Fig. 1
Boxplots (median, 25th percentile, 75th percentile, minimum and maximum) of pairwise distances expressed as single nucleotide polymorphisms (SNPs) (a) or small insertions/deletions (InDels) (b) into Salmonella enterica subsp. enterica serovars Dublin (n = 60), Enteritidis (n = 528), Pullorum (n = 10) and Gallinarum (n = 28). Normality of distribution and equality of variances were checked with Shapiro-Wilk and Fisher tests, respectively. Statistical differences (*: p < 5.0×10−2; **: p < 1.0×10−2; ***: p < 1.0×10−3; ****: p < 1.0×10−4; *****: p < 1.0×10−5; ******: p < 1.0×10−6) are calculated with Wilcoxon rank sum (i.e. non-normal distribution with equality of variances) or Kolmogorov-Smirnov (i.e. non-normal distribution without equality of variances) tests