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Thread: Genetic Genealogy & Ancient DNA in the News (TITLES/ABSTRACTS ONLY)

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    Deep genetic differences between neighbouring populations in 2nd century AD Poland?

    From Polishgenes blog:

    "Hints of deep genetic substructure in Iron Age Poland:

    The DNA of individuals from two early Roman-Period populations of Linowo and Rogowo was analysed. The distribution of three mutations varied significantly when compared to the modern Polish population. The TAFT analysis suggests that the decreased frequency of SLC11A1 D543N in modern Poles as compared to 2nd century Linowo samples is the result of non-stochastic mechanisms, such as purifying or balancing selection. The disparity in frequency of other mutations is most likely the result of genetic drift, an evolutionary force which is remarkably amplified in low-size groups. Together with the FST analysis, mtDNA haplotypes' distribution and deviation from the Hardy-Weinberg equilibrium, we suggest that the two populations were not interbreeding (despite the close proximity between them), but rather inbreeding, the results of which are particularly pronounced among Rogowo habitants.

    Although no sound evidence of population differentiation was found when comparing the samples of Linowo and Rogowo, it is worth noticing that the distribution of mtDNA haplotypes between these two settlements differs remarkably. Apart from the two haplotypes (rCRS and 16126C) that occur in both studied groups, no other pattern of mtDNA SNPs is shared between them. The lack of reflection of these dissimilarities in the FST analysis is probably a result of the low-size group which is more exposed to result bias or low diversity of haplotypes among Rogowo individuals. All of the above allows to draw the theoretical conclusion that although these two settlements date back to the same period and are located within 55 km (or around 160 km along the Vistula River) of one another, they are genetically remote."

    Link:

    http://polishgenes.blogspot.com/2017...ucture-in.html

    It seems that one of those populations (probably Rogowo) were Goths?
    Last edited by Tomenable; 03-29-2017 at 12:33 PM.

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    More about Rogowo - https://www.researchgate.net/publication/23...ming_Estimation, https://www.researchgate.net/publication/25...lation_2nd_c_AD

    "From the comparison of different Wielbark samples from Polish territories, the stature of the Rogowo people appears to be above average (Kozak-Zychman, 1996). The mean age at death for Wielbark populations ranges from 28.5 to 40.5 years, and Rogowo individuals died at 36.6. years of age on average (Piontek, 2006); thus, they seem to have lived relatively long (...) Diet at Rogowo was based on terrestrial foods (meat, milk, and plants), but with supplemental input from fish, indicating an overall broad-spectrum subsistence economy. Millet was consumed at Rogowo, and in greater amounts than during the medieval period to follow. Stable isotope differences between the sexes indicate that men and women may have consumed different foods, although there is a possibility that women migrated to Rogowo from an isotopically different region of Europe."


    https://www.ncbi.nlm.nih.gov/pmc/art...e.0122384.s003
    Last edited by Waldemar; 03-29-2017 at 01:29 PM.

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    Nevgen has a problem with GATAH and DYS389II input, check the numbers under the chart

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    A MEDIEVAL ringfort that included a jewellery workshop and extensive farming has been uncovered in a surprise archaeological find during a road project in Co Roscommon.

    But it will take the outcome of scientific analysis on the almost 800 people whose remains were found in the excavation to reveal the complete story of the ringfort.
    ....
    The understanding from evidence gathered to date is that, while the original family may have moved out and built other ringforts nearby as it expanded over several hundred years, the main enclosure continued to be used for burials.

    The DNA testing and other analysis of the human remains should also clarify the timeline of the ringfort’s use, but it appears that it was occupied during early Christianity period.

    A monastery was founded in Roscommon by St Comán in the early 500s, and had become quite important by the eighth century.

    A feature in a number of graves in the burial ground excavated for TII was the placement of items with the body, in many cases apparently hidden under the hair. The artifacts found in such positions included beads, blades, a bracelet fragment, and copper and bone pins.

    As a generally non-Christian tradition, this may suggest these burials were quite early.

