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Kumarasamy Thangaraj,1Gyaneshwer Chaubey,1Toomas Kivisild,2Alla G. Reddy,1Vijay Kumar Singh,1Avinash A. Rasalkar,1Lalji Singh1*
The origin of the Andaman "Negrito" and Nicobar "Mongoloid"populations has been ambiguous. Our analyses of complete mitochondrialDNA sequences from Onges and Great Andaman populations revealedtwo deeply branching clades that share their most recent commonancestor in founder haplogroup M, with lineages spread amongIndia, Africa, East Asia, New Guinea, and Australia. This distributionsuggests that these two clades have likely survived in geneticisolation since the initial settlement of the islands duringan out-of-Africa migration by anatomically modern humans. Incontrast, Nicobarese sequences illustrate a close genetic relationshipwith populations from Southeast Asia.
1 Centre for Cellular and Molecular Biology, Hyderabad-500 007, India. 2 Estonian Biocenter, Riia 23, Tartu-51010, Estonia.
* To whom correspondence should be addressed. E-mail: lalji{at}ccmb.res.in
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