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how to convert from other companies markers

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  • how to convert from other companies markers

    Hi,

    Just back from the conference and I realized I may have missed something...

    I have several guys who tested with other companies. Is there a resource out there that tells me what needs to be added to the results to make them comparable to FTDNA results.

    I have testees fom Relative Genetics, and Genebase.

    Thanks,

  • #2
    FTDNA doesn't provide a full conversion list. There's some info at Ysearch, but it's not fully updated.

    Most people use the SMGF conversion chart:

    http://www.smgf.org/ychromosome/marker_standards.jspx

    Since this is from SMGF's perspective, you'll need to do a little manipulation to convert from another lab to FTDNA. Convert from the source lab to SMGF first, then convert from SMGF to FTDNA.

    Another option is SMGF's search form:

    http://www.smgf.org/ychromosome/search.jspx
    (you'll need to sign up for a free account and log in)

    If you select the lab the person tested with, enter their results, and then change the lab to FTDNA, it'll convert the values for you.

    Elise

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    • #3
      Thanks, I will look those resources up.

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      • #4
        Originally posted by efgen View Post
        FTDNA doesn't provide a full conversion list. There's some info at Ysearch, but it's not fully updated.

        Most people use the SMGF conversion chart:

        http://www.smgf.org/ychromosome/marker_standards.jspx

        Since this is from SMGF's perspective, you'll need to do a little manipulation to convert from another lab to FTDNA. Convert from the source lab to SMGF first, then convert from SMGF to FTDNA.

        Another option is SMGF's search form:

        http://www.smgf.org/ychromosome/search.jspx
        (you'll need to sign up for a free account and log in)

        If you select the lab the person tested with, enter their results, and then change the lab to FTDNA, it'll convert the values for you.

        Elise
        Interesting. I have gone to second option you gave. I selected Relative Genetics. DYS 442 gives a range of 7-16 to select for Relative Genetics. My guy's result is 17. Same for DYS 452, gives a range of 5-16 and my guy's result is 29.

        Don't quite know what to do with that. Am I doing something wrong?

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        • #5
          Originally posted by Dawn Ellis View Post
          Interesting. I have gone to second option you gave. I selected Relative Genetics. DYS 442 gives a range of 7-16 to select for Relative Genetics. My guy's result is 17. Same for DYS 452, gives a range of 5-16 and my guy's result is 29.

          Don't quite know what to do with that. Am I doing something wrong?
          Hrm. Well, RG was rolled into Ancestry.com, so I'm assuming those results are from before then. RG may have changed their own reporting convention a few times over the years and I'm not sure which one SMGF is using for them -- do you know if those results were the last set from RG? And do you know if this guy had his results rolled into Ancestry? If so, he should check and see what Ancestry reports for his results now.

          This is the difficulty with trying to compare results between companies

          Elise

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          • #6
            I will email and ask him. Thanks Darren

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            • #7
              Genebase and FTDNA

              I have a new potential participant who has a cousin that has tested at genebase. I have the genebase results, and am seeing some strange #s here.

              From looking at the genebase conversion pages:
              http://www.genebase.com/resource/item.php?rsId=25

              and also what is on various pages including YSearch....I am very confused how to convert values for FTDNA comparison.

              Specifically, markers 454 and 458. Some information online suggests that I should add 1 and 2 respectively to the genebase results to make a comparison. I've also added 5 to 442 to make the comparison.

              If anyone has a solid handle on present methods to compare with genebase, please advise.

              And is there a current "rock-solid" sheet that shows present comparisons between all major testing companies?

              Thanks
              Gary Lee
              Admin - Lee Surname Project

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