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Thread: Reference populations for AncestryDNA

  1. #21
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    Oh, Look! Calais has gone back to Britain again. Mary Tudor would be so proud.

  2. #22
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    Quote Originally Posted by sktibo View Post
    Attachment 12078

    I had given up on trying to find out where their population samples come from, until I came across this little image...

    Does anyone have a larger version?

    Thank you
    I don't believe they have reference sample from all over Poland. It's simply impossible because there are only few Polish regional samples published in some studies, and each from limited area (not to mention Estonian Poles).
    Paypal payment for making K36 map: Hidden Content
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  3. #23
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    Quote Originally Posted by lukaszM View Post
    I don't believe they have reference sample from all over Poland. It's simply impossible because there are only few Polish regional samples published in some studies, and each from limited area (not to mention Estonian Poles).
    I forget who mentioned it, but, supposedly the new breakdown is based on autosomal DNA relatives, and their place of ancestry. so for example 15% of my DNA relatives are from East Europe, which is the percentage I have for autosomal. Idk how accurate/inaccurate that is with regards inferring ethnic composition.
    Known Ancestry: Albanian
    23andme results: 94% Balkan, 0.9% Italian, 0.8% Middle Eastern, 2.2% broadly southern European, 0.3 British & Irish, 0.3% Japanese, 0.5% unassigned
    MyOrigins2.0: 100% Southeast European
    MyAncientOrigins: 62% Farmer, 24% Hunter Gatherer, 14% Metal Age Invader
    MyHeritage: 76% Greek, 16% Balkan, 8% Italian
    WeGene: 99.5% Balkan, 0.5% unassigned
    GenePlaza: 92.7% East Mediterranean, 5.2% Southwestern European, 1.5% Ambiguous
    DNA.LAND: 95% Balkan, 5% Sardinian

  4. #24
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    Interesting references: "Eastern European" almost reaching Swiss Alps, "Finnic" in Latvia.

  5. #25
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    Quote Originally Posted by Dibran View Post
    I forget who mentioned it, but, supposedly the new breakdown is based on autosomal DNA relatives, and their place of ancestry. so for example 15% of my DNA relatives are from East Europe, which is the percentage I have for autosomal. Idk how accurate/inaccurate that is with regards inferring ethnic composition.
    That only applies to the Genetic Communities, not to your ethnicity percentages.

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     A Norfolk L-M20 (11-15-2017)

  7. #26
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    I found the original image from https://thegeneticgenealogist.com/20...city-estimate/ - but I don't know if that's where the OP found it.

    In Ancestry's white paper, they have this Figure6.1.jpg which seems to show a thumbnail image of it. Shame they won't make the full thing accessible. It looks like a "my google map" so if they made it public, it would be really interesting to explore.

    https://www.ancestry.com/cs/dna-help...ity/whitepaper

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     sktibo (11-14-2017)

  9. #27
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    Ancestry DNA results are light for Mediterranean people of mixed ethnicity. I have a cousin that is literally half Calabresi and she only got 30% Italian/Greek. another is an honest one quarter Abruzzi and only got 17% Italian/Greek.
    86.8% Orcadian + 13.2 Cypriots (Behar) @ 0.7
    87.4% Orkney + 12.6% Sicilian @ 1.64
    86% Frisian + 14% Italian_South @ 1.99
    85% Frisian + 15% Sicilian_Center @ 2.04
    50% Dutch +25% Italian +25% Scottish @ 2.552180
    Albanian + Dutch_South + English_South + Norwegian @ 1.377633
    English_South + German_South + Greek + Icelandic @ 1.376707
    British_Isles + C_Italian + CEU30 + Lithuanian @ 0.773760

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     sktibo (11-15-2017)

  11. #28
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    Itís odd that any reference sample would get 100% for a region or 0%. I wonder how many different alleles they consider native to a region?

  12. #29
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    Quote Originally Posted by JerryS. View Post
    Ancestry DNA results are light for Mediterranean people of mixed ethnicity. I have a cousin that is literally half Calabresi and she only got 30% Italian/Greek. another is an honest one quarter Abruzzi and only got 17% Italian/Greek.
    If a Mediterranean person is of mixed ethnicity, why wouldn't you expect to see lower results for Italy/Greece and some from surrounding areas? Isn't that what being of mixed ethnicity means, that you're going to find results in more than just Italy/Greece?

  13. #30
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    Quote Originally Posted by RobinBMc View Post
    If a Mediterranean person is of mixed ethnicity, why wouldn't you expect to see lower results for Italy/Greece and some from surrounding areas? Isn't that what being of mixed ethnicity means, that you're going to find results in more than just Italy/Greece?
    if you are half southern Italian as in your father just got off the boat and your mother is English and German, it would be reasonable to see a 50% Italy/Greece segment, not 30%.... and so on if we use conventional arithmetic.
    86.8% Orcadian + 13.2 Cypriots (Behar) @ 0.7
    87.4% Orkney + 12.6% Sicilian @ 1.64
    86% Frisian + 14% Italian_South @ 1.99
    85% Frisian + 15% Sicilian_Center @ 2.04
    50% Dutch +25% Italian +25% Scottish @ 2.552180
    Albanian + Dutch_South + English_South + Norwegian @ 1.377633
    English_South + German_South + Greek + Icelandic @ 1.376707
    British_Isles + C_Italian + CEU30 + Lithuanian @ 0.773760

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