Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Genetics and Molecular Biology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000200004 |
Resumo: | The Amazon region of Brazil includes communities founded by escaped slaves, some of which still remain relatively isolated. We studied two such Afro-Brazilian communities (Pacoval and Curiau), in the rural area of Alenquer, Pará, and in the metropolitan region of Macapá, Amapá, respectively. Among 12 blood loci, alleles considered as markers of African ancestry, such as HBB*S, HBB*C, TF*D1, HP*2M, ABO*B, RH*D-, and CA2*2 were found at frequencies that are expected for populations with a predominantly African origin. Estimates of interethnic admixture indicated that the degree of the African component in Curiau (74%) is higher than that of Pacoval (44%); an Amerindian contribution was not detected in Curiau. Estimated values of African ancestry fit well with the degree of isolation and mobility of the communities. Pacoval exhibited a high proportion of immigrants among the parents and grandparents of the individuals studied, whereas persons living in Curiau exhibited a low level of mobility, despite its location in the metropolitan area of Macapá city, suggesting a relatively strong barrier against the interethnic admixture in this population. In addition, analysis of genetic data in a sub-sample consisting of individuals whose parents and grandparents were born in the study site, and that probably represents the populations two generations ago, indicated that gene flow from non-black people is not a recent event in both populations. |
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Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and CuriauThe Amazon region of Brazil includes communities founded by escaped slaves, some of which still remain relatively isolated. We studied two such Afro-Brazilian communities (Pacoval and Curiau), in the rural area of Alenquer, Pará, and in the metropolitan region of Macapá, Amapá, respectively. Among 12 blood loci, alleles considered as markers of African ancestry, such as HBB*S, HBB*C, TF*D1, HP*2M, ABO*B, RH*D-, and CA2*2 were found at frequencies that are expected for populations with a predominantly African origin. Estimates of interethnic admixture indicated that the degree of the African component in Curiau (74%) is higher than that of Pacoval (44%); an Amerindian contribution was not detected in Curiau. Estimated values of African ancestry fit well with the degree of isolation and mobility of the communities. Pacoval exhibited a high proportion of immigrants among the parents and grandparents of the individuals studied, whereas persons living in Curiau exhibited a low level of mobility, despite its location in the metropolitan area of Macapá city, suggesting a relatively strong barrier against the interethnic admixture in this population. In addition, analysis of genetic data in a sub-sample consisting of individuals whose parents and grandparents were born in the study site, and that probably represents the populations two generations ago, indicated that gene flow from non-black people is not a recent event in both populations.Sociedade Brasileira de Genética1999-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000200004Genetics and Molecular Biology v.22 n.2 1999reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47571999000200004info:eu-repo/semantics/openAccessGuerreiro,João FariasRibeiro-dos-Santos,Ândrea Kely CamposSantos,Eduardo José Melo dosVallinoto,Antonio Carlos RosárioCayres-Vallinoto,Izaura Maria VieiraAguiar,Gilberto Ferreira de SouzaSantos,Sidney Emanuel Batista doseng1999-08-26T00:00:00Zoai:scielo:S1415-47571999000200004Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:1999-08-26T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false |
dc.title.none.fl_str_mv |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau |
title |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau |
spellingShingle |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau Guerreiro,João Farias |
title_short |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau |
title_full |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau |
title_fullStr |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau |
title_full_unstemmed |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau |
title_sort |
Genetical-demographic data from two amazonian populations composed of descendants of african slaves: Pacoval and Curiau |
author |
Guerreiro,João Farias |
author_facet |
Guerreiro,João Farias Ribeiro-dos-Santos,Ândrea Kely Campos Santos,Eduardo José Melo dos Vallinoto,Antonio Carlos Rosário Cayres-Vallinoto,Izaura Maria Vieira Aguiar,Gilberto Ferreira de Souza Santos,Sidney Emanuel Batista dos |
author_role |
author |
author2 |
Ribeiro-dos-Santos,Ândrea Kely Campos Santos,Eduardo José Melo dos Vallinoto,Antonio Carlos Rosário Cayres-Vallinoto,Izaura Maria Vieira Aguiar,Gilberto Ferreira de Souza Santos,Sidney Emanuel Batista dos |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Guerreiro,João Farias Ribeiro-dos-Santos,Ândrea Kely Campos Santos,Eduardo José Melo dos Vallinoto,Antonio Carlos Rosário Cayres-Vallinoto,Izaura Maria Vieira Aguiar,Gilberto Ferreira de Souza Santos,Sidney Emanuel Batista dos |
description |
The Amazon region of Brazil includes communities founded by escaped slaves, some of which still remain relatively isolated. We studied two such Afro-Brazilian communities (Pacoval and Curiau), in the rural area of Alenquer, Pará, and in the metropolitan region of Macapá, Amapá, respectively. Among 12 blood loci, alleles considered as markers of African ancestry, such as HBB*S, HBB*C, TF*D1, HP*2M, ABO*B, RH*D-, and CA2*2 were found at frequencies that are expected for populations with a predominantly African origin. Estimates of interethnic admixture indicated that the degree of the African component in Curiau (74%) is higher than that of Pacoval (44%); an Amerindian contribution was not detected in Curiau. Estimated values of African ancestry fit well with the degree of isolation and mobility of the communities. Pacoval exhibited a high proportion of immigrants among the parents and grandparents of the individuals studied, whereas persons living in Curiau exhibited a low level of mobility, despite its location in the metropolitan area of Macapá city, suggesting a relatively strong barrier against the interethnic admixture in this population. In addition, analysis of genetic data in a sub-sample consisting of individuals whose parents and grandparents were born in the study site, and that probably represents the populations two generations ago, indicated that gene flow from non-black people is not a recent event in both populations. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000200004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000200004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1415-47571999000200004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
dc.source.none.fl_str_mv |
Genetics and Molecular Biology v.22 n.2 1999 reponame:Genetics and Molecular Biology instname:Sociedade Brasileira de Genética (SBG) instacron:SBG |
instname_str |
Sociedade Brasileira de Genética (SBG) |
instacron_str |
SBG |
institution |
SBG |
reponame_str |
Genetics and Molecular Biology |
collection |
Genetics and Molecular Biology |
repository.name.fl_str_mv |
Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG) |
repository.mail.fl_str_mv |
||editor@gmb.org.br |
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1752122377342287872 |