Fig. 2: Evolutionary and comparative genomic analyses.

a The phylogenetic tree of I. indigotica and eight other Brassicaceae species with C. hassleriana as the outgroup. All branch bootstrap values are 100. Gene family expansions are indicated in purple, while gene family contractions are indicated in light brown. The estimated divergence times (million years ago, Mya) are indicated at each node; bars are the 95% highest probability densities (HPDs). Circles in blue represent recent whole-genome duplication events. b Ks value distributions between B. rapa, I. indigotica, and A. thaliana. c Orthogroups shared by selected species