Phylogenetic tree of the NBS-LRR genes. The tree is rooted using Streptomyces sequence P25941 as an outgroup. The trees were drawn using TreeView . The tree is divided into two major groups, TNL and CNL. All the homologs detected from this study group together with CNL-A, a subgroup of CNL. The Arabidopsis genes that belong to TNL (A through H) and CNL (B through D) are used as controls. The Prunus genes C5, Cd134, F4, and D9 are also used as controls.