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Abstract:
https://www.archeologia.uw.edu.pl/ar...-wschodniej-2/
https://www.archeologia.uw.edu.pl/en...-has-a-future/
Leonid Vyazov (Faculty of Science, University of Ostrava, Ostrava, Czech Republic), Gulnaz Sagmanova (Faculty of Science, University of Ostrava, Ostrava, Czech Republic), Olga Flegontova (Faculty of Science, University of Ostrava, Ostrava, Czech Republic), Harald Ringbauer (Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany, Department of Human Evolutionary Biology, Harvard University, Cambridge, United States), David Reich (Department of Human Evolutionary Biology, Harvard University, Cambridge, United States), Pavel Flegontov (Faculty of Science, University of Ostrava, Ostrava, Czech Republic)
Genetic identification of Slavs in Migration Period Europe using an IBD sharing graph
"Popular methods of genetic analysis relying on allele frequencies such as PCA, ADMIXTURE and qpAdm are not suitable for distinguishing many populations that were important historical actors in the Migration Period Europe. For instance, differentiating Slavic, Germanic, and Celtic people is very difficult relying on these methods, but very helpful for archaeologists given a large proportion of graves with no inventory and frequent adoption of a different culture. To overcome these problems, we applied a method based on autosomal haplotypes. Imputation of missing genotypes and phasing was performed according to a protocol by Rubinacci et al. (2021), and IBD inference was done for ancient Eurasian individuals with data available at >600,000 1240K sites. IBD links for a subset of these individuals were represented as a graph, visualized with a force-directed layout algorithm, and clusters in this graph are inferred with the Leiden algorithm. One of the clusters in the IBD graph emerged that includes nearly all individuals in the dataset annotated archaeologically as “Slavic”. According to PCA a hypothesis for the origin of this population can be proposed: it was formed by admixture of a Baltic-related group with East Germanic people and Sarmatians or Scythians. The individuals belonging to the “Slavic” IBD sharing cluster form a chronological gradient on the PCA plot, with the earliest samples close to the Baltic LBA/EIA group. Later “Slavic” individuals are shifted to the right, closer to Central and Southern Europeans and probably reflecting further admixture of Slavs with local populations during the Migration Period."
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