Page 3 of 3 FirstFirst 123
Results 21 to 23 of 23

Thread: Reconstructing Prehistoric African Population Structure

  1. #21
    Registered Users
    Posts
    202
    Sex
    Y-DNA
    E1b1b1a1a2
    mtDNA
    T1

    Nice to see the mixture models being tested in nMonte. We know there is some sort of relationship between the Mota-related Ethiopian highland ancestry, and hunter-gatherers farther south, so it's not surprising that both groups can be used in the models. Although I think it's notable that it prefers the Khoisan populations for the Tanzanian pastoralist.

    As you have noted in the past, there is some diffuse "San" affinity that is associated with Mota/Omotic-related ancestry. The authors of this paper even manage to fit some Hadza, as well as the Kenya 400BP and Tanzania Pemba 1400BP samples, as 100% Mota-related. These models look rather crude though, and Mota-related populations have vastly different uniparental markers from East African HGs sampled by Hirbo (e.g. the latter have lot of mtDNA L0f, also common in modern South Cushites, and interestingly found in 1 ancient Malawian). I would bet that with some new aDNA from East African HGs south of Ethiopia, or perhaps even the modern East African HGs sampled by Hirbo, they would be a much better fit for the HG ancestry in South Cushites, as well as the "Mota-related" ancient Kenyan/Tanzanian samples.
    Last edited by Lank; 09-26-2017 at 08:16 AM.

  2. The Following 10 Users Say Thank You to Lank For This Useful Post:

     Agamemnon (09-26-2017), Awale (09-26-2017), beyoku (09-26-2017), blackflash16 (09-27-2017), drobbah (09-26-2017), Megalophias (09-26-2017), NiloSaharan (09-27-2017), pgbk87 (09-26-2017), Power77 (10-10-2017), Targum (10-09-2017)

  3. #22
    Gold Member Class
    Posts
    515
    Sex
    Location
    Gulf of Fars
    Ethnicity
    Somali
    Y-DNA
    E-V32
    mtDNA
    N1a

    Somalia Ethiopia Eritrea Djibouti
    Quote Originally Posted by Lank View Post
    As you have noted in the past, there is some diffuse "San" affinity that is associated with Mota/Omotic-related ancestry. The authors of this paper even manage to fit some Hadza, as well as the Kenya 400BP and Tanzania Pemba 1400BP samples, as 100% Mota-related. These models look rather crude though, and Mota-related populations have vastly different uniparental markers from East African HGs sampled by Hirbo (e.g. the latter have lot of mtDNA L0f, also common in modern South Cushites, and interestingly found in 1 ancient Malawian). I would bet that with some new aDNA from East African HGs south of Ethiopia, or perhaps even the modern East African HGs sampled by Hirbo, they would be a much better fit for the HG ancestry in South Cushites, as well as the "Mota-related" ancient Kenyan/Tanzanian samples.
    I totally agree. Modelling the South-Erythraean as part South-Africa 1,300ybp fits better and makes more sense with other data than Omotic-speaker related ancestry. Also, the Maasai_Kinyawa actually fit quite well as Luxmanda + Dinka:

    [1] "distance%=0.3802 / distance=0.003802"

    Masai_Kinyawa

    Tanzania_Luxmanda_3000BP 50.7
    Dinka 49.3

    Interestingly, however, when I added Somalis in, they shook up the results:

    [1] "distance%=0.1731 / distance=0.001731"

    Masai_Kinyawa

    Dinka 47.1
    Tanzania_Luxmanda_3000BP 26.9
    Somali 25.9

    Wonder if this points to these Masais having admixture from later East-Erythraeic speakers. Idk... Great comments as always, by the way.

  4. The Following 8 Users Say Thank You to Awale For This Useful Post:

     Agamemnon (10-09-2017), blackflash16 (10-09-2017), Lank (10-10-2017), Megalophias (10-09-2017), pgbk87 (10-10-2017), Power77 (10-10-2017), Targum (10-09-2017), Tsakhur (10-10-2017)

  5. #23
    Registered Users
    Posts
    33

    Quote Originally Posted by Awale View Post
    I totally agree. Modelling the South-Erythraean as part South-Africa 1,300ybp fits better and makes more sense with other data than Omotic-speaker related ancestry. Also, the Maasai_Kinyawa actually fit quite well as Luxmanda + Dinka:

    [1] "distance%=0.3802 / distance=0.003802"

    Masai_Kinyawa

    Tanzania_Luxmanda_3000BP 50.7
    Dinka 49.3

    Interestingly, however, when I added Somalis in, they shook up the results:

    [1] "distance%=0.1731 / distance=0.001731"

    Masai_Kinyawa

    Dinka 47.1
    Tanzania_Luxmanda_3000BP 26.9
    Somali 25.9

    Wonder if this points to these Masais having admixture from later East-Erythraeic speakers. Idk... Great comments as always, by the way.
    Truth be told I envision Massai as having 3 successive waves of northern admixture. The last 2 being post Ethnogenisis. V32, V22, M293, and T2 IMO didn’t all travel in tandem into the Rift Valley and Great Lakes / Nile Basin.

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

     Awale (10-09-2017), blackflash16 (10-10-2017), pgbk87 (10-10-2017), Power77 (10-10-2017), Targum (10-09-2017), Tsakhur (10-10-2017)

Page 3 of 3 FirstFirst 123

Similar Threads

  1. The population genetic structure of Sicily and Greece
    By firemonkey in forum Ancient (aDNA)
    Replies: 10
    Last Post: 05-19-2017, 01:52 AM
  2. Replies: 3
    Last Post: 02-18-2017, 08:05 AM
  3. Replies: 24
    Last Post: 09-03-2016, 08:31 AM
  4. Replies: 8
    Last Post: 03-27-2016, 11:50 AM
  5. Replies: 55
    Last Post: 02-21-2016, 04:24 PM

Posting Permissions

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