Historical genetics: Spatiotemporal analysis of the formation of the Brazilian population

Authors

  • Sidia M. Callegari-Jacques,

    Corresponding author
    1. Departamento de Estatística, Instituto de Matemática, Universidade Federal do Rio Grande do Sul, Campus do Vale, 91540-000 Porto Alegre, RS, Brazil
    2. Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil
    • Departamento de Genética, UFRGS, Caixa Postal 15053, 91501-970 Porto Alegre, RS, Brazil
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  • Dario Grattapaglia,

    1. Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, SGAN 916, Mod. B, Asa Norte, 70790-160 Brasília, DF, Brazil
    2. Hereditas – Tecnologia em Análise de DNA, SHIN CA 02 lote 19, Lago Norte, 71505-000 Brasília, DF, Brazil
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  • Francisco M. Salzano,

    1. Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil
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  • Sabrina P. Salamoni,

    1. Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil
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  • Shaiane G. Crossetti,

    1. Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil
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  • Márcio E. Ferreira,

    1. Hereditas – Tecnologia em Análise de DNA, SHIN CA 02 lote 19, Lago Norte, 71505-000 Brasília, DF, Brazil
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  • Mara H. Hutz

    1. Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil
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Abstract

A total of 1,037 individuals living in five different sociogeographic regions of Brazil were studied in relation to 12 short tandem repeat polymorphisms. The objective was to assess the degree of European, African, and Amerindian contributions to their gene pools. Although most of the genetic variability was found within regions, significant differences were also observed between regions. The estimated relative proportions of the above-indicated continental contributions showed intermediate values between those obtained with uniparental (mtDNA, Y-chromosome) data, and a higher percentage of European heritage as compared to previous autosome results. A north–south trend of increasing European contribution was also found, in agreement with the history of the Brazilian population. Am. J. Hum. Biol. 15:824–834, 2003. © 2003 Wiley-Liss, Inc.

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