Verticillium wilt and leaf mottle in four sunflower genotypes caused by 12 Verticillium dahliae isolates from different geographical origin expressed by a disease index (DI). The last two groups of darker bars marked with dashed line ovals represent DI values averaged for isolates from the east (V2-EE) and the west (V2-WE) of Europe. For information on particular geographical location of isolates, please see Martín-Sanz et al. (2018a). Bars with the same lower case letters are not significantly different according to the least significant difference test (P = 0.05). Adapted from Martín-Sanz et al. (2018a).