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Major update reorganizes entire haplogroup I2 tree

Thursday, February 6, 2020

Another German in the Sardinian I-PF4190 branch: 2020-02-06 tree for I-CTS11338

Click here to download our 2020-02-06 tree for I-CTS11338

I-PF4190 is the largest branch of I-M26 on the island of Sardinia, approximately 75% of the I-M26 men in Sardinia belong to I-PF4190. Paolo Francalacci sequenced the Y chromosomes of 1200 Sardinia men, 464 of them belonged to I-M26 and 345 of these belonged to I-PF4190.

Francalacci was able to create a tree based on these sequences, his I-PF4190 tree had approximately 147 branches and hundreds or low thousands of SNPs.

This I-CTS11338 tree is based on commercial NGS Y chromosome sequences (the Big Y etc). Our shows only 5 branches in I-PF4190 and approximately 50 SNPs. I-PF4190 has a MRCA who lived approximately 4100 years ago. I  think this shows how much is remaining to be discovered about the Y-DNA tree.

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This tree shows a new sample for a German ancestry men. When we see non-Sardinian men in I-PF4190, they often have German ancestry. He's not closely related to previous I-PF4190 German samples

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For reasons of space we have moved the I-Z113 branch to a tree of its own, click here to find our first I-Z113 tree.

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Click here to find our previous tree for I-CTS11338
Click here for a brief description of the I-CTS11338 haplogroup

2 comments:

  1. Is there any clear theory as to where this haplogroups main group emerged? Is it native to Sardinia or could it have started in Europe before expansion? Thank u

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  2. Francalacci thought that I-PF4190 had its expansion in Sardinia (it's his I2a1a-δ clade) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5500864/

    I agree, I-PF4190 had a very rapid expansion as shown by Francalacci's tree. We see very few I-PF4190 outside of Sardinia, and when we find non-Sardinians who belong to I-PF4190, they belong to downstream branches as shown on our I-CTS11338 tree.

    I don't have an opinion about when the I-PF4190 founder arrived in Sardinia. I-M26 as a whole surely emerged somewhere else, not in Sardinia. Francalacci found some other clades of I-M26 that also have a long history of Sardinia, and he found some other I-M26 men that are likely descendants of men who arrived in the last 2000 years.

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