Mar 23, 2017 - 03:19 AM
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Working Draft ChrY Trees for the haplogroups E, G, I and Q Posted by : thomas
During my recent review of new and existing SNP markers in the haplogroups E, G, I and Q I've continuously drawn working drafts which help me to understand and discover discrepancies that still need to get resolved. Over and over again I need to mention that the tree structure wasn't resolved or invented by myself. At best I try to improve and extend the major work of others and I try to collect all available information from the genetic genealogy community in a central place so that we are able to communicate the findings to the academic researchers.

The following draft tree graphics are heavily based on the YCC tree from Karafet et al. 2006 [1] and on the most current ISOGG tree 2009 [2].

Note that because I'm frequently updating the trees you may need to refresh the web page to see the latest version. Most browsers cache the graphics from the first visit. Click on the images to enlarge.
haplogroup E haplogroup G
haplogroup I haplogroup Q
Creative Commons License
Working Drafts of the Y Chromosome Tree for the haplogroups E, G, I and Q by Thomas Krahn is licensed under a Creative Commons Attribution-Noncommercial 3.0 Germany License.

Many thanks to all voluntary participants of the genealogical testing community for sharing their testing data from deCODEme and 23andMe chips and some of them providing control samples for my evaluation test runs. Special thanks also to Elise Friedman, Dr. Dirk Schweitzer, Dr. Ken Nordtvedt, Ted Kandell, Dr. Whit Athey, Victor Villarreal and Dr. David Wilson who identified the new SNPs as useful tests for DNA genealogy, pre-selected significant samples and helped me to refine the topology by cross checking all sources. This work wouldn't have been possible without the great spreadsheets from Ann Turner and Adriano Squecco who collected the SNP data from the volunteers that payed for their own DNA tests and made them available to the public.

[1] Karafet T M, Mendez F L, Meilerman M B, Underhill P A, Zegura S L, Hammer M F, (2008). New Binary Polymorphisms Reshape and Increase Resolution of the Human Y-Chromosomal Haplogroup Tree. Abstract. Genome Research, published online April 2, 2008

[2] International Society of Genetic Genealogy (2009). Y-DNA Haplogroup Tree 2009, Version: 4.04, Date: 15 January 2009,

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