Mitochondrial DNA mapping of social-biological interactions in Brazilian Amazonian African-descendant populations
Mitochondrial DNA mapping of social-biological interactions in Brazilian Amazonian African-descendant populations
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DOI：
10.1590/s1415-47572008000100002
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发表时间：
2008-01-01
影响因子：
2.1
通讯作者：
Ribeiro-dos-Santos, Ândrea Kely Campos
中科院分区：
文献类型：
--
作者：
Carvalho, Bruno Maia;Bortolini, Maria Cátira;Ribeiro-dos-Santos, Ândrea Kely Campos
巴西亚马逊地区人口的形成历史上涉及三个主要民族：美洲印第安人、非洲人和欧洲人。这导致使用经典多态性和分子标记进行遗传研究。为了更好地了解巴西亚马逊地区人类群体的遗传变异和微观进化过程，我们使用线粒体 DNA 调查了来自 5 个亚马逊非洲裔社区的 159 名与母系无关的个体。线粒体谱系分布表明，非洲人（L0、L1、L2 和 L3）贡献了 50.2%，美洲印第安人（单倍群 A、B、C 和 D）贡献了 46.6%，欧洲人贡献了 1.3%。这些结果表明美洲印第安人和非洲血统群体具有高度的遗传多样性，这表明巴西亚马逊非洲后裔群体反映了来自不同亚马逊土著部落的美洲印第安妇女和来自非洲不同地理区域的被带到巴西作为奴隶的非洲妇女可能的人口融合。本研究部分描绘了亚马逊非洲后裔社区形成和扩张过程中发生的历史生物和社会相互作用。
The formation of the Brazilian Amazonian population has historically involved three main ethnic groups, Amerindian, African and European. This has resulted in genetic investigations having been carried out using classical polymorphisms and molecular markers. To better understand the genetic variability and the micro-evolutionary processes acting in human groups in the Brazilian Amazon region we used mitochondrial DNA to investigate 159 maternally unrelated individuals from five Amazonian African-descendant communities. The mitochondrial lineage distribution indicated a contribution of 50.2% from Africans (L0, L1, L2, and L3), 46.6% from Amerindians (haplogroups A, B, C and D) and a small European contribution of 1.3%. These results indicated high genetic diversity in the Amerindian and African lineage groups, suggesting that the Brazilian Amazonian African-descendant populations reflect a possible population amalgamation of Amerindian women from different Amazonian indigenous tribes and African women from different geographic regions of Africa who had been brought to Brazil as slaves. The present study partially mapped the historical biological and social interactions that had occurred during the formation and expansion of Amazonian African-descendant communities.