Fig. 2

Statistical analysis of libraries using rlog transformed data: a) Heatmap showing hierarchical clustering of biological replicates using sample-to-sample distances. Blue and white colors represent low and high values of distance, respectively. b) Principal component analysis (PCA) showing sample clustering of libraries. Different shape of data points refer to the cv Leccino (LC) and Ogliarola salentina (OG) whereas red and blue colours indicate healthy (Hty) and Xylella fastidiosa-infected (Xfinfect) plants, respectively