The Peopling of Sao Tome (Gulf of Guinea)

Origins of Slave Settlers and Admixture with the Portuguese

Bibliographic Data

ID6068355
AuthorsGil Tomas (IPO Porto), Luisa Seco, Luísa M Sêco, Susana Seixa (0000-0002-7035-7422), Susana Seixas, Paula Faustino (0000-0002-6269-4867), Joao Lavinha (0000-0002-7474-6871), Jorge Rocha (0000-0002-7228-6330)
Year2002
Volume74
Issue3
Pages397-411
Publication date2002-01-01
Peer ReviewedYes
Open AccessNo
TypeARTICLE
VenueHuman Biology (JOURNAL)
Journal identifiersISSN: 0018-7143 • E-ISSN: 1534-6617
PublisherProject MUSE (PUBLISHER • US)
DOI10.1353/hub.2002.0036
PMID12180763
OpenAlexW2003923990
LanguageEN
Citations received11
References cited8

The geographic origins of African slave settlers and the Portuguese genetic contribution to the population of São Tomé (Gulf of Guinea) were assessed through the analysis of beta-globin haplotypes in 44 chromosomes bearing the betaS allele and through the study of the genetic variation in eight autosomal markers (APOA1, AT3, FY, LPL, OCA2, RB1, Sb19.3, and GC) informative for admixture in a sample of 224 individuals. The observed betaS haplotype distribution (36.4% Bantu, 52.3% Benin, 4.5% Cameroon, 4.5% Senegal, and 2.3% atypical) is in accordance with the historical information on the major geographic sources of slave settlers of São Tomé, although it captures a more important contribution of Central-West Africa regions than previously anticipated. European admixture, estimated to be 10.7 +/- 0.9%, has created a considerable level of genetic structure, as indicated by the finding of significant linkage disequilibrium between 33% of unlinked marker loci pairs. Recent admixture was found to have an important contribution to these values, since removal of individuals with Portuguese or Cape Verdian parents or grandparents from the sample dropped the miscegenation level to 6.5 +/- 0.8% and reduced significant linkage disequilibrium to 11% of unlinked marker pairs. Taken together, these results indicate that the peopling of São Tomé might have provided one of the first examples of the combination of diverse African contributions and European admixture that emerged from the overseas population relocations promoted by the Atlantic slave trade

Allele · Biology · Ethnology · Genealogy · Geography · Grandparent · Haplotype · Linkage Disequilibrium · Population · Portuguese · Sociology · Colonialism, slavery, and trade · Demography · Forensic and Genetic Research · Genetics · Global Maritime and Colonial Histories · History

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