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Post by egypt1101 on Jan 23, 2012 20:33:27 GMT -5
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Post by Noah on Jan 24, 2012 4:41:25 GMT -5
A very interesting read. It indeed seems to corroborate much of what has been written on this website, especially regarding the West Eurasian affinities of the original haplogroup E bearers. This is evidenced by the following quote on the Berber-speaking groups, who on average have the highest global frequencies of the E1b1b clade: "Proposed migrations between North Africa and neighboring regions have included Paleolithic gene flow from the Near East, an Arabic migration across the whole of North Africa 1,400 years ago (ya), and trans-Saharan transport of slaves from sub-Saharan Africa. Historical records, archaeology, and mitochondrial and Y-chromosome DNA have been marshaled in support of one theory or another, but there is little consensus regarding the overall genetic background of North African populations or their origin and expansion. We characterize the patterns of genetic variation in North Africa using ~730,000 single nucleotide polymorphisms from across the genome for seven populations. We observe two distinct, opposite gradients of ancestry: an east-to-west increase in likely autochthonous North African ancestry and an east-to-west decrease in likely Near Eastern Arabic ancestry. The indigenous North African ancestry may have been more common in Berber populations and appears most closely related to populations outside of Africa, but divergence between Maghrebi peoples and Near Eastern/Europeans likely precedes the Holocene (>12,000 ya). We also find significant signatures of sub-Saharan African ancestry that vary substantially among populations. These sub-Saharan ancestries appear to be a recent introduction into North African populations, dating to about 1,200 years ago in southern Morocco and about 750 years ago into Egypt, possibly reflecting the patterns of the trans-Saharan slave trade that occurred during this period." I'd like to give the paper a detailed treatment sometime, once I finish up on another thing I'm working on. But the quotes certainly speak volumes.
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