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Thread: What do fst distances show?

  1. #1
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    What do fst distances show?

    I'm new to this, what does fst distances show compared to oracle calculators etc? Thanks.

    I'll be really grateful if someone could explain this to me because it's got me confused

  2. #2
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    WRT to Oracle admix calculators the lower the number the better. The tell you best fits.
    dp :-)
    Grace and good eure and long prosperitee. [Lydg. Mum. Goldsmiths]

    ysearch/mitosearch id: atr94 GENBANK/ENA mtDNA id: KF703542 member ISOGG

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  4. #3
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    Fst is fixation index, a measure of distance to populations. As David said, the closer you are to zero, the less the distance.
     

    Other ancestral Y lines:

    E1b-M81 Ukraine (Ashkenazi)
    E1b-V13 England
    I1-M253 Ireland
    I2-M423 Ukraine
    R1a-L176.1 Scotland
    R1b-L584 Syria/Turkey (Sephardi)
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    R1b-L21 (1)England; (2)Wales?>Connecticut
    R1b-L48 England
    R1b-P312 Scotland
    R1b-FGC32576 Ireland

    Other ancestral mtDNA lines:

    H1b2a Ukraine (Ashkenazi)
    H6a1a3 Ukraine
    K1a9 Belarus (Ashkenazi)
    K1c2 Ireland
    V7a Ukraine

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    Quote Originally Posted by AJL View Post
    Fst is fixation index, a measure of distance to populations. As David said, the closer you are to zero, the less the distance.
    Great, however whats more accurate in terms of knowing who your closest population is to you? Fst distances or oracle? What do oracle show?

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    Quote Originally Posted by David Powell View Post
    WRT to Oracle admix calculators the lower the number the better. The tell you best fits.
    dp :-)
    What do oracle shows?

  8. #6
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    It's not an exact science and results will vary in accuracy for individuals but that does not always mean any one system is inherently better than another. The best bet is to look at results from multiple tests and see what signals are repeated.
     

    Other ancestral Y lines:

    E1b-M81 Ukraine (Ashkenazi)
    E1b-V13 England
    I1-M253 Ireland
    I2-M423 Ukraine
    R1a-L176.1 Scotland
    R1b-L584 Syria/Turkey (Sephardi)
    R1b-L20 Ireland
    R1b-L21 (1)England; (2)Wales?>Connecticut
    R1b-L48 England
    R1b-P312 Scotland
    R1b-FGC32576 Ireland

    Other ancestral mtDNA lines:

    H1b2a Ukraine (Ashkenazi)
    H6a1a3 Ukraine
    K1a9 Belarus (Ashkenazi)
    K1c2 Ireland
    V7a Ukraine

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  10. #7
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    at what number does the population distance lose it relevance?

  11. #8
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    If i have a repeated population at 30.00-25.00 distance does that make it very far away? and what percentage would that ethnicity amount up to?

  12. #9
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    25+ is not significant. That sounds like an Oracle1 value (and one for a very admixed individual)
    Use Oracle4 to get a population mix with lower Fst.
    d[ :-)
    Grace and good eure and long prosperitee. [Lydg. Mum. Goldsmiths]

    ysearch/mitosearch id: atr94 GENBANK/ENA mtDNA id: KF703542 member ISOGG

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  14. #10
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    To expand on dp's excellent answer, 1.00 would be a perfect match on single mode. Most people of a single ethnic origin, from a non-diverse population that is well represented in data sets, will end up below 4.00 on single mode. 25.00 is a horrible match, and while you might by chance have a percentage of your ancestry from that or a similar population, it's not a good representation of your ancestry overall.
     

    Other ancestral Y lines:

    E1b-M81 Ukraine (Ashkenazi)
    E1b-V13 England
    I1-M253 Ireland
    I2-M423 Ukraine
    R1a-L176.1 Scotland
    R1b-L584 Syria/Turkey (Sephardi)
    R1b-L20 Ireland
    R1b-L21 (1)England; (2)Wales?>Connecticut
    R1b-L48 England
    R1b-P312 Scotland
    R1b-FGC32576 Ireland

    Other ancestral mtDNA lines:

    H1b2a Ukraine (Ashkenazi)
    H6a1a3 Ukraine
    K1a9 Belarus (Ashkenazi)
    K1c2 Ireland
    V7a Ukraine

  15. The Following 2 Users Say Thank You to AJL For This Useful Post:

     dp (01-12-2017),  Táltos (01-12-2017)

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