Fig. 2From: Contrasting genetic variation and positive selection followed the divergence of NBS-encoding genes in Asian and European pearsChromosome location of NBS-encoding genes in P. bretschneideri (a) and P. communis (b). Different colors represent different types of NBS-encoding genes. Blue (NBS-LRR), purple (TIR-NBS-LRR), red (CC-NBS-LRR), green (NBS), cyan (TIR-NBS), black (CC-NBS). The x-axis represents the chromosome number, and the y-axis represents chromosome lengthBack to article page