Abstract
Data on the frequency of the mtDNA region V deletion were used to estimate the relative maternal contribution from the parental populations to the gene pools of the two Black communities of Rio Cayapas and Viche in northern Ecuador. Ethnohistorical records and nuclear DNA data indicate that these populations are hybrids of West African and Amerindian populations. The unique distribution of the DNA marker in these parental groups provided good admixture estimates. The fraction of mtDNA of Amerindian origin in the population of Rio Cayapas is quite small (8%±5%), whereas in the community of Viche the native Americans contributed the major portion of the gene pool (51%±15). The mtDNA estimate for Rio Cayapas is similar to that of some protein polymorphisms, which confirms the cultural and genetic isolation of this community from the neighboring native population. On the other hand, the admixture value obtained from nuclear genes in Viche is statistically different from the estimate obtained from mtDNA data. This supports the traditional belief, gathered from historical records and cultural data, that the contribution from Indian females was higher than that of Indian males, at least in the primary settlements of the African-American population of Esmeraldas.
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Rickards, O. Analysis of the region V mitochondrial marker in two Black communities of Ecuador, and in their parental populations. Hum. Evol. 10, 5–16 (1995). https://doi.org/10.1007/BF02437510
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DOI: https://doi.org/10.1007/BF02437510