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Major update reorganizes entire haplogroup I2 tree

Sunday, December 6, 2020

Z125 block split, new branches in Barclay group: 2020-12-05 tree for I-CTS11338

Click here to download our 2020-12-05 draft tree for I-CTS11338


A new Big Y-700 result is CTS12809+ and CTS8693+, but Z125- and negative for approximately 20 additional SNPs. All of these SNPs were formerly considered to be equivalent. 

Our tree shows CTS10530 as equivalent to Z125. The I-CTS12809 sample has a CTS10530- result and the I-CTS787* sample has only two reads at this position, both negative. The FTDNA tree shows CTS10530 as equivalent to CTS787, maybe FTDNA will correct this.

This update also shows new branches in the Barclay/Scottish cluster: a new I-FT409425 level and a new I-FT156865 branch.

Click here to find our previous tree for I-CTS11338
Click here for FTDNA's public haplotree for I-CTS11338
Click here for YFull's I-CTS11338 (I-Z105) tree
Click here for a brief description of the I-CTS11338 haplogroup

Saturday, November 14, 2020

2020-11-13 draft tree for I-Y4252

 Click here to download our 2020-11-13 tree for I-Y4252

A new Big Y-700 for a Swedish man resolved a block of four SNPs: A10035 and BY33208 occurred first, and A10034 and Y23458 are more recent. The wider I-A10033 haplogroup has an almost completely Scandinavian/continental European distribution with only one sample known from northeastern England.

This update shows some additional branches in other parts of the I-Y4252 tree, these are based on samples with English origin.



Click here to find our previous tree for I-Y4252
Click here for FTDNA's public haplotree for I-Y4252
Click here for YFull's I-Y4252 tree
Click here for a brief description of the I-Y4252 haplogroup

Tuesday, November 10, 2020

New 5000 year old branch below I-Y14718: 2020-11-10 tree for I-Y11222

Click here to download our 2020-11-10 draft tree for I-Y11222

This update shows a new branch called I-Y85303, it's below I-Y14718. It's only slightly younger than I-Y14718 as a whole, which has a MRCA date of 5200 years ago according to YFull's calculation. All known members of I-Y85303 have British origin, they belong to two very distantly related groups.

This update also shows:

  • a new branch called I-FT88076, it's specific to an English family.
  • a new level called I-Y54965, it's above I-PH3133. All of these families have origin from Northern Ireland and from the northern part of the Republic of Ireland
  • two new branches below I-Y14722, these are part of the M26-France cluster. Recently I have noticed an increase in Big Y samples from Europe, these people order Big Y-700 as their first test at FTDNA. They order from FTDNA's European affiliate (iGENEA) or directly from FTDNA.


Click here to find our previous tree for I-Y11222
Click here for FTDNA's public haplotree for I-Y11222
Click here for YFull's I-Y11222
Click here for a brief description of the I-Y11222 haplogroup

Thursday, November 5, 2020

A Yorkshire sample at the base of the Isles-C haplogroup: 2020-11-05 tree for I-Y3723

Click here to download our 2020-11-05 tree for I-Y3723

The Isles-C haplogroup is very characteristic of central-western Ireland. All members of this haplogroup share a large block of approximately 20 SNPs and they also share several distinctive STR marker values.

This update shows a new sample from Yorkshire, England: he is A544/Y5460+ and FGC14453/Y5456+, but he is Y5455/FGC14452- Y5450- and ancestral (negative) for approximately 17 additional SNPs

He also has some key marker values that are diagnostic for Isles-C: DYS572=11 or 12 (he has 11) and DYS444=10.

But he has some other marker values that aren't typical of Isles-C, for example he has DYS385=11-16, the 11 is typical of other branches of Isles I-Y3723, the other Isles-C men have a 12.

Wednesday, October 28, 2020

A new level in the Lindsay family haplotree: 2020-10-28 tree for I-FT11343

Click here to download our 2020-10-28 draft tree for I-FT11343 

I-FT11343 contains only men named Lindsay, Lindsay, Lindesay or men with different surnames who very likely had a Lindsay paternal ancestor several generations ago. There have been at least 43 Big Ys for I-FT11343.

This update shows two new branches below I-Y99301:

  • I-Y215390 which contains two samples. I expect that FTDNA will add this branch to their haplotree and Big Y Block Tree soon, but maybe they will choose a different SNP to name this branch.
  • I-BY47557 which contains at least 15 samples. Maybe FTDNA and YFull won't add the I-BY47557 level because it occurs in a region that is very similar to another Y chromosome. The two I-Y215390 samples have clear BY47557- results

Tuesday, October 27, 2020

A major new branch below I-S20602: 2020-10-26 tree for I-CTS10228

 Click here to download our 2020-10-26 draft tree for I-CTS10228


This update shows a new branch immediately below I-S20602. It's called I-FT80992 and it contains only two samples, one from Germany and one from Hungary.

There are five previously known branches below I-S20602: four large branches: I-S17250, I-Y4460, I-Z17855 and I-Y18331, and one small branch: I-FT76511. This update also shows a new branch below I-FT76511, it's called I-FT256359 and it contains samples from Serbia and from Bosnia and Herzegovina.

This update shows shows an additional new branch called I-BY161829, it's a downstream branch specific to a Greek family.