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What is Haplogroup P(xR1a1) and R1a vs. R1a1

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  • What is Haplogroup P(xR1a1) and R1a vs. R1a1

    I see in this paper:
    http://www.ftdna.com/pdf/400971.pdf

    3 types of "R" haplogroups, P(xR1a), R1a Undifferentiated -very rare, and R1a1.

    First, does anyone know exactly what "P" (xR1a) is? Base on the article it was what is labled R1a in the article tables that @ 10% of all Leviim (Ashkenaz and Sephardic).

    See table 1.

    Is P(xR1a) its own haplogroup?, Or just a way to Distinguish Between R1a and R1a undiferentiated. (supposed to be rare)
    Also any info on R1a Vs. R1a1 would be appreciated.

    map of haplogroups:
    http://ycc.biosci.arizona.edu/nomenc...stem/fig1.html

  • #2
    haplotree

    Izzy,
    A better/easier to read haplotree is at; www.familytreedna.com/haplotree.html. P is the marker/mutation which ocurred prior to the mutation which is now labelled R haplogroup. I believe that in the ( ) means that it does not include that. For example all in the R haplogroup (identified by M207 marker) also have the marker (M45) that shows they descend from P as well. A little confusing be the haplotree should help.
    Don Potter

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    • #3
      Re: What is Haplogroup P(xR1a1) and R1a vs. R1a1

      Originally posted by IZZY
      I see in this paper:
      http://www.ftdna.com/pdf/400971.pdf

      3 types of "R" haplogroups, P(xR1a), R1a Undifferentiated -very rare, and R1a1.

      First, does anyone know exactly what "P" (xR1a) is? Base on the article it was what is labled R1a in the article tables that @ 10% of all Leviim (Ashkenaz and Sephardic).

      See table 1.

      Is P(xR1a) its own haplogroup?, Or just a way to Distinguish Between R1a and R1a undiferentiated. (supposed to be rare)
      Also any info on R1a Vs. R1a1 would be appreciated.

      map of haplogroups:
      http://ycc.biosci.arizona.edu/nomenc...stem/fig1.html
      Izzy, I think P(xR1a) means "P except R1a." P is a sort of super haplogroup which includes all Q and R haplogroups. The major component would be R1b, the largest haplogroup in Europe. Notice that Germany in the chart is almost 47% P(xR1a). Actually, I believe the reference reads P*(xR1a); I don't understand why there's an asterisk.

      Bill H.

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      • #4
        Re: What is Haplogroup P(xR1a1) and R1a vs. R1a1

        Izzy,
        Bill Hurst is quite right.

        Bill, The asterix is used for undifferentiated haplotypes (since they are what are called paratypes).

        Its all explained in the following paper:

        http://www.familytreedna.com/pdf/YCC%2020021.pdf

        This is the paper where they described the current haplotype naming system. They explain in the paper things like using P(xR1a1) to mean "all in haplogroup P except R1a1".

        This paper and the "Y chromosome comes of age" paper are the two most useful papers in understanding all the Y-chromosome distribution data (at least, thats what I have found).

        Angela.

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        • #5
          Don , Bill, Angela,

          Thank you for helping me clear some of that up.

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