title: African-derived South American populations: A history of symmetrical and asymmetrical matings according to sex revealed by bi- and uni-parental genetic markers.
abstract: Estimates of African, European, and Amerindian contributions to the gene pool of 11 predominantly African-derived South American populations were obtained using five autosomal and one Y chromosome hypervariable loci, as well as mitochondrial DNA (sequences of the first hypervariable segment of the control region, plus two restriction sites and the presence or absence of the CoII/tRNA(Lys) intergenic 9-bp deletion). The three latter characteristics are reported here for the first time for 42 individuals living in three Brazilian populations. Thirty-eight sequences were identified in these persons; 17 (45%) could be classified as being of African, 4 (11%) of Amerindian, and 2 (5%) of European origin. Evidence for asymmetrical matings in relation to sex and ethnic group was obtained for nine of the 11 populations. The most consistent finding was the introduction of European genes through males, but the results differ in the several communities, indicating the importance of local factors in such interactions. Am. J. Hum. Biol. 11:551-563, 1999. Copyright 1999 Wiley-Liss, Inc.
authors.affiliation: Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: Maria Cátira
authors.initials: MC
authors.lastname: Bortolini
authors.forename: Wilson Araújo
authors.lastname: Da Silva WA Junior
authors.forename: Dinorah Castro
authors.initials: DC
authors.lastname: De Guerra
authors.forename: Gabriela
authors.initials: G
authors.lastname: Remonatto
authors.forename: Rosana
authors.initials: R
authors.lastname: Mirandola
authors.forename: Mara H.
authors.initials: MH
authors.lastname: Hutz
authors.forename: Tania A.
authors.initials: TA
authors.lastname: Weimer
authors.forename: Maria Cristina B.O.
authors.initials: MC
authors.lastname: Silva
authors.forename: Marco Antonio
authors.initials: MA
authors.lastname: Zago
authors.forename: Francisco Mauro
authors.initials: FM
authors.lastname: Salzano