Individual observed heterozygosity averaged per population as estimated using vcftools for the global dataset of 38,550 SNPs.

The mean, the standard deviation (SD), and the standard error (SE) are presented for each bar plot; dots represent outliers. The results for the non-parametric Kruskal-Wallis test, implemented to test for differences between the populations at a worldwide scale, are given above the graph. Color code: blue = native range; red = invasive range. Populations codes as in Table 1.