Abstract

PAROLIN, María L et al. Análisis de la diversidad biológica y mestizaje en la Ciudad de Puerto Madryn (prov. De Chubut, Argentina). Rev Arg Antrop Biol [online]. 2013, vol.15, n.1, pp.61-75. ISSN 1514-7991.

In the frame of the study of the genetic composition of Argentinean cosmopolitan populations, a population sample of the city of Puerto Madryn (PM) was analyzed in order to evaluate its biological diversity using biparental and uniparental markers and compare the results with those previously obtained by our research team in six cosmopolitan populations from different regions of Argentina. The emphasis was laid on the populations of the Patagonia region. Biological samples were taken with informed consent from 82 unrelated blood donors, who attended the Regional Blood Bank and Hospital of the town and also underwent a genealogical survey. From the data obtained by analyzing autosomal markers, a European contribution of 67.2%, an Amerindian one of 29.4%, and an African one of 3.4% were estimated. The 59.9% and 8.7% of the maternal and paternal lineages, respectively, were ascribed to Native American origins, revealing an unequal gender indigenous contribution. The European contribution was mainly represented by H Hg (19.5%), and only two sub-Saharan lineages were detected. In PM, migrations from the center of the country have had a strong impact, as reflected in the greater contribution of European markers, with respect to the two samples previously studied in the province of Chubut (Comodoro Rivadavia and Esquel). These differences warn us of the necessity of accounting for the regional particularities when analyzing the genetic constitution of populations.

Keywords : Puerto Madryn; genetic structure; miscegenation; regional differences.

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