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Thread: GEDmatch current matches

  1. #1
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    GEDmatch current matches

    As anyone noticed a dip in the number of matches at a certain MRCA distance? and then a subsequent increase. I had assumed the number of matches should progressively increase as we look at matches with more distant MRCA.
    Technique: Copy/Patse your GEDmatch match index to Excel and select on the lines for each gen (the count will be on the left in a little box). Then make an Excel chart of your results. One of those I chose was about 50th , the other one about 500th.
    dp :-)
    viz:
    Grace and good eure and long prosperitee. [Lydg. Mum. Goldsmiths]

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

  2. #2
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    This is the result for my 14 persons:
    Y-DNA: R-Y14088 (ISOGG: R1b1a1a2a1a2b1c2b1a1a)
    mtDNA: J1c1i (J1c1 + 7735G and 8848C) Extras: 198T 12007A 16422C 16431A

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     dp (11-17-2014)

  4. #3
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    Quote Originally Posted by Petr View Post
    This is the result for my 14 persons:
     
    looks like 4.9-5.3 generations is a breakpoint in something for some reason.
    Any ideas?
    dp :-)
    Your HK match has its maximum matches/gen a full generation sooner (more recent) than the other 12 you ran, and the 3 I ran. I guess it more closely matches the average GEDmatch kit in ancestry.
    PS: It's nice being able to do direct comparisons like this
    Last edited by dp; 11-17-2014 at 06:43 PM. Reason: removed errant spoiler
    Grace and good eure and long prosperitee. [Lydg. Mum. Goldsmiths]

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

  5. #4
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    This is other view to my GEDMATCH results:

    It seems that there is a clear correlation between Ashkenazi ancestry and the average distance. In Eurogenes Jtest and in 23andMe test these persons have the following percentage of Ashkenazi ancestry:
    HK: 25,14 % - 63,5 %
    BK: 16,17 % - 42,6 %
    HB: 14,58 % - 34,6 %
    JB: 9,04 % - 13,7 %
    SM: 6,88 % - 13,2 %
    others below 5 %.

    I don't know what is the reason - maybe just Jews do more DNA testing than other populations.

    In fact, I even don't believe that there are really so many so close relatives.
    Y-DNA: R-Y14088 (ISOGG: R1b1a1a2a1a2b1c2b1a1a)
    mtDNA: J1c1i (J1c1 + 7735G and 8848C) Extras: 198T 12007A 16422C 16431A

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     dp (11-17-2014)

  7. #5
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    Maybe more endogamy in your graph's kits explains the generational shift.
    I guess the dip (in our initial graphs) are effects of endogamy simulating/causing a genetic bottleneck in our graphs.
    dp :-)
    Last edited by dp; 11-17-2014 at 07:56 PM.
    Grace and good eure and long prosperitee. [Lydg. Mum. Goldsmiths]

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  8. #6
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    Well. I'm certainly getting a different result from you guys. This is from my FTDNA kit:

     


    And my 23andMe kit:

     


    Seven generations sounds a bit high to refer to the mass emigration events of the late-ish 19th century, but perhaps not impossible. I'm thinking a lot more descendants of those who left for the US have tested, compared to the descendants of those staying behind, maybe?

    EDIT: Added 23andMe graph for comparison. It's interesting that the two differ noticeably. The amplitude of about everything is less for 23andMe, but then it does seem to get fewer matches.
    Last edited by Salkin; 11-17-2014 at 10:56 PM.
    GEDmatch kits:
    M606752 (23andMe)
    F367588 (FTDNA)

    ySearch & mitoSearch: DK8FB

    FTDNA kit: 367588

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     dp (11-18-2014)

  10. #7
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    Quote Originally Posted by Salkin View Post
    Well. I'm certainly getting a different result from you guys. This is from my FTDNA kit:

     


    And my 23andMe kit:

     


    Seven generations sounds a bit high to refer to the mass emigration events of the late-ish 19th century, but perhaps not impossible. I'm thinking a lot more descendants of those who left for the US have tested, compared to the descendants of those staying behind, maybe?

    EDIT: Added 23andMe graph for comparison. It's interesting that the two differ noticeably. The amplitude of about everything is less for 23andMe, but then it does seem to get fewer matches.
    Yep, but you do have a peak at 5.2gens, which is basically where the kits we ran also have one. This mean you have a sudden dip after the point. It appears that there have not been many Swedish kits processed by either company yet.
    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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     Salkin (11-18-2014)

  12. #8
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    I came across a kit with very few matches, well at least not 1500. In case your thinking it, based on the id number it doesnt appear to be a phased kit {starting with P} or one formed by Lazarus {starting with L}. With normal defaults (7cM) the kit had 204 matches. I lowered the minimum criteria. I found at that 5cM is the mininum that one-to-many will generate. This yielded a max GD=7.7 Even with that, the kit only had 680 matches.
    I'm curious how few matches do some of Anthrogenica's users get, and what is the max GD? The kits I've tested with FamilyTreeDNA have a max GD of 7.1. A 23andme kit goes up to 7.4 generations. All have 1500 matches.
    dp
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    Quote Originally Posted by David Powell View Post
    I came across a kit with very few matches, well at least not 1500. In case your thinking it, based on the id number it doesnt appear to be a phased kit {starting with P} or one formed by Lazarus {starting with L}. With normal defaults (7cM) the kit had 204 matches. I lowered the minimum criteria. I found at that 5cM is the mininum that one-to-many will generate. This yielded a max GD=7.7 Even with that, the kit only had 680 matches.
    I'm curious how few matches do some of Anthrogenica's users get, and what is the max GD? The kits I've tested with FamilyTreeDNA have a max GD of 7.1. A 23andme kit goes up to 7.4 generations. All have 1500 matches.
    dp
    I have 7.5 generation but it may be incomplete, I reach 1500 matches.
    Here my graphic:
    Attachment 3258
    Y haplogroup: R1b: L21 --> DF13 --> BY145002
    The oldest L21 known are I2457 et I2565 from Stonehenge (Beaker Culture, 2400-1900 BC)

    MTDNA: U4c1
    The oldest U4c1 known are "poz224", Yamnaya culture (2882-2698 BC), and 2 Bell-Beaker in Germany (Karsdorf, 2314-2042 BC)

    Paternal MTDNA: K1b2b
    The oldest K1b2 are Eastern European Mesolithic: Kunda Donkalnis5 (Lithuania), 6000 BC and Meso-Ene Lepenski Vir Lepe28 in Serbia, 5900 BC.
    The oldest K1b2b is Alt-3, Corded-Ware Germany (2500 BC)

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     dp (12-20-2014)

  15. #10
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    Quote Originally Posted by Tolan View Post
    I have 7.5 generation but it may be incomplete, I reach 1500 matches.
    Here my graphic:
    Attachment 3258
    I was surprised how flat the graph of your <7 gen matches were, especially considering your haplogroups, etc.
    dp :-)
    Grace and good eure and long prosperitee. [Lydg. Mum. Goldsmiths]

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