    “Local society was still finding it difficult to let go of older pre-Christian customs,” suggested excavation director Shane Delaney.
    ...





    http://www.irishexaminer.com/viewpoi...ig-446670.html
    Last edited by Dubhthach; 04-02-2017 at 11:07 AM.
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    Late Minoan tombs points way to early European migration


    Researchers at the University of Huddersfield have visited Rethymnon in Crete, to collect samples from the late Bronze Age Necropolis of Armenoi, one of the world's finest archaeological sites. DNA analysis of the ancient skeletal remains could provide fresh insights into the origins of European civilisation.

    Dr Ceiridwen Edwards and PhD student George Foody were permitted to take bone samples and teeth from over 110 of the more than 600 skeletons discovered in the Necropolis, a rock-hewn burial site from the Late Minoan period dating to more than 4,000 years ago. During their two-week visit, the Huddersfield researchers – part of a team that included colleagues from Oxford University and the Hellenic Archaeological Research Foundation – also took DNA swabs from more than 100 contemporary Cretans. They sought people whose grandmothers were from Crete in order to analyse links to the Minoan period.

    https://m.phys.org/news/2017-03-late...-european.html
    Last edited by Arame; 04-03-2017 at 08:07 AM.

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    Quote Originally Posted by Arame View Post
    Late Minoan tombs points way to early European migration


    Researchers at the University of Huddersfield have visited Rethymnon in Crete, to collect samples from the late Bronze Age Necropolis of Armenoi, one of the world's finest archaeological sites. DNA analysis of the ancient skeletal remains could provide fresh insights into the origins of European civilisation.

    Dr Ceiridwen Edwards and PhD student George Foody were permitted to take bone samples and teeth from over 110 of the more than 600 skeletons discovered in the Necropolis, a rock-hewn burial site from the Late Minoan period dating to more than 4,000 years ago. During their two-week visit, the Huddersfield researchers – part of a team that included colleagues from Oxford University and the Hellenic Archaeological Research Foundation – also took DNA swabs from more than 100 contemporary Cretans. They sought people whose grandmothers were from Crete in order to analyse links to the Minoan period.

    https://m.phys.org/news/2017-03-late...-european.html
    I hope it will contain also Y-DNA... if not... it would be nearly unuseful: the problem of Minoans is their origin... with only mtDNA we know only half of the truth.

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    Quote Originally Posted by Romilius View Post
    I hope it will contain also Y-DNA... if not... it would be nearly unuseful: the problem of Minoans is their origin... with only mtDNA we know only half of the truth.
    This doesn't sound like they plan on testing any y-dna:

    . . . They sought people whose grandmothers were from Crete in order to analyse links to the Minoan period.
    Another dull mtDNA study.

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    Reply to reply:

    http://biorxiv.org/content/early/2017/04/03/122218

    Reply To Lazaridis And Reich: Robust Model-Based Inference Of Male-Biased Admixture During Bronze Age Migration From The Pontic-Caspian Steppe

    Amy Goldberg, Torsten Gunther, Noah A Rosenberg, Mattias Jakobsson

    doi: https://doi.org/10.1101/122218

    Abstract

    Comparing the sex-specifically inherited X chromosome to the autosomes in ancient genetic samples, we (1) studied sex-specific admixture for two prehistoric migrations. For each migration, we used several admixture estimation procedures, including ADMIXTURE model-based clustering (2), comparing X-chromosomal and autosomal ancestry in contemporaneous Central Europeans, interpreting greater admixture from the migrating population on the autosomes as male-biased migration. For migration into late Neolithic/Bronze Age Central Europeans (BA) from the Pontic-Caspian steppe (SP), we inferred male-biased admixture at 5-14 males per migrating female. Lazaridis & Reich (3) contest this male-biased migration claim. For simulated individuals, they claim that ADMIXTURE provides biased X-chromosomal ancestry estimates. They argue that if the bias is taken into account, then X-chromosomal steppe ancestry is similar to our autosomal ancestry estimate, and that hence, steppe male and female contributions are similar. We conduct simulations of ancient and modern data under a range of conditions. We conclude that our inference of male-biased Pontic-Caspian steppe migration, seen using ADMIXTURE, STRUCTURE, mechanistic simulations, and X/autosomal FST, is robust. Our analysis further illuminates the impact of small haploid reference samples on ADMIXTURE; we look forward to refining sex-specific migration estimates as larger, higher-coverage ancient samples become available.
    Last edited by rozenfeld; 04-03-2017 at 06:05 PM.

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