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OT: R*-M173 back migration
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[QUOTE]Originally posted by Mystery Solver: [QB] [QUOTE]Originally posted by Quetzalcoatl: By suggesting that 20 to 30,000 years ago there was a back migration from Asia to Africa of a population with “...new skills, technology or perhaps social/ritual systems— spread out across Africa and gradually displaced or assimilated many of its resident populations. This hypothesis was first put forward in its modern form by Kingdon (1993), although in the absence of genetic evidence it was little more than speculation. But if the argument is accepted, these early returnees would be the source of Nilo-Saharan, as this is the oldest of the phyla apart from Khoesan (p. 183).” . . . [/QUOTE]*Nonsensical. First of, the marker TMRCA is linked to the Upper Paleolithic. Predynastic Nile Valley complexes, which came about in the Neolithic-[i]Holocene[/i], have been shown ad nauseam here to have evolved from in situ processes. Notwithstanding gene flow from the eastern neighbours, Northeast Africa is still largely of PN2 derived M78 lineages, showing the region to be home to the ancestral lineages of those that spread to their neighbours, southward, northward, westward and eastward. Therefore, the populations therein have definitely not been displaced. *M78 are derivatives of M35, which is of sub-Sahara East African origin. *R1*-M173 is also rare, even more so out of Africa, with the highest incidence being in north Cameroon - amongst its Niger-Congo, Nilo-Saharan and Afrasan language speakers. *The studies done on Nilo-Saharan speakers show them to be largely those of early African lineages, which aren't found outside of Africa, e.g. Hg A and B, and other lineages involve PN2 transition derivatives, which again is of African provenance. *Nilo-Saharan is exclusively African; it isn't found elsewhere. As for R1*, we've been through its particulars a number of times now, e.g.: [URL=http://www.egyptsearch.com/forums/ultimatebb.cgi?ubb=get_topic;f=8;t=005205;p=1#000038] Chadic speakers African and Genetics[/URL] [URL=http://www.egyptsearch.com/forums/ultimatebb.cgi?ubb=get_topic;f=8;t=005208;p=1#000000]What are the major Y-chromosome haplogroups?[/URL] [/QB][/QUOTE]
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