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From: steven perkins <>
Subject: [DNA] Article: Linking the sub-Saharan and West Eurasian genepools: maternal and paternal heritage of the Tuareg nomadsfrom the African Sahel
Date: Tue, 23 Mar 2010 20:30:26 -0400


Eur J Hum Genet. 2010 Mar 17. [Epub ahead of print]
http://www.nature.com/ejhg/journal/vaop/ncurrent/abs/ejhg201021a.html

Linking the sub-Saharan and West Eurasian gene pools: maternal and
paternal heritage of the Tuareg nomads from the African Sahel.

Pereira L, Cerný V, Cerezo M, Silva NM, Hájek M, Vašíková A, Kujanová
M, Brdička R, Salas A.

[1] Instituto de Patologia e Imunologia Molecular da Universidade do
Porto (IPATIMUP), Porto, Portugal [2] Faculdade de Medicina da
Universidade do Porto, Porto, Portugal.

The Tuareg presently live in the Sahara and the Sahel. Their ancestors
are commonly believed to be the Garamantes of the Libyan Fezzan, ever
since it was suggested by authors of antiquity. Biological evidence,
based on classical genetic markers, however, indicates kinship with
the Beja of Eastern Sudan. Our study of mitochondrial DNA (mtDNA)
sequences and Y chromosome SNPs of three different southern Tuareg
groups from Mali, Burkina Faso and the Republic of Niger reveals a
West Eurasian-North African composition of their gene pool. The data
show that certain genetic lineages could not have been introduced into
this population earlier than approximately 9000 years ago whereas
local expansions establish a minimal date at around 3000 years ago.
Some of the mtDNA haplogroups observed in the Tuareg population were
involved in the post-Last Glacial Maximum human expansion from Iberian
refugia towards both Europe and North Africa. Interestingly, no Near
Eastern mtDNA lineages connected with the Neolithic expansion have
been observed in our population sample. On the other hand, the Y
chromosome SNPs data show that the paternal lineages can very probably
be traced to the Near Eastern Neolithic demic expansion towards North
Africa, a period that is otherwise concordant with the above-mentioned
mtDNA expansion. The time frame for the migration of the Tuareg
towards the African Sahel belt overlaps that of early Holocene
climatic changes across the Sahara (from the optimal greening
approximately 10 000 YBP to the extant aridity beginning at
approximately 6000 YBP) and the migrations of other African nomadic
peoples in the area.

European Journal of Human Genetics advance online publication, 17
March 2010; doi:10.1038/ejhg.2010.21.

PMID: 20234393 [PubMed - as supplied by publisher]

--
Steven C. Perkins
http://stevencperkins.com/
Online Journal of Genetics and Genealogy
http://jgg-online.blogspot.com/
Steven C. Perkins' Genealogy Page
http://stevencperkins.com/genealogy.html
Steven C. Perkins' Genealogy Blog
http://scpgen.blogspot.com/


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