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Thread: Genetic Genealogy & Ancient DNA in the News (DISCUSSION ONLY)

  1. #4611
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    Quote Originally Posted by alan View Post
    ... So, a significantly larger input from northern France and the more SW part of the Low Countries is expected in southern an SE England in that era than in Scotland...
    Don't you think that if there were (genetic) contacts between southern England and northern France / Low Countries during the period of time you mention (the early BA), that gene flow would go undetected? I'd have thought the autosomal make-up on both sides of the Channel / North Sea would have been largely identical at the time. In fact I suspect it remained so until much more recent times.

    In other words, if the scientists detect sudden increases in farmer ancestry at certain points in time, that ancestry has to come from areas further 'south', where the autosomal mix becomes distinguishable from that of coastal populations. Perhaps not that far south, but far enough to still leave an imprint once mixed with the original British mix.
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    ___ Paper trail since 1550 : 100% South Auvergne, France ___
    Distance: 1.510% : 50.0 German , 50.0 Spanish Castilla .... Distance: 1.453% : 50.4 Swiss German , 49.6 Spanish Barcelona
    Distance: 1.659% : 50.2 Scottish , 49.8 French Corsica...... Distance: 1.714% : 50.8 Italian Lombardy , 49.2 French Brittany
    Distance: 1.959% : 50.8 Irish , 49.2 Italian Tuscany ......... Distance: 2.189% : 50.8 Dutch , 49.2 Basque French

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  3. #4612
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    A 1,600-year-old burial ground discovered in Eastern Bohemia is shedding new light on that era. The site was discovered in 2019 by archaeologists from the Museum of Eastern Bohemia in Hradec Králové (MVČ HK), and the first findings were just made public.



    The site has been dated to the fifth century AD, around the time of the collapse of the western part of the Roman Empire and the start of the Dark Ages. The era was known for migration and instability.

    Radiocarbon dating of the remains should provide a more accurate timing of the graves. An analysis of the carbon and nitrogen isotopes will help determine what the dominant source of protein for each individual was, and whether the diet changed over time. Changes in the ratio of different oxygen isotopes can also show whether the people moved from areas with different levels of precipitation.

    DNA analysis is currently taking place in cooperation with the Max Planck Institute in Leipzig and the Institute of Archeology and Museology of Masaryk University. This could show more about the relationships between the people and where they came from.

    https://www.expats.cz/czech-news/art...ropean-history
    Last edited by Waldemar; 03-07-2021 at 09:34 AM.

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  5. #4613
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    Quote Originally Posted by Waldemar View Post
    A 1,600-year-old burial ground discovered in Eastern Bohemia is shedding new light on that era. The site was discovered in 2019 by archaeologists from the Museum of Eastern Bohemia in Hradec Králové (MVČ HK), and the first findings were just made public.



    The site has been dated to the fifth century AD, around the time of the collapse of the western part of the Roman Empire and the start of the Dark Ages. The era was known for migration and instability.

    Radiocarbon dating of the remains should provide a more accurate timing of the graves. An analysis of the carbon and nitrogen isotopes will help determine what the dominant source of protein for each individual was, and whether the diet changed over time. Changes in the ratio of different oxygen isotopes can also show whether the people moved from areas with different levels of precipitation.

    DNA analysis is currently taking place in cooperation with the Max Planck Institute in Leipzig and the Institute of Archeology and Museology of Masaryk University. This could show more about the relationships between the people and where they came from.

    https://www.expats.cz/czech-news/art...ropean-history
    Only 1 remain is being analyzed? Unless I'm reading it wrong. All the other graves were looted and the grave remains of 1 woman was found. It was assumed a man was in grave 3 based on the burial items. Though, the article does mention remains of a older man and child grave found in the 60s. Not sure if those are being analyzed.

