Hem > Antropologi > Out-of-Africa-teorin ifrågasätts i ny artikel

Out-of-Africa-teorin ifrågasätts i ny artikel

juni 6, 2012

Dagens haplogruppers föregångare ska ha sitt ursprung i östra Europa eller i Mellanöstern. Haplogrupp A och Beta härstammar från en haplogrupp Alfa. Beta förgrenar sig i B-R2. Haplogrupp A och B vandrade in i Afrika och blandades. Antagligen också med arkaiska människor, därav att den genetiska mångfalden är som störst i Afrika. Haplogrupp Alfa och Beta ska ha uppstått i Östra Europa eller i Mellanöstern.

Haplogrupp A är afrikansk och cirka 132000 år, Haplogrupperna F-R+T är europeiska och 58000 år, Haplogrupp B är 46000 år och afrikansk, Mongoloida och Austronesiska haplogruppen C är 36000 år, Mellanösterns haplogrupper D+E 42000 år, Haplogrupp Alfa beräknas vara 160000 år.

Haplogrupp Alfa och Beta är ancestrala haplogrupper.

Artikel (Länk för nedladdning finns)
Seven thousand five hundred fifty-six (7556) haplotypes of 46 subclades in 17 major haplogroups were considered in terms of their base (ancestral) haplotypes and timespans to their common ancestors, for the purposes of designing of time-balanced haplogroup tree. It was found that African haplogroup A (originated 132,000 ± 12,000 years before present) is very remote time-wise from all other haplogroups, which have a separate common ancestor, named β-haplogroup, and originated 64,000 ± 6000 ybp. It includes a family of Europeoid (Caucasoid) haplogroups from F through T that originated 58,000 ± 5000 ybp. A downstream common ancestor for haplogroup A and β-haplogroup, coined the α-haplogroup emerged 160,000 ± 12,000 ybp. A territorial origin of haplogroups α- and β-remains unknown; however, the most likely origin for each of them is a vast triangle stretched from Central Europe in the west through the Russian Plain to the east and to Levant to the south. Haplogroup B is descended from β-haplogroup (and not from haplogroup A, from which it is very distant, and separated by as much as 123,000 years of “lat- eral” mutational evolution) likely migrated to Africa after 46,000 ybp. The finding that the Europeoid haplogroups did not descend from “African” haplogroups A or B is supported by the fact that bearers of the Europeoid haplogroups, as well as all non-African haplogroups do not carry either SNPs M91, P97, M31, P82, M23, M114, P262, M32, M59, P289, P291, P102, M13, M171, M118 (haplogroup A and its subclades SNPs) or M60, M181, P90 (haplogroup B), as it was shown recently in “Walk through Y” FTDNA Project (the reference is incorporated therein) on several hundred people from various haplogroups.

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