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Old 28th January 2015, 11:22 AM
PNGarrison PNGarrison is offline
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Static and moving frontiers: the genetic landscape of southern african bantu-speaking

Mol Biol Evol. 2015 Jan;32(1):29-43. doi: 10.1093/molbev/msu263. Epub 2014 Sep 14.
Static and moving frontiers: the genetic landscape of southern african bantu-speaking populations.
Marks SJ1, Montinaro F2, Levy H1, Brisighelli F3, Ferri G4, Bertoncini S5, Batini C6, Busby GB1, Arthur C7, Mitchell P8, Stewart BA9, Oosthuizen O10, Oosthuizen E10, D'Amato ME11, Davison S11, Pascali V3, Capelli C12.
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A consensus on Bantu-speaking populations being genetically similar has emerged in the last few years, but the demographic scenarios associated with their dispersal are still a matter of debate. The frontier model proposed by archeologists postulates different degrees of interaction among incoming agropastoralist and resident foraging groups in the presence of "static" and "moving" frontiers. By combining mitochondrial DNA and Y chromosome data collected from several southern African populations, we show that Bantu-speaking populations from regions characterized by a moving frontier developing after a long-term static frontier have larger hunter-gatherer contributions than groups from areas where a static frontier was not followed by further spatial expansion. Differences in the female and male components suggest that the process of assimilation of the long-term resident groups into agropastoralist societies was gender biased. Our results show that the diffusion of Bantu languages and culture in Southern Africa was a process more complex than previously described and suggest that the admixture dynamics between farmers and foragers played an important role in shaping the current patterns of genetic diversity.
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