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Pleistocene North African genomes link Near Eastern and sub-Saharan African human pop
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[QUOTE]Originally posted by Doug M: [QB] [QUOTE] Haplogroup U descends from the haplogroup R mtDNA branch of the phylogenetic tree. The defining mutations (A11467G, A12308G, G12372A) are estimated to have arisen between 43,000 and 50,000 years ago, in the early Upper Paleolithic (around 46,530 ± 3,290 years before present, with a 95% confidence interval per Behar et al., 2012). Ancient DNA classified as belonging to the U* mitochondrial haplogroup has been recovered from human skeletal remains found in Western Siberia, which have been dated to c. 45,000 years ago.[4][/QUOTE]From Wikipedia Just because haplogroup U was found in Siberia 43,000 years ago does not mean it originated there. The problem here is that the time depth beyond 43,000 years ago is so great that the odds of finding other older remains with U DNA decreases. But if you have U in Siberia and U in Romania and U in Taforalt, the most logical explanation is that all of these descend from a common ancestral population that lived between Africa, Arabia and the Levant upwards of 50 to 60 thousand years ago, which is right around the time of OOA. The idea that Siberians backmigrated all the way back to Europe and then Africa to re introduce U to the continent is far fetched and illogical. This also means by extension that the parent of U, which is haplogroup R also likely arose in Africa as well as you are talking about an age of 66 thousand years old. When it comes to "basal" lineages like U and R the odds are that they arose in Africa among migrating populations or populations that were once more widespread in Africa (ie. in North Africa) but later displaced by environmental and other circumstances (the Sahara pump). [/QB][/QUOTE]
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