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Y-Chromosome lineages in São Tomé e Príncipe Islands: evidence of european influence
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Advisor(s)
Abstract(s)
The Y-chromosome haplogroup composition of the population of Sa
˜
o Tome
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e
Prı
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ncipe (STP) archipelago was analyzed using 25 biallelic markers and compared with popula-
tions of different origins from Europe, Africa, and the Middle East. Two main Y-chromosome
haplogroups were found: E3a, very common among sub-Saharans accounts for 84.2% of the pa-
ternal lineages and R1b, typical of West Eurasia, represents 8.7% of the overall male popula-
tion. Nevertheless, we detected in the population of STP a significant heterogeneous distribu-
tion of R1b among the two main ethnic groups of the archipelago: Forros (10.3%) and Angolares
(6.6%). Together, haplogroups known to be prevalent in West Eurasia reach 12.5% of the chro-
mosomes analyzed unequally distributed among the two groups: Forros present 17.7% while
Angolares display only 8.2% of west Eurasian haplogroups. Our findings suggest that, despite
its sub-Saharan genetic background, a relevant contribution of European paternal lineages is
present in nowadays STP population. This influence has shown to be stronger in Forros than in
Angolares, which could be explained by the social isolation that these have last experienced
through their history. Am. J. Hum. Biol. 19:422–428, 2007.
Description
Keywords
Y-Chromosome lineages European influence São Tomé e Príncipe Islands . Faculdade de Ciências da Vida
Citation
Gonçalves, R., Spínola, H., & Brehm, A. (2007). Y‐chromosome lineages in São Tomé e Príncipe islands: Evidence of European influence. American Journal of Human Biology: The Official Journal of the Human Biology Association, 19(3), 422-428.