Figure 1From: Extreme expansion of NBS-encoding genes in Rosaceae Species tree of plant species used in this study. Stars indicate the occurrence of recent whole genome duplication (WGD). Numbers in the figure indicate species divergence time. Units: MYA (million years ago). The data were downloaded from NCBI Common Tree in the Taxonomy section (http://www.ncbi.nlm.nih.gov/) and the tree was constructed using TreeView.Back to article page