The phylogeography of Brazilian Y-chromosome lineages

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

Carvalho Silva, DR (Autor) Outra; Santos, FR (Autor) Outra; Rocha, J (Autor) FCUP; Pena, SDJ (Autor) Outra

Revista

Título: American Journal of Human Genetics

Vol. 68

Páginas: 281-286

ISSN: 0002-9297

Editora: Elsevier

Indexação

ISI Web of Knowledge - 257 Citações

Scopus - 278 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da terra e ciências do ambiente

Outras Informações

ID Authenticus: P-000-WQK

DOI: 10.1086/316931

Abstract (EN): We examined DNA polymorphisms in the nonrecombining portion of the Y-chromosome to investigate the contribution of distinct patrilineages to the present-day white Brazilian population. Twelve unique-event polymorphisms were typed in 200 unrelated males from four geographical regions of Brazil and in 93 Portuguese males. In our Brazilian sample, the vast majority of Y-chromosomes proved to be of European origin. Indeed, there were no significant differences when the haplogroup frequencies in Brazil and Portugal were compared by means of an exact test of population differentiation. Y-chromosome typing was quite sensitive in the detection of regional immigration events. Distinct footprints of Italian immigration to southern Brazil, migration of Moroccan Jews to the Amazon region, and possible relies of the 17th-century Dutch invasion of northeast Brazil could be seen in the data. In sharp contrast with our mtDNA data in white Brazilians, which showed that greater than or equal to 60% of the matrilineages were Amerindian or African, only 2.5% of the Y-chromosome lineages were from sub-Saharan Africa, and none were Amerindian. Together, these results configure a picture of strong directional mating between European males and Amerindian and African females, which agrees with the known history of the peopling of Brazil since 1500.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6