Figure 1From: Frequent loss of lineages and deficient duplications accounted for low copy number of disease resistance genes in CucurbitaceaePhylogenetic tree of NBS-LRR proteins from cucumber, melon and watermelon. Most clades have R proteins from all three species, showing obvious orthologous relationship. Clade names starting with “T” are from TIR subclass, while clade names starting with “N” are from non-TIR subclass.Back to article page