Analysis of paternal lineages in Brazilian and African populations

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Carvalho, M (Author) Other; Brito, P (Author) Other; Lopes, V (Author) Other; Andrade, L (Author) Other; Anjos, MJ (Author) Other; Real, FC (Author) Other; Gusmao, L (Author) FCUP

Journal

Title: Genetics and Molecular Biology

Vol. 33

Pages: 422-427

ISSN: 1415-4757

Publisher: Sociedade Brasileira de Genetica

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 10 Citations

Other information

Authenticus ID: P-003-B17

DOI: 10.1590/s1415-47572010005000067

Abstract (EN): The present-day Brazilian population is a consequence of the admixture of various peoples of very different origins, namely, Amerindians, Europeans and Africans. The proportion of each genetic contribution is known to be very heterogeneous throughout the country. The aim of the present study was to compare the male lineages present in two distinct Brazilian populations, as well as to evaluate the African contribution to their male genetic substrate. Thus, two Brazilian population samples from Manaus (State of Amazon) and Ribeirao Preto (State of Sao Paulo) and three African samples from Guinea Bissau, Angola and Mozambique were typed for a set of nine Y chromosome specific STRs. The data were compared with those from African, Amerindian and European populations. By using Y-STR haplotype information, low genetic distances were found between the Manaus and Ribeirao Preto populations, as well as between these and others from Iberia. Likewise, no significant distances were observed between any of the African samples from Angola, Mozambique and Guinea Bissau. Highly significant Rst values were found between both Brazilian samples and all the African and Amerindian populations. The absence of a significant Sub-Saharan African male component resulting from the slave trade, and the low frequency in Amerindian ancestry Y-lineages in the Manaus and Ribeirao Preto population samples are in accordance with the accentuated gender asymmetry in admixture processes that has been systematically reported in colonial South American populations.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6