АвторТема: Genetic and demographic implications of the Bantu expansion: insights from human  (Прочитано 1990 раз)

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Оффлайн mouglleyАвтор темы

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  • Y-ДНК: N1c1-L1025
  • мтДНК: J1c3
Ещё одна публикация за банту-R1b:
Genetic and demographic implications of the Bantu expansion: insights from human paternal lineages Gemma Berniell-Lee, Francesc Calafell1, Elena Bosch, Evelyne Heyer, Lucas Sica, Patrick Mouguiama-Daouda, Lolke van der Veen, Jean-Marie Hombert, Lluis Quintana-Murci and David Comas

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The expansion of Bantu languages, which started around 5,000 years before present (YBP) in west/central Africa and spread all throughout sub-Saharan Africa, may represent one of the major and most rapid demographic movements in the history of the human species. Although the genetic footprints of this expansion have been unmasked through the analyses of the maternally-inherited mitochondrial (mtDNA) lineages, information on the genetic impact of this massive movement and on the genetic composition of pre-Bantu populations is still scarce.

Here we analyze an extensive collection of Y-chromosome markers - 41 SNPs and 18 STRs - in 883 individuals from 22 Bantu-speaking agriculturalist populations and 3 Pygmy hunter-gatherer populations from Gabon and Cameroon. Our data reveal a recent origin for most paternal lineages in west Central African populations most likely resulting from the expansion of Bantu-speaking farmers that erased the more ancient Y-chromosome diversity found in this area. However, some traces of ancient paternal lineages are observed in these populations, mainly among hunter-gatherers. These results are at odds with those obtained from mtDNA analyses, where high frequencies of ancient maternal lineages are observed, and substantial maternal gene flow from hunter-gatherers to Bantu farmers has been suggested. These differences are most likely explained by socio-cultural factors such as patrilocality. We also find the intriguing presence of paternal lineages belonging to Eurasian haplogroup R1b1*, which might represent footprints of demographic expansions in central Africa not directly related to the Bantu expansion.
« Последнее редактирование: 21 Июнь 2009, 17:44:19 от mouglley »

 

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