Fig. 8: Relationship between Pgt virulence, admixture, and sexual recombination.

a Violin plot showed increased virulence of the F2 Pgt progeny on disease resistance genes Sr7b, Sr11, Sr6, Sr9b, Sr30, and Sr24 compared to two parental isolates (4a or CDL 78-21-BB463, race BFBJC; 7a or CDL 75-36-700-3, race SCCLC). b Genetic diversity (π) was lower in the sample of North American Pgt isolates (n = 15) than in the sample of isolates outside of North America (n = 22). (Two-sided Mann–Whitney U-test p value = 2.2e-16). Outliers of π greater than 0.015 are not displayed. c Virulence was reduced in the isolates from North America (n = 15) compared to the remaining population (n = 22) (Two-sided Mann–Whitney U-test p value = 2.15e-09). Box plots show the median and interquartile ranges (IQR). The end of the top line is the maximum or the third quartile (Q) + 1.5 × IQR. The end of the bottom line denotes either the minimum or the first Q − 1.5 × IQR. The dots are either more than the third Q + 1.5 × IQR or less than the first Q − 1.5 × IQR.