Pattern of mtDNA Variation in Three Populations from São Tomé e Príncipe

Trovoada, Maria Jesus; Pereira, Luı́sa; Gusmão, Leonor; Abade, Augusto; Amorim, António; Prata, Maria João

doi:10.1046/j.1529-8817.2003.00070.x

Cited by 33 publications

(24 citation statements)

References 18 publications

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“…Considering previous studies (Mateu et al, 1997;Trovoada et al, 2001Trovoada et al, , 2004 and the present data, we conclude that STP population, despite its sub-Saharan African main input lineages, presents a relevant European genetic component, most evident on Forros.…”

Section: Admixture Estimatesmentioning

confidence: 59%

“…Previous studies on mtDNA of STP population revealed that the maternal influence was almost completely of sub-Saharan origin, clearly belonging to a West African cluster (Mateu et al, 1997;Trovoada et al, 2004). A study on b-globin haplotypes and eight autosomal markers (APOA1, AT3, FY, LPL, OCA2, RB1, Sb19.3, and GC) indicated that the peopling of Sã o Tomé provided the combination of diverse African contributions and European admixture (10.7%) that emerged from the overseas population relocations promoted by the Atlantic slave trade (Tomas, 2002).…”

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confidence: 99%

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Y‐chromosome lineages in São Tomé e Príncipe islands: Evidence of European influence

Gonçalves¹,

Spínola²,

Brehm³

2007

American J Hum Biol

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The Y-chromosome haplogroup composition of the population of São Tomé e Príncipe (STP) archipelago was analyzed using 25 biallelic markers and compared with populations 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 paternal lineages and R1b, typical of West Eurasia, represents 8.7% of the overall male population. Nevertheless, we detected in the population of STP a significant heterogeneous distribution 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 chromosomes 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.

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Section: Admixture Estimatesmentioning

confidence: 59%

mentioning

confidence: 99%

Y‐chromosome lineages in São Tomé e Príncipe islands: Evidence of European influence

Gonçalves¹,

Spínola²,

Brehm³

2007

American J Hum Biol

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“…The female component of Cabinda is exclusively Sub-Saharan, whereas the Y-biallelic markers revealed a significant European male contribution. This reflects a clear bias in the admixture process towards the mating of male Europeans with female Sub-Saharan Africans, similarly to what happened with other Portuguese ex-colonies, like Mozambique(Pereira et al 2002), Cape Verde(Gon- c¸alves et al 2003), Sa˜o Tome´and Prı´ncipe(Trovoada et al 2004) or even Brazil(Carvalho-Silva et al 2001).…”

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confidence: 65%

The genetic legacy of western Bantu migrations

et al. 2005

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There is little knowledge on the demographic impact of the western wave of the Bantu expansion. Only some predictions could be made based mainly on indirect archaeological, linguistic, and genetic evidences. Apart from the very limited available data on the mitochondrial DNA (mtDNA) side, there are not, however, Y-chromosome studies revealing-if any-the male contribution of western Bantu-farmers. To elucidate the still poorly characterized western Bantu expansion, we analyzed Y-chromosome (25 biallelic polymorphisms and 15 microsatellite markers) and mtDNA (hypervariable control regions I and II and selected coding region RFLPs) variation in a population of 110 individuals from southwest Africa, and compared it with a database of 2,708 Y-chromosome profiles and of 2,565 mtDNAs from all other regions of Africa. This study reveals (1) a dramatic displacement of male and female Khoisan-speaking groups in the southwest, since both the maternal and the paternal genetic pools were composed exclusively by types carried by Bantu-speakers; (2) a clear bias in the admixture process towards the mating of male Europeans with female Sub-Saharan Africans; (3) the assimilation of east African lineages by the southwest (mainly mtDNA-L3f and Y-chromosome-B2a lineages); and (4) signatures of recent male and female gene flow from the southeast into the southwest. The data also indicate that the western stream of the Bantu expansion was a more gradual process than the eastern counterpart, which likely involved multiple short dispersals.

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“…In studies of the populations of Cape Verde Islands [20,21] and Sao Tome Island [22,23], sex-specific genetic systems were used to elucidate both maternal and paternal origins. In the case of the Palenque, analysis of HLA autosomal markers and antigens [24,25], and recently NRY variation [26] has suggested a greater proportion of recent African descent (RAD) than other Colombian groups.…”

Section: Introductionmentioning

confidence: 99%

Palenque de San Basilio in Colombia: genetic data support an oral history of a paternal ancestry in Congo

et al. 2016

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The Palenque, a black community in rural Colombia, have an oral history of fugitive African slaves founding a free village near Cartagena in the seventeenth century. Recently, linguists have identified some 200 words in regular use that originate in a Kikongo language, with Yombe, mainly spoken in the Congo region, being the most likely source. The non-recombining portion of the Y chromosome (NRY) and mitochondrial DNA were analysed to establish whether there was greater similarity between present-day members of the Palenque and Yombe than between the Palenque and 42 other African groups (for all individuals, n ¼ 2799) from which forced slaves might have been taken. NRY data are consistent with the linguistic evidence that Yombe is the most likely group from which the original male settlers of Palenque came. Mitochondrial DNA data suggested substantial maternal sub-Saharan African ancestry and a strong founder effect but did not associate Palenque with any particular African group. In addition, based on cultural data including inhabitants' claims of linguistic differences, it has been hypothesized that the two districts of the village (Abajo and Arriba) have different origins, with Arriba founded by men originating in Congo and Abajo by those born in Colombia. Although significant genetic structuring distinguished the two from each other, no supporting evidence for this hypothesis was found.

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Pattern of mtDNA Variation in Three Populations from São Tomé e Príncipe

Cited by 33 publications

References 18 publications

Y‐chromosome lineages in São Tomé e Príncipe islands: Evidence of European influence

Y‐chromosome lineages in São Tomé e Príncipe islands: Evidence of European influence

The genetic legacy of western Bantu migrations

Palenque de San Basilio in Colombia: genetic data support an oral history of a paternal ancestry in Congo

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