Fig. 2: Hierarchical clustering of 50 cultivars belonging to five wheat species.

The colors of the lines (branches) highlight three clusters of cultivars corresponding to their ploidy level. The colors of the cultivar labels correspond to the color legend for species in Fig. 1a. In total, 2774 proteins were used for clustering, which included proteins unique to one of the five species and proteins common between species. All those proteins were identified across all three environments in at least one cultivar and hence belonged to the group J in Fig. 1a.