HarappaWorld HRP0250-HRP0252

Posted by on August 6, 2012

I have added the HarappaWorld Admixture results for HRP0250-HRP0252 to the individual spreadsheet.

However, I have not recomputed the weighted averages for the Kashmiris or Bengali Brahmins. Also, I am not sure about Tamil Gounder. Wikipedia says they are Vellalars, but I don't know if I should report separate Gounder results or include in the Tamil Vellalar average.

Do note that the admixture components do not necessarily represent real ancestral populations. Also, the names I have chosen for the components should be thought of as mnemonics to ease discussion. I chose them based on which populations in my data these components peaked in. They do not tell anything directly about ancestral populations. The best way to look at these admixture results is by comparing individuals and populations. Finally, the standard error estimates on these results can be about 1%. Therefore, it is entirely possible that your 1% exotic admixture result is just noise.

Admixture,

5 Comments.

  1. SB August 6, 2012 at 12:53 pm

    Thanks Zack. Maybe the participant can clarify which "Vellalar" group they belongs to. Because they identified themselves as Gounder(and not Vellalar), my guess would be Kongu Vellalars.

    Also, is there a way to impose constraint data fiting? I see 13% allocated into different random bins for HRP252, and hence very noisy. If there was a way to assign a high cost to any solution with many components <2 , may come up with with a solution with less noise.

  2. Vijay August 8, 2012 at 10:44 am

    Re: goudar and vellalar; not a critical difference. Both groups possibly 60% south Indian 33% Baloch.

    If you keep subdividing further you will get spurious differences like the one between TN-Dalit and TN-scheduled class, in your results; both of which are of course the same, and may, posssbibly be that different.

    • SB August 8, 2012 at 11:48 am

      The Dalit and SC are not monolithic populations, but an umbrella term for a wide group, ranging from the Irula to Paraiyar. I would expect some differences within these groups.

  3. malcolm Sweet June 5, 2013 at 7:44 am

    I joined 23 and me to try and find out about my family and ancestors, I am r1a1a paternal line.
    Unfortunately all I find is clusters,groups,percentages and not a single person who helps to try and understand the data.
    Malcolm