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Thread: Genomic Insights into the Formation of Human Populations in East Asia[

  1. #31
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    The Reich Lab looks like it has quite a few samples from the Baraba steppe.

    Ancient_Samples_Reich_Lab.jpg

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  3. #32
    I'm more interested in the Lower Mesopotamian samples.

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  5. #33
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    Quote Originally Posted by Adules View Post
    I'm more interested in the Lower Mesopotamian samples.
    No I think we need more samples from Siberia.

    /s

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  7. #34
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    However, West Liao River farmers do appear to be an excellent candidate for the primary source population for present-day Korean and Japanese people.
    I think the author underestimated the split time between Korean-Japanese and the mainland people.

    O1b-P49 is a characteristic Y haplogroup in Korea-Japan,TMRCA~20kya,They may have entered the Korean peninsula from a land bridge during the ice age.But Hongshan culture formed six thousand years ago(West Liao River),the most haplotypes are y-N, which is minor in Korea-Japan.In genome PCA of other studys, Korean-Japanese is separated from other east asians.

    Refer to other paper (Genomic Insights into the Demographic History of Southern Chinese ) Fig3C-Coalescent analysis using SFS of rare alleles to calibrate the time of the major splits in East Asians.The Inland Southern East Asian split from Coastal east asian about 16kya, I think the same method could be used to estimate the split time between K-J and the mainland people.
    Last edited by Howard23; 02-25-2021 at 05:27 AM.

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  9. #35
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    Quote Originally Posted by Howard23 View Post
    I think the author underestimated the split time between Korean-Japanese and the mainland people.

    O1b-P49 is a characteristic Y haplogroup in Korea-Japan,TMRCA~20kya,They may have entered the Korean peninsula from a land bridge during the ice age.But Hongshan culture formed six thousand years ago(West Liao River),the most haplotypes are y-N, which is minor in Korea-Japan.In genome PCA of other studys, Korean-Japanese is separated from other east asians.

    Refer to other paper (Genomic Insights into the Demographic History of Southern Chinese ) Fig3C-Coalescent analysis using SFS of rare alleles to calibrate the time of the major splits in East Asians.The Inland Southern East Asian split from Coastal east asian about 16kya, I think the same method could be used to estimate the split time between K-J and the mainland people.
    The more studies of ancient DNA appear, the more it becomes clear that Y-DNA lines usually carry only a small signal from their original population. In general, the Y-DNA lines, when they arrive at a new location, enter the autosomal landscape that already exists at that location, bringing, as a rule, a small percentage of their original autosomal profile to it. Multiple migrations through a certain area of different Y-DNA lines can eventually lead to a significant change in the autosomal profile of this area, but this process is very slow. Due to the small amount of ancient DNA at the moment, it is usually impossible to say which Y-DNA formed a particular autosomal profile in a particular area.

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  11. #36
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    Quote Originally Posted by VladimirTaraskin View Post
    The more studies of ancient DNA appear, the more it becomes clear that Y-DNA lines usually carry only a small signal from their original population. In general, the Y-DNA lines, when they arrive at a new location, enter the autosomal landscape that already exists at that location, bringing, as a rule, a small percentage of their original autosomal profile to it. Multiple migrations through a certain area of different Y-DNA lines can eventually lead to a significant change in the autosomal profile of this area, but this process is very slow. Due to the small amount of ancient DNA at the moment, it is usually impossible to say which Y-DNA formed a particular autosomal profile in a particular area.
    However, considering the homogeneity of East Asian's auDNA, it is not easy to detect any difference from auDNA even if there is a population replacement. Therefore, it is necessary to study the Y and mtDNA. O1b-P49 is a strong population in Korea and Japan.

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  13. #37
    Quote Originally Posted by Howard23 View Post
    ....But Hongshan culture formed six thousand years ago(West Liao River),the most haplotypes are y-N, which is minor in Korea-Japan....
    People after Hongshan do not have the same Y-chromosome profiles.

    Anyway this paper says Tianyuan was East Asian, not basal East Eurasian.
    In fact he was a purer East Asian than modern East Asians in that he had no Andaman like component.
    This paper did not analyze Oceanians or Anicient Ancestral South Asians but it appears that Onge and Andaman_HG fall on the Asian side rather than Oceanian side in the phylogeny of East Eurasians.

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  15. #38
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    Anything here that we didn't already know?

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    Let's begin with the oldest samples (Mongolia_Neolithic_North). There are four male samples here (I13698, I11696, I11697 and I11698), and all four are from the same tomb, with the later three being labeled as 2nd or 3rd degree relatives. All four belong to the same rare subclade F17066>F25764, which is parallel to the much more numerous and widespread F1756. These samples actually split clade F25764, with 3 derived and 4 ancestral SNPs (of the total 9 SNPs at this level). Note that clades F17066 and F25764 don't exist on YFull yet, so I'm using FTDNA public Y-DNA-haplotree.


    I13698, I11696, I11697 and I11698; 5632-5491 BC*; Marzyn khutul, Tomb 1-055-1, Khutag-Undur sum, Bulgan aimag, Mongolia; Mongolia_Neolithic_North; C2b1a1-F3918>F11350/YP5260>F17066>pre-F25764


    C-F25764.PNG

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  19. #40
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    Is there some particular reason as to why we don't have any aDNA from the Korean peninsula? Obviously, North Korea isn't really an option, but you'd figure that we would have at least a couple of samples from South Korea at this point.

    Hate to assume the worst, but I always thought it was some politically-driven nonsense that forbids collaboration with labs in Japan and China...

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