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Thread: I-2535/1953 and family finder match (please help)

  1. #1
    Junior Member
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    I-S2202
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    H27f

    Slovenia

    I-2535/1953 and family finder match (please help)

    Hello,

    I'm from Slovenia and part of I-Z140 group.
    When I got my first results back from Familytreedna (familyfinder and Y37) I noticed that I have one 12 STR match (he is I-S12289) from UK which also apear as my match in my familyfinder (we share centimorgans: 22; longest block: 8)! I did a BIGY and found out that we are both in the same group under (I-Z140-Z2535/S1953). I'm I-A16098 he is I-S12289.

    I-M253-DF29-Z58-Z60-Z140-Z2535/S1953-YSC261/S1978-L338/S197-S12289
    I-M253-DF29-Z58-Z60-Z140-Z2535/S1953-Z2538-Z2536-S2202-A16098

    How is this even possible? Misstake, coincidence?
    We could not share any "recent" ancestors he is from UK and I'm from Slovenia (I have some paper trail ancestors from Germany and that is all).

    Can someone please help me with this? Could we share 22 centimorgans from our ancient ancestor Z2535/S1953?

    Thank you very much!

    Great day to all!

  2. The Following User Says Thank You to Divad For This Useful Post:

     JonikW (01-14-2019)

  3. #2
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    J1c1

    United Kingdom England England North of England Norfolk Scotland Ireland
    Hello fellow I-Z140! You and this match are not that closely related on the Y-DNA line. Your last common ancestor on the Y line was about 4100 years ago before going on their separate pathways. The Y12 result is a false positive that sneaks under the threshold because of the small number of markers tests - you'll notice that this match likely doesn't appear at in your lists (Y25, Y37, Y67, Y111) as there more markers to compare and more differences.

    I don't think there is any mistake in the results - sometimes no calls and low reads can show inconclusive results for SNPs, but there's quite a few on both of your lists that agree with the branching on the phylogenetic tree, and there are also several phyloequivalent SNPs (for example, 5 at Z2538 and 11 at YSC261) that would all have to be read wrong to make it a mistake.

    Regarding the same individual on FamilyFinder, any shared autosomal DNA is unlikely to be from the Y-line ancestor as any autosomal DNA inherited from the mutual Y-line ancestor would be filtered out due to genetic recombination over the generations. It could be any of the non-Y lines. I'd be more confident if it was a full segment of 22cM - that would give more confidence. However, FTDNA reports segments that are as small as 1cM in order to get to the total number of centimorgans. Longest block means that the largest one is 8cM and the remaining 14cM is broken up into multiple smaller segments. I'd say 8cM falls into the unreliable category when deciding whether a segment is identical by descent (IBD) or identical by state (IBS). Some good overviews here https://thegeneticgenealogist.com/20...ment-round-up/ and here https://isogg.org/wiki/Identical_by_descent

  4. The Following 2 Users Say Thank You to deadly77 For This Useful Post:

     Divad (01-14-2019),  JonikW (01-14-2019)

  5. #3
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    I-A14097

    Canada Netherlands United Kingdom Ireland France
    Well, deadly77 summarizes it perfectly.

    Welcome to the forum! Nice to see another I-Z140 member here!
    Y-DNA: I-A14097(Scotland),
    Big Y: I-F2642>Y1966>Y3649>A13241>Y3647>A14097 (1,850 YBP)
    mtDNA: pending (Westeremden, Netherlands)
    Other lines:
    R-M222 x2, R-L21 x2, I-M223, R-S1141, R-U198 & R-U106, mtHg J1c3
    Known ancestry
    Paternal: Britain & Ireland, France and Germany
    Maternal: Netherlands

  6. The Following 3 Users Say Thank You to spruithean For This Useful Post:

     deadly77 (01-14-2019),  Divad (01-14-2019),  JonikW (01-14-2019)

  7. #4
    Junior Member
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    H27f

    Slovenia
    Thank you deadly77 and spruithean!

  8. The Following User Says Thank You to Divad For This Useful Post:

     deadly77 (01-14-2019)

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