Extended Data Fig. 5: Genetic relatedness among a Slavic Period IBD-sharing community in Europe.

a, Left: map highlighting the “Slavic Period” IBD-sharing community (1.1) (n = 602) identified applying a hierarchical cluster detection approach to a network constructed from pairwise IBD-sharing similarities between 2,657 ancient, post-Neolithic Eurasian individuals. A “Northern SP” sub-cluster (1.1.1) (n = 329) is highlighted in blue, a “Southern SP” sub-cluster (1.1.2) (n = 264) in orange. A boxplot comparison of Latitude coordinates in both clusters is indicated, showing significant differentiation among a North-South gradient (Welch Two Sample t-test; t = 16.331, df = 589.69, p < 2.2e-16). Right, ancient individuals from the Northern SP sub-cluster and Southern SP sub-cluster projected onto the modern European genetic variation. Made with Natural Earth. b, Hierarchical cluster analysis applying Ward’s minimum variance method to the normalized, average sIBD sharing (> 1 cM) between IBD clusters (n = 24) identified using community detection. The dendrogram and statistical support for the bifurcations from multiscale bootstrap resampling are shown. The ancestry compositions of selected relevant clusters (inferred using supervised ADMIXTURE) are indicated as pie charts. c, Average sIBD (> 1 cM) between the Slavic Period cluster and 23 major IBD clusters identified using community detection. Error bars indicate three standard errors.