摘要： Background: Dermatoglyphics is widely used as a genetically
determined trait in Anthropology. However, little is known about
their pattern of inheritance due to lack of advanced statistical
genetic model-fitting techniques despite the existence of advanced
statistical packages.
Objectives: The aim of the present study is to determine
the mode of inheritance of dermatoglyphic traits through complex
segregation analysis. Subjects and Methods: Finger and palmar prints
of 325 individuals belonging to 104 families from the Chuvashian
population of Russia were used for principal component analysis,
familial correlation, and segregation analysis (package MAN-5).
Results: The results suggest a common internal structure
of three factors when compared with other populations. (b) Significant
familial correlations (except spouse) indicate the involvement of
familial components to the variation of dermatoglyphic traits. (c)
Segregation analysis reveals the transmission of genetic effects
in the families, which follows the Mendelian model and confirm major
gene effect on factors 1 and 2, whereas there is no evidence of
major gene effect or an environmental effect on factor 3.
Conclusion: Major gene involvement with Mendelian expectation
regarding finger dermatoglyphics is confirmed for all
analyzed traits. However there is no evidence of significant support
for major gene effect or environmental effect on palmar a-b ridge
counts.
