yDNA Haplogroup I: Subclade I1 (to view all results, set Page Size to 6400)- Background



I1 has a TMRCA estimated to be 4000 to 5000 years old (the now outdated "15,000 -20,000 years ago in Iberia" information was wrong), and confirmed by the single nucleotide polymorphism, SNP, known as M253. While many I1 members trace their ancestry to Scandinavia, others find their roots in the British Isles, Germany, Central Europe, Iberia, Russia and beyond.
What has happened to the I tree?
The publication of Underhill 2007and Karafet 2008 has brought major changes to the I tree. FamilyTreeDNA has a page explaining the changes here. The Genographic Project (Geno 2.0) is set to make the next leap forward and, as of 2013, has uncovered more than a dozen new SNPs in the I1 tree alone. 
How do I know I am I1? Because all men with the M253 y-chromosome SNP share a common ancestor all of their short tandem repeat markers, STRs, can be expected to be in a range around that of their forefather. It is then possible to predict the probability of someone's M253 status based on the frequency of their STR values among known I1s. Haplogroup predictions are done by the software at FTDNA and by Whit Athey's Haplogroup Predictor. (DYS455=8 is a very good predictor).  It is also possible to do the math by hand. This table shows the STR value distribution based on the 454 unique haplotypes from the first panel of markers. You may then look at your prediction by FTDNA, use the Whit's Predictor, and compare the frequencies of your marker results to other I1s. In most cases all of these methods will be in agreement and testing for M253 is unnecessary for both genealogical and anthropological information. If you still have doubts, you may wish to look at Borges' article 'Why SNP' to decide if a SNP test is right for you.
The most likely reason for an I1 to take a SNP test is to check for the  M253 subclade SNPs, DF29, CTS6364, L22, Z58, Z63, Z131. More often than not, it is better for an I1 to order SNP's a la carte, rather than ordering the outdated Deep Clade test. Big Y has been shown to be extremely useful in bringing the haplotree to light.  Before ordering SNP's, you might want to ask an administrator for advise.

Links and References Articles


  • Family Tree DNA's open source y-Chromosome Database: ySearch

  • The Sorenson Family of Companies non-profit Foundation's proprietary database: SMGF Database

E-mail Lists/Forums

Journals and News Letters

  • American Journal of Human Genetics

  • Annals of Human Genetics

  • European Journal of Human Genetics

  • FamilyTreeDNA Newsletter: Facts& Genes

  • FamilyTreeDNA Newsletter: Facts &Genes Archives

  • Genome Research

  • Human Genetics

  • Journalof Genetic Genealogy

  • Society for Molecular Biology


Websites about y–chromosome DNA

Websites about History

General Fund

Current balance: $353.00

Type Amount Date Donor Note KitNum Donation Type
Credit $100.00 7/21/2017 Tommie Marsters For the I-P109 group   Individual
Credit $30.00 6/24/2017 Maurice Möhlen     Unknown
Debit $39.00 4/26/2017     448007 Unknown
Debit $375.00 12/28/2015 Paul Stone Per admin request B66140 Unknown
Credit $125.00 12/23/2015 Phil Hobrla For balance on Big Y for kit #B66140   Unknown
Debit $24.00 2/16/2015       Unknown
Credit $20.00 12/10/2014 Richard Reed BY63 for kit #6708   Individual
Credit $20.00 12/9/2014 Craig K. Gowens SNP BY63 for kit #6708   Individual
Debit $425.00 12/7/2014       Unknown
Credit $260.00 12/4/2014 AK Big Y for Sakaliev, kit #343564   Individual
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Project Stats

Statistic Type Count
Big Y 1308
Combined GEDCOMs Uploaded 964
DISTINCT mtDNA Haplogroups 895
DISTINCT Y-DNA Confirmed Haplogroups 917
DISTINCT Y-DNA Predicted Haplogroups 0
Family Finder 3464
Genographic 2.0 Transfers 281
Maternal Ancestor Information 4467
mtDNA 2748
mtDNA Full Sequence 1792
mtDNA Plus 2449
mtDNA Subgroups 0
Paternal Ancestor Information 6509
Predicted Y-DNA Haplogroups 2374
Total Members 7378
Unpredicted Y-DNA Haplogroups 0
Unreturned Kits 77
WTY 49
Y-DNA Deep Clade (After 2008) 662
Y-DNA Deep Clade (Prior to 2008) 570
Y-DNA Subgroups 571
Y-DNA111 2051
Y-DNA12 7291
Y-DNA25 6621
Y-DNA37 6391
Y-DNA67 4493