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    We investigate a 2,000-year genetic transect through Scandinavia spanning the Iron Age to the present, based on 48 new and 249 published ancient genomes and genotypes from 16,638 modern individuals. We find regional variation in the timing and magnitude of gene flow from three sources: the eastern Baltic, the British-Irish Isles, and southern Europe. British-Irish ancestry was widespread in Scandinavia from the Viking period, whereas eastern Baltic ancestry is more localized to Gotland and central Sweden. In some regions, a drop in current levels of external ancestry suggests that ancient immigrants contributed proportionately less to the modern Scandinavian gene pool than indicated by the ancestry of genomes from the Viking and Medieval periods. Finally, we show that a north-south genetic cline that characterizes modern Scandinavians is mainly due to the differential levels of Uralic ancestry and that this cline existed in the Viking Age and possibly earlier. Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved.

    Citation

    Ricardo Rodríguez-Varela, Kristjan H S Moore, S Sunna Ebenesersdóttir, Gulsah Merve Kilinc, Anna Kjellström, Ludvig Papmehl-Dufay, Clara Alfsdotter, Birgitta Berglund, Loey Alrawi, Natalija Kashuba, Verónica Sobrado, Vendela Kempe Lagerholm, Edmund Gilbert, Gianpiero L Cavalleri, Eivind Hovig, Ingrid Kockum, Tomas Olsson, Lars Alfredsson, Thomas F Hansen, Thomas Werge, Arielle R Munters, Carolina Bernhardsson, Birgitte Skar, Axel Christophersen, Gordon Turner-Walker, Shyam Gopalakrishnan, Eva Daskalaki, Ayça Omrak, Patxi Pérez-Ramallo, Pontus Skoglund, Linus Girdland-Flink, Fredrik Gunnarsson, Charlotte Hedenstierna-Jonson, M Thomas P Gilbert, Kerstin Lidén, Mattias Jakobsson, Lars Einarsson, Helena Victor, Maja Krzewińska, Torun Zachrisson, Jan Storå, Kári Stefánsson, Agnar Helgason, Anders Götherström. The genetic history of Scandinavia from the Roman Iron Age to the present. Cell. 2023 Jan 05;186(1):32-46.e19

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    PMID: 36608656

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