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Genetic signatures of parental contribution in black and white populations in Brazil

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Genetic signatures of parental contribution in black and white populations in Brazil

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Título Genetic signatures of parental contribution in black and white populations in Brazil
Autor Guerreiro-Junior, Vanderlei Farias
Machado, Rafael Bisso
Marrero, Andrea Rita
Hunemeier, Tábita
Salzano, Francisco Mauro
Bortolini, Maria Cátira
Abstract Two hundred and three individuals classified as white were tested for 11 single nucleotide polymorphisms plus two insertion/deletions in their Y-chromosomes. A subset of these individuals (n = 172) was also screened for sequences in the first hypervariable segment of their mitochondrial DNA (mtDNA). In addition, complementary studies were done for 11 of the 13 markers indicated above in 54 of 107 black subjects previously investigated in this southern Brazilian population. The prevalence of Y-chromosome haplogroups among whites was similar to that found in the Azores (Portugal) or Spain, but not to that of other European countries. About half of the European or African mtDNA haplogroups of these individuals were related to their places of origin, but not their Amerindian counterparts. Persons classified in these two categories of skin color and related morphological traits showed distinct genomic ancestries through the country. These findings emphasize the need to consider in Brazil, despite some general trends, a notable heterogeneity in the pattern of admixture dynamics within and between populations/groups.
Contido em Genetics and molecular biology. Ribeirão Preto, SP. Vol. 32, n. 1 (Mar 2009), p. 1-11
Assunto Brasil
Cromossomo Y
Genética de populações
Genética humana
[en] Admixture dynamics
[en] MtDNA
[en] Y-chromosome markers
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/23411
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