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Shipwrecks and founder effects: Divergent demographic histories reflected in Caribbean mtDNA

Salas, Antonio, Richards, Martin B., Lareu, María-Victoria, Sobrino, Beatriz, Silva, Sandra, Matamoros, Mireya, Macaulay, Vincent and Carracedo, Ángel (2005) Shipwrecks and founder effects: Divergent demographic histories reflected in Caribbean mtDNA. American Journal of Physical Anthropology, 128 (4). pp. 855-860. ISSN 0002-9483

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During the period of the Atlantic slave trade (15th–19th centuries), millions of people were forced to move from Africa to many American destinations, changing dramatically the human landscape of the Americas. Here, we analyze mitochondrial DNA from two different American populations with African ancestry, with hitherto unknown European and Native American components. On the basis of historical records, African-Americans from Chocó (Colombia) and the Garífunas (or “Black Carib”) of Honduras are likely to have had very different demographic histories, with a significant founder effect in the formation of the latter. Both the common features and differences are reflected in their mtDNA composition. Both show a minor component (∼16%) from Native Central/South Americans and a larger component (∼84%) from sub-Saharan Africans. The latter component is very diverse in the African-Americans from Chocó, similar to that of sub-Saharan Africans, but much less so in the Garífunas, with several mtDNA types elevated to high frequency, suggesting the action of genetic drift

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history > QH426 Genetics
Schools: School of Applied Sciences
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Depositing User: Sara Taylor
Date Deposited: 14 Aug 2014 13:24
Last Modified: 28 Aug 2021 11:41


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