Genomic ancestry of rural African-derived populations from Southeastern Brazil
| Autor: | Lilian Kimura, João Pedro Vicente, Sidney Santos, Regina Célia Mingroni-Netto, Elzemar Martins Ribeiro-Rodrigues, Maria Teresa B. M. Auricchio |
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| Rok vydání: | 2012 |
| Předmět: |
Male
Genotype Population Zoology Black People Breeding GENOMAS White People Gene flow Gene Frequency INDEL Mutation Genetics Hum Humans education Indel Ecology Evolution Behavior and Systematics education.field_of_study Amazon rainforest Indians South American Genetic Variation Genomics Sequence Analysis DNA Genetic differentiation Geography Anthropology Female Anatomy Brazil Demography |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1520-6300 |
| Popis: | Objectives: xMany Africans were brought to Brazil as slaves. The runaway or abandoned slaves founded isolated communities named quilombos. There are many quilombo remnants in Vale do Ribeira region in the southern part of Sao Paulo State. The aim of our study was to contribute to understanding the origins of these populations, through admixture studies. Methods: We genotyped 307 unrelated DNA samples obtained from ten quilombo populations from Vale do Ribeira region, using a panel of 48 INDEL polymorphisms. We estimated genetic differentiation between populations (FST) and genomic ancestry from these populations. Our data were compared to a similar study performed in quilombo remnants from the Brazilian Amazon region. Results: Population admixture estimates showed high degree of miscegenation in the quilombo remnants from Vale do Ribeira (average admixture estimates at 39.7% of African, 39.0% of European and 21.3% of Amerindian contribution). The proportions of ancestral genes varied greatly among individuals, ranging from 7.3 to 69.5%, 12.9 to 68.3%, and 7.3 to 58.5% (African, European, and Amerindian, respectively). Genetic differentiation between these populations was low (all FST values |
| Databáze: | OpenAIRE |
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