PSHG Haplotype and Genetic Distance

A new page is launched under our Results > Technical Data section – PSHG Haplotype Technical Data.

In the last post we talked about the Y-SNP Haplotree and how we organize clades by branching SNPs.  Today we return to the other method of analyzing Y-DNA, Y-STRs.  Refer to the following blog posts if you need a refresher on the concepts of Y-STRs and Genetic Distance: Mutating DNAPartner Profiles – FTDNA.

The International Society of Genetic Genealogists defines a Y-DNA Haplotype as, “the marker (allele) values obtained from a Y-STR (short tandem repeart) test.  The result for each marker is expressed as a number.”

Let’s look at the first few markers and values of the PSHG Modal Haplotype:

PSHG Haplotype Y7

  • DYS398, DYS390, DYS19, DYS391, DYS385a, DYS385b, and DYS426 across the top row represent the FTDNA names of the Y-STR markers.  Specifically this refers to the named location on the Y Chromosome where a short tandem repeat is identified.
  • The names above, in their order, can be referred to by marker number: 1 – 7 is shown below, but latest Y-STR tests analyze 111 markers.
  • The values of the test result are in the third row.  This number value represents the number of STRs which are found at that marker – your DNA signature.

Example: At Marker #1, named DYS393 by FTDNA, the PSHG Modal Haplotype has a value of 13.

Each person with Y-STR results has their own haplotype.  Patterns emerge when comparing groups of related Y-STR111 test results, even if those group members are related at 8th cousins!  While individual values may differ, if there are enough member test results, a Modal Haplotypes can be established.

Genetic Distance is a way to measure and compare how closely (or far) one haplotype is to another.  Our Haplotype Technical Data page shows a comparison of the PSHG Modal Haplotype compared to those at R1b-FGC13595 and further upstream at R1b-U106.

Visit the PSHG Haplotype Technical Data page to see this detail and to understand how the Genetic Distance compares to other upstream haplotypes.

References:

  1. ISOGG Wiki definition of Haplotype, https://isogg.org/wiki/Haplotype
  2. FTDNA Learning Center, https://www.familytreedna.com/learn/user-guide/y-dna-myftdna/y-str-results-page/

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