Brief communication: Admixture analysis with forensic microsatellites in Minas Gerais, Brazil: the ongoing evolution of the capital and of an African-derived community.
We report the estimated allele frequencies for 13 and 14 microsatellite loci in two populations of Minas Gerais, Brazil as follows: Belo Horizonte (the capital) and Marinhos (an African-derived community). Analysis of the African, Amerindian, and European genetic contributions to both populations, together with historical information, revealed distinct differences between the two populations. Estimates for Belo Horizonte revealed a higher-European (66%) than African (32%) contribution, and a minimal Amerindian contribution. These results are consistent with the peopling of the city mainly by people from the Minas Gerais hinterland, a people highly admixed but with more European ancestry. Estimates for Marinhos confirmed the high-African component of the population. However, a temporal analysis of two datasets-CURRENT (representing the population living in Marinhos today) and ORIGINAL (representing families, who have lived in Marinhos since the onset of the 20th century),-identified a diminishing of the population's African ancestry from 92% in the ORIGINAL group to 67% in the CURRENT group. This change is here interpreted as a consequence of the growing migration into the village of people with more European ancestry and subsequent admixture with the local population.
Scliar
Marília O
MO
Departamento de Biologia Geral, ICB, Universidade Federal de Minas Gerais. Caixa Postal 486, 31270-910 Belo Horizonte, MG, Brazil. mariliascliar@icb.ufmg.br
Vaintraub
Marco T
MT
Vaintraub
Patrícia M V
PM
Fonseca
Cleusa G
CG
D044383:Black People / Q000235:genetics*; D001938:Brazil; D003710:Demography; D004641:Emigration and Immigration; D005787:Gene Frequency; D005828:Genetics, Population; D006801:Humans; D007199:Indians, South American / Q000235:genetics*; D018895:Microsatellite Repeats / Q000235:genetics; D044465:White People / Q000235:genetics*