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Molecular Biology and Evolution, Vol 15, 1108-1114, Copyright © 1998 by Society for Molecular Biology and Evolution

ORIGINAL ARTICLE

Phylogenetic resolution of complex mutational features at Y-STR DYS390 in aboriginal Australians and Papuans

P Forster, M Kayser, E Meyer, L Roewer, H Pfeiffer, H Benkmann and B Brinkmann
Institute of Legal Medicine, University of Munster, Germany.

Y-chromosomal short tandem repeats (STRs) are used for the study of male aspects of human evolution as well as for forensic applications and paternity testing. Both applications require an understanding of the underlying mutational mechanisms that create variability. We describe complex mutations at the substructured DYS390 STR locus in 97 natives of the New Guinea/Australian region. Sequencing of short alleles in these populations indicates multirepeat deletions. All samples are further characterized using the five additional Y-STR loci DYS19, DXYS156-Y, DYS391, DYS392, and DYS393. Phylogenetic analysis of the resulting haplotypes yields ethnically specific clusters predating the settlement of Australia and Papua New Guinea (although archaic Homo sapiens or Homo erectus lineages are absent). The phylogeny confirms that DYS390 violates the stepwise mutation model and demonstrates that the DYS390 locus mutates relatively rapidly and retains its variability after structural change.
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