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Rare DYS Values?

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  • Rare DYS Values?

    I just got the results back from my 12-25 DYS upgrade. Pretty fast! Compliments to the FtDNA team.

    Interestingly, my values appear rather untypical. Whilst I match 7 individuals at a 12/12 level, according to FtDNA, I match absolutely no one at the 25 marker level. I am wondering if anyone could tell me if there is anything unusual with my DYS values which would account for this.

    My Ysearch ID is CHXUV. I would appreciate any help that anyone could provide.

  • #2
    You might want to visit SMGF at http://www.smgf.org/ychromosome/marker_details.jspx . They have a list of the markers they test. By clicking on the marker name it will bring up a chart showing the percents for each value for that marker.

    R1b1 is a very common Haplogroup.

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    • #3
      On Ysearch, if you select "match on at least 8 markers, allowing a genetic distance of 1 per marker matched above 8", you have some matches at a genetic distance of 3 and 4, and plenty at 5,6,7 ... all using 25 markers.
      Last edited by gtc; 14 October 2009, 09:49 AM.

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      • #4
        Originally posted by gtc View Post
        On Ysearch, if you select "match on at least 8 markers, allowing a genetic distance of 1 per marker matched above 8", you have some matches at a genetic distance of 3 and 4, and plenty at 5,6,7 ... all using 25 markers.
        I think I should have been a bit more clear on my point. I meant that I match no one at a genetic distance of 0-1 at the 25 marker level. Your information leads me to an interesting question though.

        What is the relevance of matching people with distances of 3-6 at the 25 marker level?

        I looked into the frequency of my mutations and found two particular figures of interest. The frequency of my DYS value of 385a=10 is only 3% and my value of 464b=17 is only 1%. I have two or three other mutations with frequencies under 20%.

        Being that R1b is such a popular haplogroup I was expect to match far more people, at least at such broad levels as 12-25. So I am just wondering if this is typical.

        Thank you for the time you took to look into the question.

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        • #5
          Originally posted by Asturianu View Post
          What is the relevance of matching people with distances of 3-6 at the 25 marker level?
          Here is FTDNA's explanation:

          http://www.familytreedna.com/genetic...px?testtype=25

          Being that R1b is such a popular haplogroup I was expect to match far more people, at least at such broad levels as 12-25. So I am just wondering if this is typical.
          We're told that R1b is the most frequently occurring Y-DNA haplogroup in Western Europe. However, the various database sample sets of R1b are probably skewed by over-representation of certain regions in Western Europe and consequently under-representation of other regions, so your markers may be typical of a region where DNA testing is not currently popular.

          Also, when looking at haplotype records, always bear in mind that the area of origin stated against the various haplotype records could be sheer guesses in the majority of cases, based on family rumors, etc.

          The usual advice when it comes to this stuff is to join one of the project groups, especially a surname project if one exists for yours. Also, if you proceed to deep clade testing to further qualify your R1b subclades, then you may be eligible to join one of the R1b special interest project groups, and my experience is that the leaders of those projects are right up with the latest science of SNPs and will advise you on how to proceed with further testing, etc.

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