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Thread: Jomon study - April 2019

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    Jomon study - April 2019

    i haven't fully read it yet, but i will later.. but tell us your thoughts etc!....

    https://www.jstage.jst.go.jp/article.../_pdf/-char/en

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     Milkyway (10-05-2019)

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    This is very interesting. It has been proposed that the Jomon may be descendants of the first peoples that arrived in Japan more than 35,000 YBP.

    Genetic uniqueness of Funadomari Jomons
    When worldwide populations were compared with F23 using PCA, Funadomari Jomons were closer to East Eurasians than to Africans, Europeans, Sahulians, and Native Americans (Figure 8a), consistent with the previously reported Sanganji Jomon genome (Kanzawa-Kiriyama et al., 2017). Next, comparison with East Asians showed that Funadomari Jomons were distinct from other modern East Eurasians. Modern Japanese individuals were situated between Jomons (Funadomari, Sanganji, and Ikawazu) and continental Northeast Eurasians (CHB, Naxi, and Yi; Figure 8b). The four Jomon individuals clustered tightly.

    We then investigated the phylogenetic relationships between F23 and modern and other ancient human populations using pairwise Fst distances with the neighbor-joining method (Supplementary Figure 11). After the split with Papuans, F23 appeared basal to other South and East Asians, including Native Americans, consistent with the previous observation in Sanganji Jomon (Kanzawa-Kiriyama et al., 2017).
    Ancestral makeup of modern Japanese Archipelago populations
    Comparison of two Jomons, F23 and IK002, with worldwide populations using f4-statistics suggested that the two Jomons were equally distant to other populations, except for Ainu, who are significantly closer to F23 (Supplementary Tables 35 and 36). Then, we compared F23 with three Japanese populations (Ainu, Mainland Japanese, and Ryukyuan) and other East Eurasians using PCA, and showed that while the Ainu were genetically closest to F23, they did not exactly cluster together (Figure 12, Supplementary Figures 22 and 23). Phylogenetic trees demonstrated that F23 and Ainu form a clade located outside the East Asian cluster (Supplementary Figures 24a and 25a), or inside the cluster in which Japanese and Ryukyuan pull the clade (Supplementary Figures 24b and 25b, c). We then used admixture f3-statistics to identify other populations that may have contributed to the genetic ancestry of the Ainu. Using F23 as a source population, we found that Siberian populations, particularly Koryak and Itel’men, showed negative f3-values with significant Z-scores (Z < –3), suggesting that they had some genetic contributions in the formation of the Ainu (Supplementary Figure 26, Supplementary Table 37).
    Last edited by Milkyway; 10-05-2019 at 10:22 AM.

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