АвторТема: Rare European maternal lineages W, I, and X2 in the past and present  (Прочитано 1033 раз)

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Оффлайн ValikhanАвтор темы

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  • Y-ДНК: N1c1d1 - L1034 (L1032, L1033)
  • мтДНК: B5a1a
http://www.mnhn.fr/mnhn/ecoanthropologie/Porto2011/Porto2011_program.html#LEE
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Studies utilizing ancient DNA to examine past populations in Europe have increased dramatically in recent years. Specifically, mitochondrial DNA (mtDNA) sequences for over 100 individuals in prehistoric Europe have been sequenced and published. Scholars have intensively focused on the so-called Neolithic transition in Europe, the transformation from hunter-gatherer lifestyle to agro-pastoralism, and continue to debate whether the process was a result of population movement or cultural dispersion. Both hypotheses continue to be tested and genetics analyses from past and present populations have suggested a complex  movement of people and cultures across Eurasia. This work focuses on the mtDNA  haplogroups identified in past European populations that are rare in the present, haplogroups W, I, and X2. New data will be presented from Neolithic Funnel Beaker collective burials sites, a late Neolithic Bell Beaker site, and an Iron Age Halstatt site in Germany, in which the three maternal lineages are identified. Among the published European Neolithic data, haplogroup X2 appears in late Neolithic sites in Germany and France but not in the earlier LBK culture. Haplogroup X2 shows an intriguing phylogenetic landscape with a wide  geographical distribution at an overall low frequency, but on the other hand, pockets of high diversity and frequency among certain modern western Eurasian populations have been  described. The discussion focuses on whether the presence of the three haplogroups in the  past is a result of ascertainment bias or some viable population movement.

 

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