Phylogenetic relationships of RGA08 predicted CDS and schematic representation of the corresponding CC-NB-LRR domains. Different colored boxes indicate the RGA protein domains identified manually after a multiple RGA08 CDS alignment. Blue boxes represent the N-terminal coiled-coil region (CC). Green boxes represent the nucleotide-binding region and the ARC domain shared by APAF-1, R and CED-4 proteins (NB-ARC domain). Pink boxes represent the 15 leucine-rich repeats (LRR). Yellow boxes represent simple sequence repeats. Sites predicted to be under positive selection according to PAML analysis are indicated by stars. The sizes of boxes and gaps between domains are drawn according to scale.