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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 Swenet: [QB] Sometimes it's better to revisit and reread your notes than to speak off the top from what you remember. Above I was arguing that U6 originated somewhere in Central Asia, and that UP European U6* and African U6abcd are two subclades separating from a Central Asian U6 carrying parent population that was on its way to West Eurasia. This is a wrongly remembered version of my original thoughts on U6. In my original notes this is what I had in mind. U6 is analogous to R-V88, in that the both derive from (Central) Asian parents (mtDNA U and Y-DNA R), but also in that both were originally thought to be African, but have now turned out to have older offshoots in West Eurasia than in Africa. The older West Eurasian offshoots make sense because West Eurasia lies in between Central Asia and Africa. The credible and latest estimates assign U6 a date of ~37ky old. If this is accurate (a big IF), then the Levantine Aurignacian comes into focus as an archaeological correlate of U6. And if the Levantine Aurignacian really is associated with U6, then U6 must have originated fully inside the Levant as Elite Diasporan was saying (not in Central Asia as I was alluding to above). The Levantine Aurignacian starts exactly around the time the latest research suggests U6 originated. See table 1, fig 2 and fig 3: Radiocarbon chronology of Manot Cave, Israel and Upper Paleolithic dispersals http://advances.sciencemag.org/content/3/11/e1701450/tab-pdf A couple of implications of this scenario that U6 itself (not just a U6 subclade) was spread by the Levantine Aurignacian people: --In this scenario U6abd and some stage of pre-U6c represent the entry into Africa as two already differentiated branches, not as a single U6abcd clade as I was suggesting earlier --Since U6abd is 32ky old according Behar et al., the entry into Africa by U6abd and pre-U6c must have taken place around that time. They could have been attracted by the 33ky old wet spell in North Africa. By 32kya the Levantine Aurignacian had changed or declined (depending on how one interprets the archaeological record), which could indicate a partial displacement of Levantine Aurignacian population. This fits the 32ky old backmigration date well --This relatively late entry into Africa explains why UP European U6* is basal compared to U6abd and U6c --In this scenario mtDNA U was the Central Asian parent population, not U6 as I was arguing earlier --In this scenario UP European U6* migrated from the Levant, not directly from the aforementioned Central Asian parent population I may end up being wrong in my reading, but this is more accurate representation of my original thoughts on Asia, the Levantine Aurignacian and U6. [/QB][/QUOTE]
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