This I-L38 – FigUre tree is also available as PDF for download: I-L38 – FigUre tree.pdf
f you wanted to compare the Y-DNA of two men, you used Y-STR tests with as many markers as possible. If one or more NGS (Next Generation Sequencing) are available, a new method can be used to determine the relationship of two men in a purely paternal line using “young” SNPs. Your youngest SNPs are those that have only been detected in your sample. These are called “Novel SNPs” or “Private SNPs”.
This method is made possible by the company YSEQ.net and the possibility to actually test any SNP that can be tested with the Sanger method for little money after you “wish” for it.
The diagram shows the subgroup I-BY14026, the Y-haplogroup I-L38.
This was originally created to get an overview of the SNPs which, are used for the age estimation of YFull.com on the one hand and can be ordered at YSEQ.net on the other hand. The tables contain the name for each SNP, the HG38 position with value (ancestral and derived), and the information if these are used for the Y-haplotrees of FTDNA and YFull.
In the autosomal DNA tests of 23andme and Living DNA, the Y-haplogroup and the mt-haplogroup are displayed directly. Many don’t know that the raw data, of all male atDNA testers contain information (Y-SNPs) for the Y-haplogroup and can be extracted with tools like the Morley Predictor. (Only FTDNA removes these Y-SNPs from the raw data).
Irrespective of which company the atDNA test was done with, it makes sense to have a closer look at the results, because there is much more information in it than some people think. If you get an “old” haplogroup displayed, even though younger branches are tested, it can mean that you are sitting on a rare branch.
Since my first Y-DNA test I have been fascinated by the Y trees. That’s why I support these projects and have already contributed some NGS. In the beginning I couldn’t imagine much of it. What, when, where and why happens this and that? In the meantime, I can answer some questions. Here is a small overview of what happens when you participate in a Y-tree.
But there are also a few more ways to support haplogroup projects. By donating, even if it is “only” the raw data of the existing test.
When it comes to verifying paternal relationships over several generations, the Y-DNA test is the right choice. My own concern is to verify a family legend that says that my fatherly ancestor came from a certain area of Greece about three hundred years ago. Here you can’t get any further with atDNA. The selection of tests for Y-DNA is extensive. Depending on the motivation for such a test, there are different approaches.