Fig. 3

Ancestry-informative SNPs in the exome data. The left panels present the distribution of SNPs on joint allele frequency spectra, and delineate ancestry-informative frequency classes (dashed lines). Observed proportions of variants in each frequency class (O) were logarithmically transformed and expressed by a colour gradient. The right panels show similarity of wild accessions to the selected variant sets, measured as identity-by-state (IBS). a Variants with frequencies > 0.5 in all cultivated groups and their frequency distribution in wild barley (left). The dashed line delineates 5666 ancestry-informative variants and their occurrence in wild accessions is depicted on the map (right). Note that although the allele frequency spectrum shows allele frequencies for the entire cultivated supergroup, we only selected variants that are truly major in each of groups I–VI. b Frequency distribution of major group I variants in the remaining cultivated population (left) and occurrence of the selected ancestry-informative alleles in wild accessions (right). c–g Equivalent description of major variants in groups II–VI, respectively