Results 1 to 7 of 7

Thread: Understanding your admixture results

  1. #1
    Gold Member Class
    Posts
    5,100
    Sex

    Understanding your admixture results

    Folks,

    I have a new article titled "How to interpret your ancestry admixture results" at http://www.eurasiandna.com/2018/08/1...xture-results/

    [IMG][/IMG]

    It is a work in progress.
    EurasianDNA.com - A study of the population history of West & South Asia.

  2. The Following 16 Users Say Thank You to Kurd For This Useful Post:

     chelle (09-12-2018), Dorkymon (09-14-2018), evon (09-12-2018), Hanna (09-12-2018), Jatt1 (09-12-2018), JMcB (09-14-2018), jortita (09-12-2018), khanabadoshi (09-12-2018), LEPAGE64 (09-14-2018), lukaszM (09-14-2018), Nibelung (09-12-2018), NK19191 (09-12-2018), Reza (09-12-2018), St. Pierre (09-16-2018), vettor (09-15-2018), ZephyrousMandaru (09-13-2018)

  3. #2
    Registered Users
    Posts
    1,045
    Sex
    Omitted

    Very informative. For part of the target audience, your admixture run might confuse them as well. 3% South-Asian in English and Czech?
    When components don't encompass the variation of the samples run through afterwards, weird things happen.
    That and it could reflect shared ancestry, rather than one-way flow, e.g. Iran_N into both Paniya and Central+West-Asians.
    In the case of English & Czech, Iran_N and CHG might be close enough to conflate.

    As always though, I admire your generativity in taking the time to explain a lot of these tough to understand topics.
    Last edited by Kale; 09-12-2018 at 05:26 AM.
    PM me for d-stats. If I have the samples I will run them. Also, here is a collection of 14,000. Part 1: Hidden Content Part 2: Hidden Content Part 3: Hidden Content Looking for: KEB-IAM-TOR in plink/eigenstrat 1240k panel

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

     Jatt1 (09-12-2018), khanabadoshi (09-12-2018)

  5. #3
    Registered Users
    Posts
    534
    Sex
    Omitted
    Ethnicity
    Turkish
    Y-DNA
    J2a4h2f* (J-L192)
    mtDNA
    H, U3b

    Turkey Ottoman Empire Ottoman Empire 2
    Which gedmatch calculator do you think is the best for picking up East Asian admixture?
    Asking the same for the Caucasus component.

  6. #4
    Gold Member Class
    Posts
    5,100
    Sex

    Quote Originally Posted by Kale View Post
    Very informative. For part of the target audience, your admixture run might confuse them as well. 3% South-Asian in English and Czech?
    When components don't encompass the variation of the samples run through afterwards, weird things happen.
    That and it could reflect shared ancestry, rather than one-way flow, e.g. Iran_N into both Paniya and Central+West-Asians.
    In the case of English & Czech, Iran_N and CHG might be close enough to conflate.

    As always though, I admire your generativity in taking the time to explain a lot of these tough to understand topics.
    Yes , that’s the implication of the 3%. It’s all about allele frequencies. For example, the Czech or English subject may have the A allele at position rs1234. From all the component references, Paniya may have the highest frequency of A at rs1234. Let’s say 10 out of 18 Paniya references have the A allele. This translates to approximately a frequency of 55% . However, if say some Caucasus population was added to make a K6, we May find that Caucasians have a frequency of 80% at position rs1234. In this case the A allele would be more associated with Caucasians and not Paniya

    It’s all give or take sometimes to get something you may have to give up a little of something else
    EurasianDNA.com - A study of the population history of West & South Asia.

  7. The Following 2 Users Say Thank You to Kurd For This Useful Post:

     Jatt1 (09-12-2018), poi (09-12-2018)

  8. #5
    Gold Member Class
    Posts
    5,100
    Sex

    Quote Originally Posted by Hanna View Post
    Which gedmatch calculator do you think is the best for picking up East Asian admixture?
    Asking the same for the Caucasus component.
    None if you are trying to gauge total east Asian gene flow post bronze age , because they are all loaded with West Eurasian references who are themselves East Asian admixed post bronze age . They also have too high of a ratio of non-references to references . They are fine however for general clustering of populations as you can see from the oracles however they do minimize intra-population variation
    EurasianDNA.com - A study of the population history of West & South Asia.

  9. The Following 3 Users Say Thank You to Kurd For This Useful Post:

     Jatt1 (09-12-2018), jortita (09-13-2018), poi (09-12-2018)

  10. #6
    Gold Member Class
    Posts
    5,100
    Sex

    Users with ethnic backgrounds from Iran (all parts), Iraq, Turkey, or the Caucasus are welcome to post screenshots of their 23andMe results for comparison in the comments section of the article to see how similar they are to the Kurdish subject results posted there, since there don't appear to be many such results posted online.

    To post an image in the comments section, users can paste either the "direct link" or "BBCode" of their image in the comments section.

    Please ensure that the image you post is yours and not someone else's.
    EurasianDNA.com - A study of the population history of West & South Asia.

  11. The Following User Says Thank You to Kurd For This Useful Post:

     St. Pierre (09-16-2018)

  12. #7
    Registered Users
    Posts
    5,861
    Sex
    Location
    Torun
    Ethnicity
    Central 75% + 25% Mazovia
    Nationality
    Pole
    Y-DNA
    R1a > M198 > YP 1337

    Poland
    Very interesting Kurd! One question, what you think of using Sardinians instead Basques for European component reference?

  13. The Following 4 Users Say Thank You to lukaszM For This Useful Post:

     Jatt1 (09-15-2018), JMcB (09-14-2018), Ruderico (09-14-2018), St. Pierre (09-16-2018)

Similar Threads

  1. Understanding my results K13
    By Luarev in forum General
    Replies: 2
    Last Post: 06-19-2018, 08:15 AM
  2. Understanding my results
    By Chris.james.anderson@live in forum Living DNA
    Replies: 1
    Last Post: 05-25-2018, 03:01 PM
  3. Understanding Results
    By flannelberry in forum General
    Replies: 16
    Last Post: 04-29-2017, 06:51 PM
  4. Understanding my Autosomal results
    By MitchellSince1893 in forum Autosomal (auDNA)
    Replies: 2
    Last Post: 10-04-2015, 05:53 PM
  5. Help understanding certain results?
    By indigo in forum Open-Source Projects
    Replies: 1
    Last Post: 01-25-2014, 03:05 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •