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Genetic Variance Estimates and Familial Resemblance for Body Size Traits

Published online by Cambridge University Press:  01 August 2014

Krishan Sharma
Krishan Sharma*
Affiliation:
Department of Anthropology, Panjab University, Chandigarh, India
*
Department of Anthropology, Panjab University, Chandigarh - 160014, India

Abstract

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To study genetic contribution to complex body size traits, the intrafamilial correlation and regression analyses along with twin study method have been used. The data are based on a sample of 45 MZ and 101 DZ twin pairs, their 125 singleton siblings, 104 fathers and 103 mothers in 146 Punjabi families living in Chandigarh, India. Twin study gives no evidence of inequality of means and variances between zygosities. Within-pair genetic variance ratios, correlations, regressions of offspring on midparent and single parent are all significant at 0.1%, thus indicating strong genetic component. Heritability estimates are higher for longitudinal body traits than the breadth dimensions. The resemblance of the children with the parents of either sex is not equal. Higher maternal influence is indicated for a number of body traits. The results on familial correlations do not support the hypothesis of sex-linked inheritance for any of the traits considered in this investigation. These results have been compared with those from other such studies.

Keywords

Genetic varianceHeritabilityFamilial correlationsBody measurementsTwinsIndia
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 36 , Issue 4 , October 1987 , pp. 549 - 555
Copyright
Copyright © The International Society for Twin Studies 1987

References

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