Figure 3
Correspondence and phylogenetic relationship of orthologous gene pairs for NBS-encoding genes among B. oleracea , A. thaliana and B. rapa . A. corresponding relationship of orthologous gene pairs for NBS genes among three species. Ath-reg represents target region on A. thaliana Chr4 that a tandem array of NBS genes located. Bol-reg1 ~ 3 and Bra 1 ~ 3 represent trplicated regions of target region in B. oleracea and B. rapa genome, respectively. Blue characters in rectangle stands for non-R genes and red character in rectangle stands for NBS genes. Diamond stands for gene absence at the locus on these chromosome regions. Gray solid rectangle stands for non-R genes within the tandem array. B. phylogenetic relationship of orthologous gene pairs for NBS genes among B. oleracea, A. thaliana and B. rapa. different colors can distinguish different sub-trees.