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Y Chromosome Consortium

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The Y Chromosome Consortium (YCC) was a scholarship group involved in a collaborative effort to study genetic variation on the non-recombinant region of the human Y-chromosome. The YCC web site provided information on the YCC Repository, NRY polymorphisms and changes in nomenclature. The nomenclature system published in 2002 and updated in 2008 is widely used in papers on Y chromosome variation. The YCC is no longer active.

The ISOGG web-based Y-DNA Haplogroup Tree is based on the YCC nomenclature.

Y Chromosome Consortium (YCC)
Type Consortium
Industry Biotechnology
Founded before 1994
Headquarters The University of Arizona, United States
Key people Michael Hammer, Peter Underhill, Peter Forster, Tatiana Karafet, Mark Jobling, Chris Tyler-Smith et al.
Products Academic publishing, papers
Services genetic variation on the human Y chromosome, nomenclature


  • Jan. 1994: Michael Hammer (University of Arizona) and Nathan Ellis (New York Blood Center) published the first Y Chromosome Consortium Newsletter [1]
  • Feb. 2002: The Y Chromosome Consortium published their first paper A Nomenclature System for the Tree of Human Y-Chromosomal Binary Haplogroups and introduced the modern haplogroup nomenclature of Y-DNA.[2] The YCC Nomenclature Committee was at that time comprised of the following individuals: Peter Forster (McDonald Institute for Archaeological Research), Michael Hammer (University of Arizona), Matthew E. Hurles (McDonald Institute for Archaeological Research), Mark A. Jobling (University of Leicester), Peter de Knijff (Leiden University), Chris Tyler-Smith (University of Oxford), and Peter Underhill (Stanford University).[2] An overview of other nomenclature systems of the time was also provided.[3]
  • April 2008: Karafet, Hammer, Underhill, et al. published New Binary Polymorphisms Reshape and Increase Resolution of the Human Y Chromosomal Haplogroup Tree with substantial refining and updates.[4]

Further reading