*2.5. Statistical Analysis*

To analyze the in vitro fumonisin biosynthesis within each country of origin, total fumonisin content was submitted to ANOVA by allowing a di fferent standard deviation per strain to comply with heteroscedasticity. Generalized least-squares were used for model fitting, as implemented in the gls() function of the nlme package [65] within the R statistical environment [66]. Heteroscedastic Welch's *t*-tests were used for pairwise comparisons of strains, within country [67].
