Fig. 2

Evolutionary comparison and gene conservation of C. neglecta genome. a The phylogenetic tree and expansion/contraction of gene families among 16 plant species. The phylogenetic relationship and divergence time estimation is based on all single-copy orthologous gene families shared by selected species. The number at the root (17,467) denotes the total number of gene families predicted in the most recent common ancestor (MRCA). A total of 1,033 gene families are substantially expanded, and 1,590 gene families are contracted in C. neglecta compared with other genomes. b Shared gene families among C. neglecta, B. oleracea, R. communis, J. curcas and C. rubella. The five species contain 7,432 common gene families, and C. neglecta has 333 specific gene families. c Macrosynteny relationship between C. neglecta, V. vinifera, and A. trichopoda genomes. Macrosynteny patterns between A. trichopoda and V. vinifera show that each A. trichopoda region aligns to three syntenic regions in V. vinifera, and each V. vinifera region aligns to four syntenic regions in C. neglecta, which experienced two additional rounds of crucifer genome duplication