Document Detail


Dissecting the genetic history of São Tomé e Príncipe: a new window from Y-chromosome biallelic markers.
MedLine Citation:
PMID:  17227478     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Twenty biallelic Y chromosome markers were analyzed in Angolares, Forros and Tongas, three population groups from the African archipelago of São Tomé e Príncipe. While most male lineages belonged to sub-Saharan haplogroups, the component of European origin added up 23.9% in the archipelago. This contrasts with the reported absence of European mtDNA lineages, and the combined findings testify to a strong sex-biased admixture process during the long-lasting colonial period in São Tomé e Príncipe. Furthermore, the male mediated European component was clearly found to be out of proportion to the small demographic impact of the Portuguese on the islands, reflecting high variance in the reproductive success of the individuals that contributed to its peopling. The male portion of European ancestry was 33.3% in Forros, 27.3% in Tongas and approximately two-fold less, 14.5%, in Angolares. The Angolares also showed the lowest haplogroup diversity and the most reduced number of different haplogroups. The current results reinforce our previous evidence pointing to remarkable restrictions in gene flow between Angolares and other São Tomean inhabitants, in agreement with their considerable isolation and confinement to the south-eastern tip of São Tomé until recently.
Authors:
M J Trovoada; L Tavares; L Gusmão; C Alves; A Abade; A Amorim; M J Prata
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Annals of human genetics     Volume:  71     ISSN:  0003-4800     ISO Abbreviation:  Ann. Hum. Genet.     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-01-17     Completed Date:  2007-03-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0416661     Medline TA:  Ann Hum Genet     Country:  England    
Other Details:
Languages:  eng     Pagination:  77-85     Citation Subset:  IM    
Affiliation:
Instituto Gulbenkian de Ciência, Rua da Quinta Grande, 6, P-2780-156 Oeiras, Portugal.
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MeSH Terms
Descriptor/Qualifier:
Africa
African Continental Ancestry Group / genetics*
Alleles
Chromosomes, Human, Y / genetics*
Emigration and Immigration
Ethnic Groups / genetics*
Genetic Drift
Genetic Markers
Genetics, Population*
Geography
Haplotypes
Humans
Male
Phylogeny
Chemical
Reg. No./Substance:
0/Genetic Markers

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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