Fig. 2From: Evolution patterns of NBS genes in the genus Dendrobium and NBS-LRR gene expression in D. officinale by salicylic acid treatmentThe syntenic gene analysis results among D. officinale, D. nobile, D. chrysotoxum and V. planifolia. The gray lines represent colinear gene clusters and the red lines represent orthologous NBS gene pairsBack to article page