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Thread: Ancient Eurasia K6 - Deducing Traces of Back to Africa Migrations

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    Ancient Eurasia K6 - Deducing Traces of Back to Africa Migrations

    Was there an ASI (Andamese/Papuan-like) migration back-to-Africa ~30kya?

    Calling upon Africans to post their GedrosiaDNA (gedmatch calc) - Ancient Eurasia K6 results.
    Feel free to share any related papers or personal observations for discussion



    My results:

    Ancestral_North_Eurasian -
    Ancestral_South_Eurasian 4.60
    East_Asian -
    West_European_Hunter_Gartherer -
    Natufian 3.14
    Sub_Saharan 92.21


    Family's results:

     

    *All family members are >99% SSA on modern admix calculators (ie. no recent eurasian admixture)


    My observations and some noteworthy back-to-africa papers:
     
    I'm mostly interested in screening for traces of an ancestral south eurasian (Ancient South Indian/Andamese-like) component which seems to exhibit itself at low levels throughout East, Central and Northern African populations -- it's oddly apparent at non-negligible levels among SSAs that have no modern eurasian admixture (>99%SSA) which might give credence to notions of an ASI back-to-africa migration following the late glacial maximum (see paper under "observations" for details of younger M1 mtdna in East-Africa). On different ancient admix calculators, I noticed the afmd component is oftentimes accompanied with E_Asian/Papuan/Oceania-like affinities at non-negligible levels >2% - I'm curious if this is also just noise or part of an aggregate ASI/E_Asian population (ex. Onge) said to have anciently migrated back to Africa.

    Within East-African SSA populations, one might argue the Ancestral S_Eurasian and E_Asian affinities are not direct and were passed through Cushitic intermediaries but proportionately this argument doesn't hold when comparing the results of other East-African populations with drastically varying "Cushitic" ancestry (Somali, Maasai, Hadza) -- on the calc's spreadsheet, these populations all have averages of ~2% S_Eurasian and E_Asian affinities despite having varying Natufian-like ancestry found in horners.

    This paper, Ancient Human Migration after Out-of-Africa -- Daniel Shriner, Fasil Tekola-Ayele, Adebowale Adeyemo & Charles N. Rotim (2016) , suggests a possible back to Africa migration from India to East Africa; the presence of M1 is cited as supporting evidence:
     
    Using autosmal ancestry-specific allele frequencies and a graph-based model implemented in TreeMix, the paper estimates different migration events which happen to show "non-tree-like behavior" :

    Ancient Human Migration after
    Out-of-Africa
    Daniel Shriner, Fasil Tekola-Ayele, Adebowale Adeyemo & Charles N. Rotimi


    ...The second migration event indicates that Cushitic ancestry is a mixture of ancestries closely related to Nilo-Saharan/Omotic and Arabian ancestries. This migration event resolves the observed unstable placement between East African and Middle Eastern ancestries3,4,6: Cushitic ancestry has both East African and Middle Eastern origins. The fourth migration event indicated gene flow between Indian ancestry and the common ancestor of Arabian, Levantine-Caucasian, Northern European, and Southern European ancestries. In conjunction with the second migration event, this event connects India to East Africa. Taken together, these two events are consistent with the presence among East Africans of the mitochondrial DNA haplogroup M1, possibly reflecting migration from India to East Africa following the Last Glacial Maximum13,14,15.



    https://www.ncbi.nlm.nih.gov/pmc/art.../srep26565.pdf





    Interestingly, I also found my Central-Sudanic side of the family were the only members with traces of N_Eurasian affinities -- this seems to go inline with the traces of the "Metal Age Invader" (FTDNA's ancientorigins) that were also only found with this side of the family.

    This paper delves into the genetic footprint of multiple Eurasian migrations into the Central-Sudanic region (present-day Chad). The traces of Ancestral N_Eurasian found on the C. Sudanic side of the family might be from the suggested African Humid Period. Based on R1b carriers in the region, the paper estimates the Chad R1b-V88 Y chromosomes coalesced 5,700–7,300 years ago: Chad Genetic Diversity Reveals an African History Marked by Multiple Holocene Eurasian Migrations
    Last edited by Angoliga; 02-28-2017 at 03:26 AM.

