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Thread: Basal Eurasian from Eastern Arabia?

  1. #1
    Advisor Angela's Avatar
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    4 members found this post helpful.

    Basal Eurasian from Eastern Arabia?

    Lazaridis seems to think so; he called the post Basal Eurasian Friday! :)

    See:
    https://www.biorxiv.org/content/10.1101/2021.02.24.432678v1

    Projecting ancient ancestry in modern-day Arabians and Iranians: a key role of the past exposed Arabo-Persian Gulf on human migrations

    Joana C. Ferreira, Farida Alshamali, Francesco Montinaro, Bruno Cavadas, Antonio Torroni, Luisa Pereira, Alessandro Raveane, View ORCID ProfileVeronica Fernandes



    "Arabian Peninsula is strategic for investigations centred on the structuring of the modern human population in the three main groups, in the awake of the out-of-Africa migration. Despite the poor climatic conditions for recovery of ancient DNA human evidence in Arabia, the availability of genomic data from neighbouring ancient specimens and of informative statistical tools allow better modelling the ancestry of these populations. We applied this approach to a dataset of 741,000 variants screened in 291 Arabians and 78 Iranians, and obtained insightful evidence. The west-east axis was a strong forcer of population structure in the Peninsula, and, more importantly, there were clear continuums throughout time linking west Arabia with Levant, and east Arabia with Iran and Caucasus. East Arabians also displayed the highest levels of the basal Eurasian lineage of all tested modern-day populations, a signal that was maintained even after correcting for possible bias due to recent sub-Saharan African input in their genomes. Not surprisingly, east Arabians were also the ones with higher similarity with Iberomaurusians, who were so far the best proxy for the basal Eurasians amongst the known ancient specimens. The basal Eurasian lineage is the signature of ancient non-Africans that diverged from the common European-East Asian pool before 50 thousand years ago, and before the later interbred with Neanderthals. Our results are strong evidence to include the exposed basin of the Arabo-Persian Gulf as possible home of basal Eurasians, to be investigated further on namely by searching ancient Arabian human specimens."

    Well, I used to say Persian Gulf, maybe on the submerged lands there, so maybe I got it part right.


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    Regular Member Regio X's Avatar
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    1 members found this post helpful.
    @Angela
    Check this out.

    Lost Civilization May Have Existed Beneath the Persian Gulf
    https://www.livescience.com/10340-lo...sian-gulf.html

  3. #3
    Advisor Angela's Avatar
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    Quote Originally Posted by Regio X View Post
    @Angela
    Check this out.
    Lost Civilization May Have Existed Beneath the Persian Gulf
    https://www.livescience.com/10340-lo...sian-gulf.html
    Thanks, Regio, that's what I was remembering. It would have been an area perfectly placed to be out of the "traffic" of middle Eurasia, but close to both Mesopotamia and then the Levant and western Anatolia, and to the Zagros Mountains and Western Anatolian and Iran.

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    yes, the perfect refuge already inhabited by modern humans 125 ka, maybe by basal eurasians
    but because it is so perfect, I would be very surprised if not other modern humans arrived there later, with Neanderthal admixture
    and that present day populations in that area have a bit more basal eaurasian than average is not because some HG from this refuge might have survived till today
    it is because of arrivals of farmers and herders and bronze age people coming from the north into the area
    after LGM, the highest concentraton in Basal Eurasian we know of was south of the Caucasus or northern Iran

  5. #5
    Regular Member kingjohn's Avatar
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    speaking of basal euroasian i try today the calculator k5 admixture from gene plazza by kurd ( 9 euro)The Eurasia K5 admixture calculator was specifically designed to measure relatedness of individuals to highly diverged populations of Eurasia, to wit:
    1. West Eurasians
    2. South Eurasians
    3. East Eurasians
    4. Eastern Siberians & Native Americans
    5. Basal Eurasians & Africans

    Differences between the Eurasia K5, commercial ancestry tests, and other Admixture program based calculators:In contrast to commercial ancestry tests and other Admixture program based calculators, the Eurasia K5 is designed to detect TOTAL DEEPER RELATEDNESS between the test subject and the aforementioned divergent populations than other tests.Commercial DNA ancestry tests can detect East or South Asian ancestry in Europeans or West Asians only if there is recent admixture, however they are not designed to find older such ancestry that may have introgressed during Medieval, Iron Age, Bronze Age, or Neolithic times. Similarly other Admixture program based calculators do the same. The reason for this is that a test subject's DNA is compared to many other West Asian or European populations and many South or East Asian DNA segments go unreported because they are incorporated into the West Asian or European references via older admixture from Iron Age Steppe nomads or Turkic migrations into West Asia and Europe. In other words these older East or South Asian DNA segments are not reported under East or South Asian in the test subject's test results. This calculator seeks to find those older East Eurasian, South Eurasian, Siberian, and Basal Eurasian/African segments in the user's DNA.Similarly, this test also seeks to find older West Eurasian, Siberian, and Basal Eurasian DNA segments in East Asian users. Ditto for testers from the Americas and Africa.In "Paleolithic DNA from the Caucasus reveals core of West Eurasian ancestry", Supplementary Information, Tables S4.2-S4.5, Lazaridis et al, 2018, the authors showed via formal statistics that most West Asian and European populations including ancient ones have some older East Asian and Siberian related admixture. The Eurasia K5 test is also able to detect this older admixture unlike commercial ancestry testing companies such as 23andMe or AncestryDNA, and unlike most other Admixture based calculators.my results :https://i.imgur.com/rfh52rY.png
    Last edited by kingjohn; 04-03-21 at 18:59.
    https://www.yfull.com/live/tree/E-Y62418/

    https://yfull.com/mtree/H3ap/

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