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Genomic Ancestry of North Africans Supports Back-to-Africa Migrations Brenna M. Henn
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[QUOTE]Originally posted by Swenet: [QB] [QUOTE]Originally posted by Swenet: Wow. Xyyman is questioning my intelligence. That [i]really[/i] keeps me awake at night. :rolleyes: To the rest of the forum: [QUOTE]The dates of admixture (assuming 30 years per generation)42 are reported in Table 1. Notably, in most of the Semitic, Cushitic, and Omotic populations, the admixture of African and non-African ancestry components dates to 2.5–3 kya, [b]whereas in North Africa, the admixture dates are ~2 ky more recent, clustering around 1 kya, consistent with previous reports.[/b][/QUOTE]--Pagani et al 2012 While I don't believe this represents the first and only admixture date, Pagani et al nonetheless picked up on admixture in North Africa that coincides with the Islamic invasion. The results of other authors agree with the aforementioned time stamp: [QUOTE]Under a pulse model of migration, a [b]significant increase in gene flow likely occurred ~700 ya, after the Arabic expansion into North Africa 1,400 ya.[/b][/QUOTE]--Henn et al 2012[/QUOTE]After reading the passage in its full context, the aforementioned Henn et al reference appears not to refer to the Arabic expansion. What they say about Near Eastern ancestry in North African populations is: [QUOTE]More recently, the substantial, east-to-west decline of Near Eastern ancestry (Figure 1A) [b]could represent a defined migration associated with Arab conquest 1,400 ya or merely gene flow occurring gradually among neighboring populations along a North African | Arabian Peninsula transect.[/b][/QUOTE]--Henn et al 2012 [/QB][/QUOTE]
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