yDNA Haplogroup I: Subclade I1 (to view all results, set Page Size to 4300)- Background



I1 is estimated to be 4000 to 5000 years old (the now outdated "15,000 -20,000 years ago in Iberia" information was wrong), and confirmed by the single nucleotide polymorphism, SNP, known as M253.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, 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, M227, P109, 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 More often than not, it is better for an I1 to order SNP's a la carte, rather than ordering the outdated Deep Clade test. Before ordering SNP's, you might want to ask an administer 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: $1,160.00

Type Amount Date Donor Note KitNum Donation Type
Credit $25.00 2/23/2014 steutel foor Big Y test m253*   Individual
Debit $695.00 2/21/2014     123861 Unknown
Credit $200.00 2/13/2014 Carl L Sheffield III For Kit #123861 BIG-Y   Honor
Credit $100.00 2/12/2014 Rick Wickwire For SHEFFIELD #123861   Individual
Credit $200.00 2/11/2014 Peterson For use toward a Big Y for an I-M253*   Unknown
Credit $25.00 2/11/2014 Chris Myers BigY test for SHEFFIELD (#123861):   Individual
Credit $50.00 2/11/2014 Diana Gale Matthiesen BigY test for SHEFFIELD, Kit #123816.   Individual
Credit $51.00 2/9/2014 E.A.M. Please apply towards Big Y for Sheffield f123861 I1-M253*   Anonymous
Credit $20.00 2/9/2014 John M Rhodes To BigY test for Sheffield Project - Diana   Unknown
Credit $100.00 1/24/2014 Connie Graham For the Big Y   Individual
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Project Stats

Statistic Type Count
Big Y 157
Combined GEDCOMs Uploaded 786
DISTINCT mtDNA Haplogroups 489
DISTINCT Y-DNA Confirmed Haplogroups 15
DISTINCT Y-DNA Predicted Haplogroups 3
Family Finder 1242
Genographic 2.0 Transfers 189
Maternal Ancestor Information 2474
mtDNA 1614
mtDNA Full Sequence 768
mtDNA Plus 1308
mtDNA Subgroups 0
Paternal Ancestor Information 4004
Predicted Y-DNA Haplogroups 2502
Total Members 4619
Unpredicted Y-DNA Haplogroups 123
Unreturned Kits 15
WTY 50
Y-DNA Deep Clade (After 2008) 635
Y-DNA Deep Clade (Prior to 2008) 566
Y-DNA Subgroups 128
Y-DNA111 743
Y-DNA12 4591
Y-DNA25 3971
Y-DNA37 3763
Y-DNA67 2548