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Beja of Sudan: an intermediate position between Africans and non-Africans 2014
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[QUOTE]Originally posted by the lioness,: [QB] . . [b]The Episode of Genetic Drift Defining the Migration of Humans out of Africa Is Derived from a Large East African Population Size[/b] Nuha Elhassan , Eyoab Iyasu Gebremeskel , Mohamed Ali Elnour, Dan Isabirye, John Okello, Ayman Hussien, Dominic Kwiatksowski, Jibril Hirbo, Sara Tishkoff, Muntaser E. Ibrahim Published: May 20, 2014 "Both MDS plots discriminated between Africans and non-Africans in their first coordinate, although in the IBS plot where the variance measure is more pronounced the drift effect and low Ne is prominent. In the FST based MDS the 2nd coordinate differentiates between Sudanese and the rest of Africa (except San), and between Asians and Europeans. Interestingly Beja population from Sudan maintains an intermediate position between Africans and non-Africans in both plots." [IMG]https://i.imgbox.com/VXnmibc6.png[/IMG] http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0097674 _________________________________________ Arabs, Nubians and Beja of the Sudan, and Ethiopians show high frequencies of the allele T/G-13915, which is the major LP variant among the nomadic Arabs in Arabian Peninsula [23]. This supports the historical link and bidirectional migration of nomadic populations between Arabia and East Africa. And the significant frequencies of this allele of the nomadic Arabs among Nubians of the Sudan may be due to the gene flow form Afro-Asiatic into this Nilo-Saharan group. Nubians reside at the entering port of the Sudan along the Nile at the border with Egypt, where they were influenced by Arabs as a direct result of the penetration of large numbers of Arabs from Arabia and Egypt into the Sudan over a long period of time following the arrival of Islam around 651 AD [29]. --Genetic diversity of lactase persistence in East African populations Hassan et al. 2016 https://bmcresnotes.biomedcentral.com/articles/10.1186/s13104-015-1833-1 [/QB][/QUOTE]
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