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    Here's the results of Africans in and around Central-East Africa, they're all distant GEDmatches of immediate family members:

    Half Congolese(Bashi Tribe), half Rwandan (unknown ethnic group *probable Cushitic influence(Tutsi)):

    Ancestral_North_Eurasian 0.82
    Ancestral_South_Eurasian 0.51
    East_Asian 1.45
    West_European_Hunter_Gartherer 2.81
    Natufian 9.68
    Sub_Saharan 84.73

    Congolese (identified as Yembe, Central Congo?)
    Ancestral_North_Eurasian -
    Ancestral_South_Eurasian 0.43
    East_Asian 0.08
    West_European_Hunter_Gartherer 0.13
    Natufian 0.48
    Sub_Saharan 98.88


    Kenyan (unknown ethnic group)
    Ancestral_North_Eurasian 1.27
    Ancestral_South_Eurasian 1.16
    East_Asian 1.22
    West_European_Hunter_Gartherer 0.26
    Natufian 4.09
    Sub_Saharan 91.99

    half Ugandan (West-Nile region), half South Sudanese (Equatoria region, unknown ethnic group)
    Ancestral_North_Eurasian 0.17
    Ancestral_South_Eurasian 2.12
    East_Asian 1.00
    West_European_Hunter_Gartherer -
    Natufian 5.07
    Sub_Saharan 91.64


    At first, I presumed the Ancestral_South_Eurasian and E_Asian results might be a bizarre rendering of my pygmy affinity but similarly to members in my immediate family, this Congolese match also has notable pygmy affinities ~10% yet lacks any ASE/E_Asian affinities above noise level.

    The lack of these affinities in this Congolese match seems to agree with the idea that the ASE/E_Asian Back-to-Africa migration didn't expand into Western Africa. The Yoruba sample-set shows an average 100% Sub_Saharan on the calc's spreadsheet, further north/west the average Gambian however shows a hint of Ancestral S_Eurasian at 1.10%. Could this be from traces of ancient East-African migrations across the Sahel? Interestingly, the only West-African affinity of my immediate family on DNA.land is from the Senegalese River Valley and the Lower Niger river -- I assume this is due to ancient bidirectional migrations perhaps during the last Holocene .
    Last edited by Angoliga; 02-28-2017 at 03:24 AM.

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    Quote Originally Posted by NiloSaharan View Post

    At first I thought the ASI and E_Asian affinities might be bizarre.
    .
    Hey NiloSaharan, have a look at this:

    http://thegoldengnomon.blogspot.ca/2...trikingly.html

    Tell me what do you think.
    “The only true wisdom is in knowing you know nothing.”
    ― Socrates


    “The unexamined life is not worth living.”
    ― Socrates

    “There is only one good, knowledge, and one evil, ignorance.”
    ― Socrates

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    I smell a tangent brewing but hopefully the convo will swing back sooner than later...

    Quote Originally Posted by Power77 View Post
    Hey NiloSaharan, have a look at this:

    http://thegoldengnomon.blogspot.ca/2...trikingly.html

    Tell me what do you think.
    These common physical traits between some East-Asian and SSA populations can mislead people (*not implying you) to believe there must be a recent common genetic connection between the two populations when in fact, if we were to make the comparison between even more strikingly similar "black" looking East-Asian populations (ie. Papuans), we'd find they're genetically (yDNA, mtDNA and autsomally) anchored and closer related to other Asian populations than to SSAs.

    I've seen striking similarities between Khoisan/San-like groups, even many Southern-Sudanese who have strikingly similar physical features to some East-Asians (ie. epicanthic folds, broad facial bone structure etc) -- IMO, without any academic reference handy, I think and believe it's already been proven that it's just human adaptation. Perhaps their common, near-treeless ancestral regions (The Kalahari, Sahara and Eastern Steppe) of these three afmd groups might explain some of their common physical traits -- that's pure speculation and conjecture on my part though
    Last edited by Angoliga; 02-28-2017 at 04:25 AM.

