Sub-Saharan Africans show widespread recent Eurasian and Khoesan admixture from gene-flow within last 7000 years.
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Coastal populations gained Eurasian haplotypes over last 7000 years. Eastern and Southern Niger-Congo speakers share Central West African ancestry from recent expansions. Most sub-Saharan groups share ancestry outside their geographic regions from gene-flow last 4000 years. Gambia and Mali ethnic groups mixed West African, European, and Asian ancestors around 2000 years ago. Bantu expansion spread Central West African genes south and east. 83% of African groups show admixture evidence via f3 statistic. Eurasian admixture recent in Fulani and East Africans within 1.5ky, older 2-5ky in Ethiopians, ancient >7.5ky in Yoruba. Hunter-gatherer ancestry widespread including ancient Khoesan in Igbo and recent in eastern/southern Africans. PC1 splits southern Khoesan from rest of Africa. PC2 separates Niger-Congo from Afroasiatic/Nilo-Saharan. PC3 clines west to east Niger-Congo speakers. Haplotypic TVD within Africa matches Europe-Asia differences despite low FST. West Africans admixed with Eurasian sources last 4ky. East African Niger-Congo speakers admixed with Eurasian and western Niger-Congo last 1-4ky. Southern Khoesan show recent Central West African ancestry. All African populations result from historical admixture events.

Negroes Genetics Evolution Science Demographics Race mixing

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