This tree shows a new branch called I-Z27398. The known members belong to three subbranches:
--11 Sardinian samples from Paolo Francalacci's study
--a small number of men with western German and English ancestry
--a Canadian man who was adopted and whose paternal ancestry is unknown.
None of these three groups are closely related to each other. The common ancestor of this I-Z27398 group lived approximately 5000 years ago, according to YFull's calculations.
The 11 samples from the Francalacci study were the only I-Y11222 samples found in Sardinia. There were approximately 450 samples who belonged to other branches of I-M26, most of these were in the I-PF4190 branch (part of I-L160). According to Francalacci, there were four private Sardinian clades of I-M26, the Y11222+ Z27398+ samples are his β clade, and the PF4190+ samples are his δ clade.
One of the I-Y11222 samples is shown on the YFull tree as id:ERS256272. The current YFull tree (v6.02) shows an I-Z27396 branch which is equivalent to I-PF6947, and which contains both Z27398+ and Z27398- samples. Eventually YFull will add a more specific I-Z27398 branch.
https://www.yfull.com/tree/I-P37/
Probably the I-Z27398 men came to Sardinia thousands of years ago. It's very interesting that their closest relatives, according to present knowledge, are the other I-Z27398 men from Germany and England, and then the Z27396+ (PF6947+) Z27398- men from Ireland and England.
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This tree also shows a new branch defined by the 14444671 T to C variant, and 17 additional variants. The two Big Y results for this branch have ancestry from Central America, likely from Spain originally. They are in the I-A20936 branch with the Puerto Rican sample id:HG01167PRI from the 1000 Genomes Project.
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There is one additional Big Y in progress for a likely I-Y11222 man. He has French Canadian ancestry and he's not closely related to any other Big Y result,
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