Principal component analysis of the populations from the Sudanese region in the context of the African continent. Plot shows a) PC1 and PC2 and b) PC2 and PC3 and the variation explained by them. Sudanese populations cluster in four groups according to their geographic location, with PC1 representing a north-east to south-west axis in East Africa. Populations not genotyped in this study are shown with grey filled symbols. MKK = Maasai from Kinyawa, Kenya; LWK = Luhya from Webuye, Kenya; YRI = Yoruba from Ibadan, Nigeria.
Begoña Dobon, Hisham Y. Hassan, Hafid Laayouni, Pierre Luisi, Isis Ricaño-Ponce, Alexandra Zhernakova, Cisca Wijmenga, Hanan Tahir, David Comas, Mihai G. Netea &amp; Jaume Bertranpetit
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Dobon B, Hassan HY, Laayouni H, et al. The genetics of East African populations: a Nilo-Saharan component in the African genetic landscape. Scientific Reports. 2015;5:9996. doi:10.1038/srep09996. <a rel="nofollow" class="external free" href="http://www.nature.com/articles/srep09996">http://www.nature.com/articles/srep09996</a>