Fig. 5

Selective sweeps within the barley genomes. The barley genome, comprising chromosomes 1H–7H, is presented in a circular layout [31] with a different concentric track for each of the geographically-defined groups I–VI. Within each track, the values for Tajima’s D and the diversity reduction index [log₂(DRI)] are indicated by the red and dark blue plots, respectively, sharing the y-axis with a range [− 3, 9]. The identified sweep regions are highlighted. The degree of similarity to the 6ky barley genome is indicated at the outer edge of each track by the greyscale line (gradation from white for < 83% similarity to black for > 99% identity, calculated for each genomic window as the proportion of major alleles matching the 6ky variants). In the outer track each chromosome is represented as a box, with the centromere indicated by the crossbar and the physical coordinates (Mb) marked. Positions of previously described domestication genes [15, 16] and the genes with protein-changing variants identified in this study (see Table 2) are shown in the outermost track