Fig. 2.

Within and between population diversity for the ten genetic groups of P. graminis f. sp. tritici isolates. a Genetic Group 10 (G10), which contained UK-01, was among the groups with the lowest level of nucleotide diversity. The number (n) of isolates per group is indicated. Group 6 had only one isolate and therefore calculation of the nucleotide diversity was not applicable (N/A). Box plot excludes outliers. b Genetic Group 9 (G9), which contained isolates from the recent stem rust outbreak in Sicily, was the most distantly related to all other genetic groups (F_ST 0.20–0.57). Pair-wise comparisons between the ten genetic groups of P. graminis f. sp. tritici were calculated using Wright’s F_ST statistic