Soundjata Kéita Super Posteur
Inscrit le: 06 Mai 2005 Messages: 1655 Localisation: Au sein de mon Empire
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Posté le: Lun 23 Mai 2005 20:23 Sujet du message: mtDNA Analysis of Nile River Valley Populations... |
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mtDNA Analysis of Nile River Valley Populations: A Genetic Corridor or a Barrier to Migration?
http://www.journals.uchicago.edu/AJHG/journal/issues/v64n4/980585/980585.html
En gros une étude portant sur la présence de deux types de gènes dans la population le long du Nil et mettrait en évidence le caractère bidirectionnelle des migrations le long de cet axe à partir d'études statistiques. Elle montrerait en particulier que la migration nord-sud fut antérieure à celle sud-nord.
La conclusion en est assez surprenante :
"Nonetheless, we can infer that the migration of northern mtDNA types to the south is older than the migration of southern mtDNA types to the north (or that there has been less gene flow from north to south than from south to north along the Nile River Valley) and that Egypt and Nubia have had more genetic contact than either has had with the southern Sudan. Moreover, we can tentatively infer that these migrations occurred recently enough to fall within the period of the documented historical record of human populations in the Nile River Valley. Thus, it is tempting to try to relate these migrations to specific historical events (Shaw and Nicholson 1995). For example, the migration from north to south may coincide with the Pharaonic colonization of Nubia, which occurred initially during the Middle Kingdom (12th Dynasty, 1991-1785 B.C.) and more permanently during the New Kingdom, from the reign of Thotmosis III (1490-1437 B.C.). The migration from south to north may coincide with the 25th Dynasty (730-655 B.C.), when kings from Napata in Nubia conquered Egypt. Of course, additional migrations documented during the Ptolemeic, Roman, and Arabic times are also likely to have contributed to the current distribution of mtDNA types along the Nile River Valley. "
C'est pas l'inverse plutôt ? _________________ La vérité rougit l'oeil, mais ne saurait le transpercer
Pour la Renaissance du Gondwana |
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