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Quantitative genetics of sexual dimorphism in body fat measurements
Author(s) -
Comuzzie Anthony G.,
Blangero John,
Mahaney Michael C.,
Mitchell Braxton D.,
Stern Michael P.,
Maccluer Jean W.
Publication year - 1993
Publication title -
american journal of human biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.559
H-Index - 81
eISSN - 1520-6300
pISSN - 1042-0533
DOI - 10.1002/ajhb.1310050616
Subject(s) - sexual dimorphism , biology , anthropometry , context (archaeology) , genotype , genetic architecture , evolutionary biology , variance components , sex characteristics , genetics , demography , zoology , quantitative trait locus , statistics , geography , gene , paleontology , mathematics , archaeology , sociology
A variance decomposition analysis using maximum likelihood methods was employed to examine the genetic architecture of sexual dimorphism in anthropometric traits in a large pedigreed sample of Mexican American individuals from San Antonio, Texas. For this analysis the magnitude of sexual dimorphism was viewed as arising from a special case of genotype by environment interaction (G × E), that of genotype by sex (G × S). Evidence indicates a marked G × S interaction for 9 of the 12 traits examined and 1 of the 4 indices, findings which are interpreted as indicators of a strong genetic component to the degree of sexual dimorphism expressed in these traits. Such results have important implications for the use and interpretation of these traits in an epidemiological as well as an evolutionary context. © 1993 Wiley‐Liss, Inc.