## Appendix B  
In order to inspect the overlapping of the three investigated accessions of mugnoli, a PCA model has been calculated on the colorgrams of these samples. As shown in the PCA plot in Figure 11, there is quite a strong overlap among these classes. Mainly, samples belonging to Class A fall at positive values of PC1; those appertaining to Class B present negative PC1 values; and mugnoli from Class C spread along this component. Only two samples belonging to Class C present highly positive PC2 values, but the inspection of the T\({}^{2}\)-Q plot did not allow to consider them outliers; consequently, they were retained. +++ ==WARNING: Truncated because of repetitions==  
++  
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