Fig. 4: Inferred IBD segments between various Eneolithic and Bronze Age West Eurasian Groups.
From: Accurate detection of identity-by-descent segments in human ancient DNA
We visualize IBD segments 12–16 cM long (for IBD sharing in other length classes see Extended Data Fig. 3). We applied ancIBD to identify IBD segments between all pairs of 304 West Eurasian ancient individuals (all previously published data; Supplementary Table 3) organized into 24 archaeological groups. The number in the parenthesis indicates the sample size for each archaeological group. For each pair of groups, we plot the fraction of all possible pairs of individuals that share at least one IBD 12–16 cM long, which we obtained by dividing the total number of pairs that share such IBD segments by the total number of all possible pairs: between two different groups of n1 and n2 individuals, one has n1n2 pairs, while within a group (on the diagonal in the figure) of size n one has n(n − 1)/2 pairs. LN, Late Neolithic; BAC, Battle Axe Culture; C, Chalcolithic; TRB, Trichterbecherkultur (Funnelbeaker culture); GAC, Globular Amphora Culture.
