi-iliac breadth was measured in 3,632 Japanese individuals (1,547 males, 2,085 females) aged 20-79.
- Statistical analyses, including correlation coefficients and heritability estimations, were performed.
Main Results:
- Bi-iliac breadth increased with age but showed little sex difference.
- Significant positive correlations were found between parents and sons, and mothers and daughters.
- Heritability was estimated at approximately 0.54-0.55, with additive genetic variance being dominant.
Conclusions:
- Bi-iliac breadth is a quantitative genetic trait controlled by polygenes on autosomes.
- The trait exhibits significant heritability, primarily due to additive genetic effects.