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    Instead of posting individual copts, I just decided to post the average result of the coptic samples I have

    Ancestral_North_Eurasian 17.45
    Ancestral_South_Eurasian 1.28
    East_Asian 0.64
    West_European_Hunter_Gartherer 14.37
    Natufian 55.01
    Sub_Saharan 11.32

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    Results of my 2 Tunisian genocousins:
    Ancestral_North_Eurasian 13.38
    Ancestral_South_Eurasian 0.75
    East_Asian 1.06
    West_European_Hunter_Gartherer 21.97
    Natufian 46.30
    Sub_Saharan 16.53

    Ancestral_North_Eurasian 12.26
    Ancestral_South_Eurasian 1.36
    East_Asian -
    West_European_Hunter_Gartherer 24.91
    Natufian 46.04
    Sub_Saharan 15.44
    My closest oracles:
    1 CEU + Morocco_Jews + Swedish + Sahara_OCC @ 1.618438 DODECAD V3
    1 BedouinA + German_North + Scottish_West + Tunisian @ 1.355784 puntDNAL K12 Modern
    1 Algerian + BedouinA + British + Norwegian_West @ 2.072077 MDLP K23b

    A thread where I explain how the Tunisian sample used by various gedmatch calcs is not representative of Tunisians:
    Hidden Content

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    United Kingdom Netherlands Mauritius Madagascar India China Qing Dynasty
    My mother is half Mauritian, half british. We were expecting a lot more SSA but ended up with a lot of SEA, EA and SA, probably through Madagascar from slavery times and Indian from the indentured labourers. We think there might have been some Chinese indentured labourers in there somewhere as well though finding the proof is difficult.

    Admix Results (sorted):

    # Population Percent
    1 East_Asian 24.26
    2 West_European_Hunter_Gartherer 23.17
    3 Natufian 17.49
    4 Sub_Saharan 16.99
    5 Ancestral_North_Eurasian 12.25
    6 Ancestral_South_Eurasian 5.85
    Ethnogene: 51.4% NW European, 21.6% W European, 10.1% Southeastern African, 9.5% Southeast Asian, 4.4% South Asian, 2% Scandinavian, 1% East African
    Papertrail: 75% NW European, 25% Mauritian Creole

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    Somali cousins:
     

    Ancestral_North_Eurasian 5.52
    Ancestral_South_Eurasian 0.25
    East_Asian 1.16
    West_European_Hunter_Gartherer 5.89
    Natufian 30.61
    Sub_Saharan 56.58

    Ancestral_North_Eurasian 7.00
    Ancestral_South_Eurasian 2.00
    East_Asian 0.07
    West_European_Hunter_Gartherer 5.72
    Natufian 30.75
    Sub_Saharan 54.45


    Me and other Benadiris who have south-asian+other west asian ancestry through centries (possibly longer) of trade and interaction.
     

    Ancestral_North_Eurasian 16.73
    Ancestral_South_Eurasian 7.25
    East_Asian 6.32
    West_European_Hunter_Gartherer 6.02
    Natufian 28.68
    Sub_Saharan 35.01

    Ancestral_North_Eurasian 17.66
    Ancestral_South_Eurasian 8.82
    East_Asian 6.95
    West_European_Hunter_Gartherer 2.47
    Natufian 30.85
    Sub_Saharan 33.24

    Population
    Ancestral_North_Eurasian 15.93
    Ancestral_South_Eurasian 7.52
    East_Asian 3.81
    West_European_Hunter_Gartherer 6.22
    Natufian 31.84
    Sub_Saharan 34.68

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  16. #9
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    Admix Results (sorted):

