A long-anticipated new version of the Y-Chromosome Tree will be released in the journal Genome Research tomorrow (Wednesday, April 2nd). In the paper, scientists from the University of Arizona and Stanford University use recent SNP data and research to reformulate the familiar Y-chromosome tree (see, for example, the current tree at ISOGG). Here is the full text of the press release.Â The paper should appear here as soon as it is made available by Genome Research tomorrow.
From the press release:
In an article published online today in Genome Research (www.genome.org), scientists have utilized recently described genetic variations on the part of the Y chromosome that does not undergo recombination to significantly update and refine the Y chromosome haplogroup tree. The print version of this work will appear in the May issue of Genome Research, accompanied by a special poster of the new tree.
Hammerâ€™s group integrated more than 300 new markers into the tree, which allowed the resolution of many features that were not yet discernable, as well as the revision of previous arrangements.
Furthermore, Hammer explains that this work has resulted in the addition of two new major haplogroups, S and T, with novel insights into the ancestry of both. â€œHaplogroup T, the clade that Thomas Jeffersonâ€™s Y chromosome belongs to, has a Middle Eastern affinity, while haplogroup S is found in Indonesia and Oceania.â€
Here is the full citation of tomorrow’s paper:
Karafet, T.M., Mendez, F.L., Meilerman, M.B., Underhill, P.A., Zegura, S.L., and Hammer, M.F. New binary polymorphisms reshape and increase resolution of the human Y-chromosomal haplogroup tree. Genome Res. doi:10.1101/gr.7172008.