The first phylogenetic chart to unify nomenclature was published in 2002 by the Y Chromosome Consortium (YCC). The 2003 Y-DNA phylogenetic chart appeared in Mark A. Jobling and Chris Tyler-Smith, The Human Y Chromosome: An Evolutionary Marker Comes of Age Nature Reviews|Genetics, Figure 5. In 2005 Family Tree DNA created the 2005 Y-Chromosome Phylogenetic Tree. An ISOGG group was formed in November 2005 to create a web-based document using Richard Kenyon's style of an indented list which could be updated to keep pace with the rapid developments in the field.
      Current ISOGG members who work with the tree are: Coordinator: Alice Fairhurst. Design team: Sue Barry, Tanmoy Bhattacharya, Michael Hebert, Tom Hutchison, Richard Kenyon, Doug McDonald. Content experts: Abdulaziz Ali, Whit Athey, Ray H. Banks, Katherine Hope Borges, Aaron R. Brown, David Dowell, Phil Goff, Gareth Henson, Tim Janzen, Bob May, Eugene Matyushonok, Lawrence Mayka, Charles Moore, Ana Oquendo Pabon, Marja Pirttivaara, David Reynolds, Bonnie Schrack, Vince Tilroe, Aaron Salles Torres, Steve Trangsrud, Ann Turner, Vladimir Volkov. Content experts liaison with experts from various DNA labs to determine what information is needed to amend the tree.
      The Y Haplogroup classification of the male Y-chromosome is currently used to estimate the population group of the paternal line. The haplogroups are identified by the letters, A through T. Haplogroups are subdivided into one or more levels, called subclades, and thus forming a tree. The Y-chromosome haplogroup is determined by performing a sequence of SNP tests.
      Each line lists a haplogroup or subclade in boldface, then one or more SNPs follow on the same line. For a sample to belong to a particular subclade, it must test positive for any one of the SNPs appearing on the line, providing positive results were obtained for its haplogroup and any intervening subclades.
      SNPs development indicated by beginning letters:
AF = Fernando Mendez, Ph.D., University of Arizona, Tucson, Arizona
CTS = Chris Tyler-Smith, Ph.D., The Wellcome Trust Sanger Institute, Hinxton, England
DF = anonymous researcher using publicly available full-genome-sequence data, including 1000 Genomes Project data; named in honor of the DNA-Forums.org genetic genealogy community
F = Li Jin, Ph.D., Fudan University, Shanghai, China
FGC = Full Genomes Corp. of Virginia and Maryland
G = Ver�nica Gomes, IPATIMUP Instituto de Patologia e Imunologia Molecular da Universidade do Porto (Institute of Molecular Pathology and Immunology of the University of Porto)
IMS-JST = Institute of Medical Science-Japan Science and Technology Agency
KHS = Functional Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology
KL = Key Laboratory of Contemporary Anthropology, School of Life Sciences and Institutes of Biomedical Sciences, Fudan University, Shanghai, China
L = Thomas Krahn, MSc (Dipl.-Ing.) of Family Tree DNA's Genomics Research Center; snps named in honor of the late Leo Little
M = Peter Underhill, Ph.D. of Stanford University
N = The Laboratory of Bioinformatics, Institute of Biophysics, Chinese Academy of Sciences, Beijing
NWT = Northwest Territory, Theodore G. Schurr, Ph.D., Laboratory of Molecular Anthropology, University of Pennsylvania, Philadelphia, PA
P = Michael Hammer, Ph.D. of University of Arizona
Page, PAGES or PS = David C. Page, Whitehead Institute for Biomedical Research
PF = Paolo Francalacci, Ph.D., Universit� di Sassari, Sassari, Italy
PK = Biomedical and Genetic Engineering Laboratories, Islamabad, Pakistan
PR = Primate (gorilla and chimpanzee), Thomas Krahn's WTTY
S = James F. Wilson, D.Phil. at Edinburgh University
SA = South America, Theodore G. Schurr, Ph.D., Laboratory of Molecular Anthropology, University of Pennsylvania, Philadelphia, PA
TSC = Gudmundur A. Thorisson and Lincoln D. Stein, The SNP Consortium, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY
U = Lynn M. Sims, University of Central Florida; Dennis Garvey, Ph.D. Gonzaga University; and Jack Ballantyne, Ph.D., University of Central Florida
V = Rosaria Scozzari and Fulvio Cruciani, Dipartimento di Biologia e Biotecnologie �Charles Darwin� , Sapienza Universit� di Roma, Rome, Italy.
VL = Vladimir Volkov, Tomsk University, Russia
Y = Y Full Team using data from the 1000 Genomes Project
YSC = Thomas Krahn, MSc (Dipl.-Ing.) of Family Tree DNA's Genomics Research Center
Z = Gregory Magoon, Ph.D., Richard Rocca, Vince Tilroe, David F. Reynolds, Bonnie Schrack, Peter M. Op den Velde Boots, Ray H. Banks, Roman Sychev, Victar Mas, Steve Fix, Christian Rottensteiner, and an anonymous individual, independent researchers of publicly available whole genome sequence datasets, and Thomas Krahn, MSc (Dipl.-Ing.), with support from the genetic genealogy community.

Corrections/Additions made since 1 January 2013:

• Added SNP development identification for AF, CTS, PF, and PR on 4 January 2013.
• Added SNP development identification for F, YSC and changed definition for Z on 5 January 2013.
• Added David Dowell to content expert list on 10 March 2013.
• Revised designation for V snps on 22 March 2013.
• Added SNP development for NWT, SA on 8 April 2013.
• Added Vladimir Volkov and removed David Wilson as content expert on 23 April 2013.
• Added SNP development identification for Y on 15 May 2013.
• Added Sue Barry and Michael Hebert to design team on 29 November 2013.
• Added SNP development identification for FGC; updated SNP development identification for Z on 10 December 2013.

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Please cite this document as follows: International Society of Genetic Genealogy (2013). Y-DNA Haplogroup Tree 2013, Version: [Number given at top of Main Page], Date: [Date given at top of Main Page], http://www.isogg.org/tree/ [Date of access: Day, Month, Year].