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Thread: The Chinchorro people had additional Caucasoid admixture

  1. #1

    The Chinchorro people had additional Caucasoid admixture

    I have analyzed 10 newly available ancient genomes from the Americas, including a Chinchorro mummy sample.

    From my new post:

    Below are the results of analyses of 10 newly available ancient genomes from the Americas.

    The results for the Chinchorro mummy show that she had a significant amount of Caucasoid admixture beyond what is found in all Amerindians.

    Her amount of the globe4 European component is much larger than the amounts for the other samples.

    She has significantly larger amounts of the globe13 Mediterranean component and the MDLP West-Eurasian, West-European, British, Iberian, Celto-Germanic, North-European-Mesolithic, Atlantic_Mediterranean_Neolithic, West_European_HG, North_West_European, European_Early_Farmers, and European_Hunters_Gatherers components than the other samples.

    Note that the results for the Chinchorro sample cannot be explained as error due to a small number of SNPs, because several of the samples have significantly fewer SNPs than the Chinchorro sample, but they all have much less of the Caucasoid components.

    The results for the Chinchorro sample indicate that the additional Caucasoid admixture in the Chinchorro people was from Neolithic Western Europe. At the time that the Chinchorro woman analyzed here was alive, around 4000 BC, the Megalithic culture was flourishing in Western Europe. Not long after she lived, the Norte Chico civilization was established in Peru, and massive stone structures such as Sechin Bajo began to be constructed in Peru as well.

    In my White Gods post from over two years ago, I included many photographs of Chinchorro mummies, and these photographs show that the Chinchorro people generally had brown or chestnut European hair and European cranial morphology. The DNA analysis results for the Chinchorro sample here confirm that Europeans did indeed make up part of the Chinchorro population.
    Link:

    Analyses of ancient American genomes

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  3. #2
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    MDLP World-22
    62.38% Mesoamerican - Native American component
    18.87% North-Amerind - Native American component
    3.86% Paleo-Siberian - Native American-ish component
    3.57% Austronesian - A little miscellaneous East Eurasian, ok
    3.39% Indo-Tibetan - A little more miscellaneous East Eurasian, only 7% total.
    7.90% Sub-Saharian - The Olmecs waz black yo!

    Bottom line: Not really seeing your point.

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    The results for the Chinchorro sample indicate that the additional Caucasoid admixture in the Chinchorro people was from Neolithic Western Europe.
    Not from Upper Palaeolithic Siberians? (from whom ultimately not just Native Americans, but also Indo-Europeans, derived part of their ancestry):

    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4105016/

    http://anthropogenesis.kinshipstudie...-full-account/

    https://www.academia.edu/7110954/Upp...-_Supplemental

    "(...) This suggests that populations related to contemporary western Eurasians had a more north-easterly distribution 24,000 years ago than commonly thought. Furthermore, we estimate that 14 to 38% of Native American ancestry may originate through gene flow from this ancient population. (...) Gene flow from the MA-1 [Mal'ta] lineage into Native American ancestors could explain why several crania from the First Americans have been reported as bearing morphological characteristics that do not resemble those of east Asians2, 13. Sequencing of another south-central Siberian, Afontova Gora-2 dating to approximately 17,000 years ago14, revealed similar autosomal genetic signatures as MA-1, suggesting that the region was continuously occupied by humans throughout the Last Glacial Maximum. Our findings reveal that western Eurasian genetic signatures in modern-day Native Americans derive not only from post-Columbian admixture, as commonly thought, but also from a mixed ancestry of the First Americans. (...)"


    https://www.youtube.com/watch?v=hF1UO0-cHLs



    At the time that the Chinchorro woman analyzed here was alive, around 4000 BC, the Megalithic culture was flourishing in Western Europe. Not long after she lived, the Norte Chico civilization was established in Peru, and massive stone structures such as Sechin Bajo began to be constructed in Peru as well.
    Sechin Bajo does not resemble anything from Megalithic Western Europe. It more resembles stone structures from the Middle East or Indus Valley.

    Megalithic structures in Western Europe were many times more primitive than Sechin Bajo.

    1) Megalithic structures (example):



    2) Sechin Bajo - reconstruction:

    https://www.google.pl/search?q=Sechi...IVjF0sCh1i3gkj



    Where do you see any similarities between the two, because I don't ???

    Megaliths were just groups of large stones placed by humans into shapes (for example circles), while Sechin Bajo was a building / city.
    Last edited by Tomenable; 07-24-2015 at 02:12 PM.

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  7. #4
    I've now done a K = 4 ADMIXTURE analysis that includes 14 ancient American samples.

    The analysis confirms the additional Caucasoid admixture in the Chinchorro sample detected by the calculators.

    K = 4 admixture analysis of ancient American genomes

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    Interesting results. You ought to run some D stats though.

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    Chinchorro is of especially poor quality. For this reason it didn't go through the same filtering as all the other samples.

    We identified a high amount of alignment errors for sequences shorter
    than 30 bp and filtered the realigned alignments for these. The exception to this was the
    Chinchorro sample that had a comparatively short read length distribution (25-30 bp) and
    filtering out <30 bp reads would decrease the read depth substantially. Hence, to retain as
    many of the reads while ensuring accurate mapping (i.e. avoiding spurious mapping of
    short reads), we avoided filtering by read length and instead used the –i option in BWA
    while mapping to disallow indels.
    Even if some of the ancient samples have less overlapping SNP's, it's Chinchorro that should be analyzed with the most caution. Other things they mention about it are that it also had the lowest endogenous percentage (0.08 while others ranged from 0.1 to 23.8) and an average read depth of 0.01.
    Last edited by Shaikorth; 07-24-2015 at 09:19 PM.

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    Why are you guys thanking his posts?

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  14. #8
    Quote Originally Posted by Kale View Post
    The Olmecs waz black yo!
    The Olmecs as a whole were of course not Negroid. But the Olmec colossal heads are obviously Negroid. They look just like West African Negroes.

  15. #9
    Quote Originally Posted by Tomenable View Post
    Not from Upper Palaeolithic Siberians?
    Obviously not, because of the Mediterranean components.

    Quote Originally Posted by Tomenable View Post
    Megalithic structures in Western Europe were many times more primitive than Sechin Bajo.
    There are more impressive Megalithic structures in Western Europe than what you showed. For example Barnenez, dated to 4850 BC, and Newgrange, dated to 3200 BC.

    The Amerindians venerated the Europeans who came to ancient Peru as civilization-creating gods (Viracochas, with Kon-Tiki Viracocha as the supreme deity of ancient Peru). They provided a large labor force to the European elite for the construction of structures like Sechin Bajo. There was no such large, worshipful labor force in Neolithic Western Europe, so architecture there didn't rise to the heights that it did in ancient Peru.

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    That's too noisy. Anytime you see over 1% SSA, you may as well toss the sample.

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