Interethnic genetic differentiation: GM polymorphism in eastern Senegal. |
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Authors: | M Blanc A Sanchez-Mazas N H Van Blyenburgh A Sevin G Pison A Langaney |
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Affiliation: | Centre d'Hémotypologie du C.N.S.R., H?pital Purpan, Toulouse. |
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Abstract: | Analysis of GM polymorphism has been performed on 1,806 individuals representing three sympatric ethnic groups--Bedik, Fulani, and Mandenkalu--of eastern Senegal. Haplotype frequencies estimated by maximum likelihood have been used to compute common genetic pools between the three samples and a number of other sub-Saharan African populations. Despite extreme linguistic and sociocultural differentiations and very high levels of endogamy, especially in the Bedik and Niokholo Mandenkalu, the three populations share about 90%-95% of their haplotype frequencies in a system which commonly provides strong genetic differentiations. This supports the view that, despite its importance at a large continental scale level, as it is discussed for a set of populations from many regions of sub-Saharan Africa, sociocultural differentiation usually has little effect on local genetic diversity. |
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