Fig. 2

Analysis of species evolution and construction of ancestral monocot karyotypes (AMK). a Phylogenetic tree constructed through concatenation method by using protein sequence of twelve species. Orange and green represent expanded and contracted gene families, respectively. b Ks density distribution. The solid line represents comparisons of species themselves, and the dotted line represents comparisons between different species. c Collinearity between chromosomes among Ac. hap1 and three other palm plants. d Dotplot between Ac. hap1 and S. polyrhiza. Blocks with the same colors represent homologous chromosome fragments originating from the same ancestral chromosome. e Species phylogeny and reconstructed monocot proto-karyotypes. WGD and WGT are represented by yellow and blue dots, respectively