Reconstructing the origin of Andaman Islanders.
The origin of the Andaman "Negrito" and Nicobar "Mongoloid" populations has been ambiguous. Our analyses of complete mitochondrial DNA sequences from Onges and Great Andaman populations revealed two deeply branching clades that share their most recent common ancestor in founder haplogroup M, with lineages spread among India, Africa, East Asia, New Guinea, and Australia. This distribution suggests that these two clades have likely survived in genetic isolation since the initial settlement of the islands during an out-of-Africa migration by anatomically modern humans. In contrast, Nicobarese sequences illustrate a close genetic relationship with populations from Southeast Asia.
Thangaraj
Kumarasamy
K
Centre for Cellular and Molecular Biology, Hyderabad-500 007, India.
Chaubey
Gyaneshwer
G
Kivisild
Toomas
T
Reddy
Alla G
AG
Singh
Vijay Kumar
VK
Rasalkar
Avinash A
AA
Singh
Lalji
L
D000349:Africa; D001208:Asia; D001210:Asia, Southeastern; D041322:Chromosomes, Human, Y / Q000235:genetics; D004272:DNA, Mitochondrial / Q000235:genetics*; D004641:Emigration and Immigration; D005006:Ethnicity / Q000235:genetics*; D018703:Founder Effect; D040961:Genetic Drift; D005828:Genetics, Population; D005843:Geography; D006239:Haplotypes; D006801:Humans; D007194:India; D009154:Mutation; D010802:Phylogeny; D017422:Sequence Analysis, DNA
D004272:DNA, Mitochondrial