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    Quote Originally Posted by pmokeefe View Post
    New insights into the fine-scale history of western–eastern admixture of the northwestern Chinese population in the Hexi Corridor via genome-wide genetic legacy
    Hongbin Yao, Mengge Wang, Xing Zou, Yingxiang Li, Xiaomin Yang, Ailin Li, Hui-Yuan Yeh, Peixin Wang, Zheng Wang, Jingya Bai, Jianxin Guo, Jinwen Chen, Xiao Ding, Yan Zhang, Baoquan Lin, Chuan-Chao Wang & Guanglin He

    Abstract
    Trans-Eurasian cultural and genetic exchanges have significantly influenced the demographic dynamics of Eurasian populations. The Hexi Corridor, located along the southeastern edge of the Eurasian steppe, served as an important passage of the ancient Silk Road in Northwest China and intensified the transcontinental exchange and interaction between populations on the Central Plain and in Western Eurasia. Historical and archeological records indicate that the Western Eurasian cultural elements were largely brought into North China via this geographical corridor, but there is debate on the extent to which the spread of barley/wheat agriculture into North China and subsequent Bronze Age cultural and technological mixture/shifts were achieved by the movement of people or dissemination of ideas. Here, we presented higher-resolution genome-wide autosomal and uniparental Y/mtDNA SNP or STR data for 599 northwestern Han Chinese individuals and conducted 2 different comprehensive genetic studies among Neolithic-to-present-day Eurasians. Genetic studies based on lower-resolution STR markers via PCA, STRUCTURE, and phylogenetic trees showed that northwestern Han Chinese individuals had increased genetic homogeneity relative to northern Mongolic/Turkic/Tungusic speakers and Tibeto-Burman groups. The genomic signature constructed based on modern/ancient DNA further illustrated that the primary ancestry of the northwestern Han was derived from northern millet farmer ancestors, which was consistent with the hypothesis of Han origin in North China and more recent northwestward population expansion. This was subsequently confirmed via excess shared derived alleles in f3/f4 statistical analyses and by more northern East Asian-related ancestry in the qpAdm/qpGraph models. Interestingly, we identified one western Eurasian admixture signature that was present in northwestern Han but absent from southern Han, with an admixture time dated to approximately 1000 CE (Tang and Song dynasties). Generally, we provided supporting evidence that historic Trans-Eurasian communication was primarily maintained through population movement, not simply cultural diffusion. The observed population dynamics in northwestern Han Chinese not only support the North China origin hypothesis but also reflect the multiple sources of the genetic diversity observed in this population.
    Table S9 has mtDNA and Y-DNA data for 49 Han Chinese males from Lanzhou, Gansu:

    Lanzhou Han mtDNA
    1/49 A15a
    1/49 A17
    1/49 A18
    1/49 B4b1b
    1/49 B4c1a
    1/49 B4c1b2a
    1/49 B4d1
    1/49 C4a1
    2/49 D4
    1/49 D4a
    2/49 D4b2b
    1/49 D4b2b2
    1/49 D4b2b6
    2/49 D4e1a
    1/49 D4e5b
    1/49 D4g
    2/49 D4j
    1/49 D4o2
    2/49 D5a2a1
    2/49 F1a
    3/49 F1a1
    1/49 F1d
    1/49 F2
    1/49 F2d
    1/49 F3a1
    1/49 F4a1a
    2/49 G1c
    1/49 G2a
    1/49 M10a1a
    1/49 M71a1
    1/49 M7b1a1h
    2/49 M8a2
    2/49 M8a2a
    2/49 M9a1a1c1a
    1/49 R11a
    2/49 Y1b1

    Lanzhou Han Y-DNA
    1/49 C2b1a2a2a~
    1/49 C2b1a3
    2/49 C2c1a1a1a
    1/49 C2c1a1b~
    1/49 C2c1a2a2
    2/49 D1a1a1a1a2a~
    1/49 N1a1a1a1a3a2a~
    3/49 N1a2a1a~
    1/49 N1b2a2~
    1/49 O1a1a1a1a1a1a1
    1/49 O1a1a1a1a2
    1/49 O1a1a1b2
    1/49 O1a2
    1/49 O1b1a1a1a1b1a1
    2/49 O1b1a1a1b2
    1/49 O2a1a1a1b1
    1/49 O2a1c1a1a1a1a1a1b
    1/49 O2a1c1a1a1a1e1
    1/49 O2a1c1a1a1a1g
    1/49 O2a1c1a1a1a1h
    1/49 O2a1c1a2a1
    1/49 O2a1c1a2a1a1
    1/49 O2a1c2
    1/49 O2a2a1a2a1a3
    1/49 O2a2b1a1a7a
    3/49 O2a2b1a2a1a3b
    1/49 O2a2b1a2a1a3b2b1
    2/49 O2a2b1a2a1a3b2b2
    1/49 O2a2b1a2a1d1
    1/49 O2a2b1a2b1a2
    1/49 O2a2b1a2b2
    1/49 O2a2b2a1a
    1/49 O2a2b2a1b
    1/49 O2a2b2a2a
    1/49 O2a2b2b1b
    4/49 Q1a1a1a1a~
    1/49 R1a1a1b2
    1/49 R2a2

