INVESTIGADORES
DEMARCHI Dario Alfredo
artículos
Título:
Variation in palmar quantitative dermatoglyphics among Argentinian aboriginal populations
Autor/es:
DEMARCHI DA
Revista:
HOMO
Editorial:
Elsevier
Referencias:
Año: 2000 vol. 51 p. 19 - 29
ISSN:
0018-442X
Resumen:
This paper examines the pattern and extent of genetic variation within and between five Argentinian aboriginal populations through the analysis of quantitative palmar dermatoglyphics. Small bilateral asymmetry in interdigital ridge-counts and atd angle, and low sexual dimorphism for all the variables studied were found among all the studied populations. In contrast, uni- and multi-variate intergroup comparisons reveal highly significant interpopulation variation. Cluster analysis of the Mahalanobis´ distances portrays the close resemblance between males and females of each population and reveals a clear separation of the Araucano, from the Patagonia, and the tribes from the Gran Chaco. The Relethford-Blangero model for assessing the effects of differential external gene flow suggests a greater than the average admixture from outside the region for the Araucano, which is expected given evidence from traditional genetic markers. A minimum estimate of FST = 0.079 confirms the substantial genetic differentiation undergone by the indigenous Argentinian populations.