*2.4. Statistical Analysis*

The data were evaluated for the distribution by the Shapiro–Wilk W-test, and the homoscedasticity was determined by Levene's test. Since the data did not show a normal distribution, the exact comparison between the two groups (naturally-infected and inoculated) was tested by the Mann–Whitney U test. The comparison of the di fferences in the data distribution between di fferent tested varieties was performed by Kruskal–Wallis ANOVA. Statistical tests and boxplot graphs were performed in Statistica 13.1. (TIBCO Software Inc., Palo Alto, CA, USA), shown in the supplementary file. Graphs were prepared by using the statistical software GraphPad Prism 5.0 (GraphPad Software Inc., San Diego, CA, USA).