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  9. #4615
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    Quote Originally Posted by pmokeefe View Post
    Population dynamics in the Japanese Archipelago since the Pleistocene
    Fuzuki Mizuno, Jun Gojobori, Masahiko Kumagai, Hisao Baba, Yasuhiro Taniguchi, Osamu Kondo, Masami Matsushita, Takayuki Matsushita, Fumihiko Matsuda, Koichiro Higasa, Michiko Hayashi, Li Wang, Kunihiko Kurosaki, Shintaroh Ueda
    Abstract
    The Japanese Archipelago is widely covered with acidic soil made of volcanic ash, an environment which
    is detrimental to the preservation of ancient biomolecules. More than 10,000 Palaeolithic and Neolithic
    sites have been discovered nationwide, but few skeletal remains exist and preservation of DNA is poor.
    Despite these challenging circumstances, we succeeded in obtaining a complete mitogenome sequence
    from Palaeolithic human remains. We also obtained those of Neolithic (hunting-gathering Jomon and the
    farming Yayoi cultures) remains, and over 2,000 present-day Japanese. The Palaeolithic mitogenome is
    potentially an ancestral type of haplogroup M, suggesting it is not only connected to present-day
    Japanese but also present-day East Asians. There were no changes in the gene pool from the huntinggathering
    (Jomon) to the farming cultures (Yayoi), and this is different from in Europe, where there was
    no genetic continuity between hunter-gatherers and farmers. We also found that a vast increase of
    population size happened and has continued since the Yayoi period, characterized with paddy rice
    farming. It means that the cultural transition, i.e. rice agriculture, had signi��cant impact on the
    demographic history of Japanese population.
    Perhaps Western labs will have more luck with autosomal retrieval in these samples.
    Ελευθερία ή θάνατος.

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    There were no changes in the gene pool from the huntinggathering (Jomon) to the farming cultures (Yayoi), and this is different from in Europe, where there was no genetic continuity between hunter-gatherers and farmers.
    This seems highly unlikely. Supplementary info isn't out yet though.

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    Quote Originally Posted by Megalophias View Post
    This seems highly unlikely. Supplementary info isn't out yet though.
    Yeah, that was a weird comment. I guess they're basing that on mitogenomes, which is the only new data they have. But surely they're familiar with the Jomon whole genomes and how different they are from the ancient mainland East Asians that must have been ancestral to Yayoi and the bulk of modern Japanese.
    Ελευθερία ή θάνατος.

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    Quote Originally Posted by Michalis Moriopoulos View Post
    Yeah, that was a weird comment. I guess they're basing that on mitogenomes, which is the only new data they have. But surely they're familiar with the Jomon whole genomes and how different they are from the ancient mainland East Asians that must have been ancestral to Yayoi and the bulk of modern Japanese.
    This is only one of many recent papers that make no mention of other work in their area that is somewhat contradictory.
    It is by no means universal.
    But the vibe I had from fellow researchers (although I did not go far with mine) was that this practice merited public ridicule.
    Reading papers over the years I have seen how competing strands of evidence lead to greater and richer truths.

    So I hope they come back with another paper, maybe on autosomal for these remains, and discuss all of the work currently available.

  16. #4619
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    Quote Originally Posted by Michalis Moriopoulos View Post
    Yeah, that was a weird comment. I guess they're basing that on mitogenomes, which is the only new data they have. But surely they're familiar with the Jomon whole genomes and how different they are from the ancient mainland East Asians that must have been ancestral to Yayoi and the bulk of modern Japanese.
    Perhaps they mean that some Japanese and recent Yayoi-Jomon descendants have/had paternal Yayoi ancestry but maternal Jomon ancestry hence the similarity.

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  18. #4620
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    No idea what kind of data they are basing such a comment on. The overwhelming majority of published papers, including ones from Japan, model modern Japanese as being of mostly mainland non-Jomon ancestry. The situation, in fact, seems to mirror exactly what happened in Europe during the Neolithic.

     




    The table is from the "Genomic Insights into the Formation of Human Populations in East Asia".

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