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Thread: Phylo-equivalency?

  1. #1
    Junior Member
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    23-01-13
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    Y-DNA haplogroup
    I-Z138*
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    H6a1b3a

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    American (From the British Isles & Germany)
    Country: United States



    Phylo-equivalency?

    How is this determined?

  2. #2
    Great Adventurer sparkey's Avatar
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    I2c1 PF3892+ (Swiss)
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    U4a (Cornish)

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    3/4 Colonial American, 1/8 Cornish, 1/8 Welsh
    Country: USA - California



    Quote Originally Posted by VMax View Post
    How is this determined?
    By testing targeted individuals in a clade. Basically, if you know the structure of a haplogroup tree beforehand, and you find an SNP in an individual sample, you work backwards along the tree (or forwards, or whatever way is most efficient) until you reach a node where all the individuals downstream of that node test positive for the SNP, and all those upstream test negative. If another SNP is already at that location, then the existing SNP is phyloequivalent to the SNP you've found.

  3. #3
    Junior Member
    Join Date
    23-01-13
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    California
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    Y-DNA haplogroup
    I-Z138*
    MtDNA haplogroup
    H6a1b3a

    Ethnic group
    American (From the British Isles & Germany)
    Country: United States



    Quote Originally Posted by sparkey View Post
    By testing targeted individuals in a clade. Basically, if you know the structure of a haplogroup tree beforehand, and you find an SNP in an individual sample, you work backwards along the tree (or forwards, or whatever way is most efficient) until you reach a node where all the individuals downstream of that node test positive for the SNP, and all those upstream test negative. If another SNP is already at that location, then the existing SNP is phyloequivalent to the SNP you've found.
    AH! Thanks Sparky!

    A bit more simplisitic than I thought.

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