    # Population Percent
    1 Sub_Saharan 88.07
    2 Natufian 5.76
    3 Ancestral_North_Eurasian 3.32
    4 East_Asian 2.32
    5 Ancestral_South_Eurasian 0.53

    Single Population Sharing:

    # Population (source) Distance
    1 Hadza 7.37
    2 Mota 7.86
    3 Gambian 11.16
    4 Esan 14.6
    5 Yoruba 14.6
    6 Masai 20.55
    7 Somali 42.57
    8 Moroccan 78.33
    9 Saharawi 79.73
    10 Algerian 81.96
    11 Yemeni 87.8
    12 Libyan 88.39
    13 Egyptian 91.47
    14 GoyetQ116 96.84
    15 BedouinA 97.48
    16 Jordanian 100.25
    17 Syrian 101.19
    18 Palestinian 101.49
    19 Turkmen 103.25
    20 Lebanese 103.48

    Mixed Mode Population Sharing:

    # Primary Population (source) Secondary Population (source) Distance
    1 88.1% Esan + 11.9% Azeri @ 2.04
    2 88.1% Yoruba + 11.9% Azeri @ 2.04
    3 67.3% Hadza + 32.7% Yoruba @ 2.25
    4 67.3% Hadza + 32.7% Esan @ 2.25
    5 88.1% Esan + 11.9% Iranian @ 2.26
    6 88.1% Yoruba + 11.9% Iranian @ 2.26
    7 88.1% Esan + 11.9% Iranian_Mazandarani @ 2.27
    8 88.1% Yoruba + 11.9% Iranian_Mazandarani @ 2.27
    9 88.1% Esan + 11.9% Iran_recent @ 2.27
    10 88.1% Yoruba + 11.9% Iran_recent @ 2.27
    11 87.8% Yoruba + 12.2% Iranian_Shirazi @ 2.31
    12 87.8% Esan + 12.2% Iranian_Shirazi @ 2.31
    13 88.1% Esan + 11.9% Kurd_C @ 2.31
    14 88.1% Yoruba + 11.9% Kurd_C @ 2.31
    15 90.7% Gambian + 9.3% Azeri @ 2.37
    16 88.1% Yoruba + 11.9% Iran_N_WC1 @ 2.4
    17 88.1% Esan + 11.9% Iran_N_WC1 @ 2.4
    18 90.7% Gambian + 9.3% Iranian_Mazandarani @ 2.44
    19 88.3% Yoruba + 11.7% Iran_ChL @ 2.45
    20 88.3% Esan + 11.7% Iran_ChL @ 2.45
    Most likely fit is 4.1% (+- 0.5%) Mideast (various subcontinents)
    and 95.9% (+- 0.5%) Africa (all Bantu)

    most likely at the top
    Bedouin_So= 0.039 Bantu_Keny= 0.961 or
    Egyptian= 0.045 Bantu_Keny= 0.955 or
    Moroccan= 0.049 Bantu_Keny= 0.951 or
    Mozabite= 0.049 Bantu_Keny= 0.951 or
    Bedouin_No= 0.042 Bantu_Keny= 0.958 or
    Palestinia= 0.040 Bantu_Keny= 0.960 or

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    # Population Percent
    1 Sub_Saharan 54.10
    2 Natufian 28.81
    3 Ancestral_North_Eurasian 5.92
    4 West_European_Hunter_Gartherer 4.76
    5 Ancestral_South_Eurasian 4.08
    6 East_Asian 2.34


    Finished reading population data. 136 populations found.
    6 components mode.

    --------------------------------

    Least-squares method.

    Using 1 population approximation:
    1 Somali @ 3.769524
    2 Masai @ 22.276991
    3 Moroccan @ 34.589378
    4 Hadza @ 34.828022
    5 Saharawi @ 35.898506
    6 Mota @ 37.272202
    7 Algerian @ 38.246792
    8 Yemeni @ 42.746281
    9 Libyan @ 43.172455
    10 Egyptian @ 46.118931
    Last edited by drobbah; 02-28-2017 at 10:12 PM.

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