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Thread: Teal discovered ??!!

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    Teal discovered ??!!

    Late Palaeolithic DNA from Georgian specimens sampled by the Dublin team has found the "Teal" that we have been looking for. ?

    http://m.phys.org/news/2015-11-fourt...gatherers.html

    Davidksi states on his blog that the full paper might be coming out later today !

    -> full paper http://www.nature.com/ncomms/2015/15...comms9912.html


    However, the sequencing of ancient DNA recovered from two separate burials in Western Georgia - one over 13,000 years old, the other almost 10,000 years old - has enabled scientists to reveal that the Yamnaya owed half their ancestry to previously unknown and genetically distinct hunter-gatherer sources: the fourth strand.

    By reading the DNA, the researchers were able to show that the lineage of this fourth Caucasus hunter-gatherer strand diverged from the western hunter-gatherers just after the expansion of anatomically modern humans into Europe from Africa.

    The Caucasus hunter-gatherer genome showed a continued mixture with the ancestors of the early farmers in the Levant area, which Manica says makes sense given the relative proximity. This ends, however, around 25,000 years ago - just before the time of the last glacial maximum, or peak Ice Age.

    At this point, Caucasus hunter-gatherer populations shrink as the genes homogenise, a sign of breeding between those with increasingly similar DNA. This doesn't change for thousands of years as these populations remain in apparent isolation in the shelter of the mountains - possibly cut off from other major ancestral populations for as long as 15,000 years - until migrations began again as the Glacial Maximum recedes, and the Yamnaya culture ultimately emerges.


    "We knew that the Yamnaya had this big genetic component that we couldn't place, and we can now see it was this ancient lineage hiding in the Caucasus during the last Ice Age," said Manica.

    While the Caucasus hunter-gatherer ancestry would eventually be carried west by the Yamnaya, the researchers found it also had a significant influence further east. A similar population must have migrated into South Asia at some point, says Eppie Jones, a PhD student from Trinity College who is the first author of the paper.

    "India is a complete mix of Asian and European genetic components. The Caucasus hunter-gatherer ancestry is the best match we've found for the European genetic component found right across modern Indian populations," Jones said. Researchers say this strand of ancestry may have flowed into the region with the bringers of Indo-Aryan languages.

    The widespread nature of the Caucasus hunter-gatherer ancestry following its long isolation makes sense geographically, says Professor Ron Pinhasi, a lead senior author from University College Dublin. "The Caucasus region sits almost at a crossroads of the Eurasian landmass, with arguably the most sensible migration routes both west and east in the vicinity

    ADD: the full paper is now out http://www.nature.com/ncomms/2015/15...comms9912.html
    Last edited by Gravetto-Danubian; 11-16-2015 at 12:49 PM.

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    It is also interesting to note that they argue that it is this distinct branch which contributed to modern Indo Aryans. One wonders how Far East this Group had extended before the Bronze Age

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    Quote Originally Posted by Gravetto-Danubian View Post
    It is also interesting to note that they argue that it is this distinct branch which contributed to modern Indo Aryans. One wonders how Far East this Group had extended before the Bronze Age
    It might have first expanded with proto-Dravidians from Iran, and then again from the steppe with the Indo-Aryans.

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    Good to see folks at UCD (University College Dublin) and TCD (Trinity College Dublin -- oldest university in Ireland) involved in this. Bradley has mentioned in his talk in Dublin (or so I hear) that he had multiple samples from Mesolithic/BA/IA from Ireland so hopefully we'll see paper from them soon as well.
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    Quote Originally Posted by Generalissimo View Post
    It might have first expanded with proto-Dravidians from Iran, and then again from the steppe with the Indo-Aryans.
    I think we will find out very soon

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    So, teal farmers were actually local Caucasian isolated hunters... Is there any other way to interpret this?

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    Quote Originally Posted by parastais View Post
    So, teal farmers were actually local Caucasian isolated hunters... Is there any other way to interpret this?
    Well they were hunters in the Palaeolithic, yes. By the Copper Age, the south Caucasus had a very diverse economy consisting of both Pastoral and farming elements. People often erroneously think anything south of the caucuses is automatically and exclusively "farming". This is incorrect

    This population then moved to the north caucuses circa 4200 BC – the start of the pre-Majkop phase, and then gradually mixed with the EHG groups between 4000-3000 BC.
    Last edited by Gravetto-Danubian; 11-16-2015 at 11:57 AM.

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    Quote Originally Posted by Dubhthach View Post
    Good to see folks at UCD (University College Dublin) and TCD (Trinity College Dublin -- oldest university in Ireland) involved in this. Bradley has mentioned in his talk in Dublin (or so I hear) that he had multiple samples from Mesolithic/BA/IA from Ireland so hopefully we'll see paper from them soon as well.
    This is a joint project between TCD (Bradley) and UCD (Pinhasy).

    They have nearly 1,000 ancient DNA samples many from the Hungarian Plain and about 20 from Ireland.

    https://www.pinterest.com/gerardcorcoran/ancient-dna/

    "Professor Bradley, leader of the Trinity team, said: "This is a major new piece in the human ancestry jigsaw, the influence of which is now present within almost all populations from the European continent and many beyond."

    "The sequencing of genomes from this key region will have a major impact on the fields of palaeogeneomics and human evolution in Eurasia, as it bridges a major geographic gap in our knowledge," added Professor Ron Pinhasi, University College Dublin."

    http://www.eurekalert.org/pub_releas...-sfi111315.php
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    The paper is out now and free to view

    http://www.nature.com/ncomms/2015/15...comms9912.html

    Happy reading !
    Last edited by Gravetto-Danubian; 11-16-2015 at 12:18 PM.

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    Quote Originally Posted by Heber View Post
    This is a joint project between TCD (Bradley) and UCD (Pinhasy).

    They have nearly 1,000 ancient DNA samples many from the Hungarian Plain and about 20 from Ireland.

    https://www.pinterest.com/gerardcorcoran/ancient-dna/

    "Professor Bradley, leader of the Trinity team, said: "This is a major new piece in the human ancestry jigsaw, the influence of which is now present within almost all populations from the European continent and many beyond."

    "The sequencing of genomes from this key region will have a major impact on the fields of palaeogeneomics and human evolution in Eurasia, as it bridges a major geographic gap in our knowledge," added Professor Ron Pinhasi, University College Dublin."

    http://www.eurekalert.org/pub_releas...-sfi111315.php
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