Fig. 3

Neighbor-joining tree of A-, B- and C-class MADS-box, AP2/EREBP family and CYC-like genes. a Tree of A-, B- and C-class MADS-box proteins. Sequences are from Antirrhinum majus and Arabidopsis thaliana. The tree is calculated based on protein sequences of partial MADS domain and K domain. Neighbor-joining tree shows that SQU-, DEF-, GLO- and PLE-like genes amplified in Petrocosmea glabristoma and P. sericea are well clustered with the corresponding orthologs in A. majus and A. thaliana, respectively. b Tree of AP2/EREBP family proteins. The tree is calculated based on protein sequences between the two conserved AP2 domains. AmLIP1 and AmLIP2 are from A. majus. Others are from A. thaliana. In this tree, PgLIP, PsLIP and AmLIP1/2 form a clade that is further clustered with AtAP2 from A. thaliana. c Neighbor-joining tree of CYC-like proteins in Petrocosmea. All sequences used are from the CYC2 clade TCP proteins. PseCYC1C and PseCYC1D are well clustered with PsiCYC1C/PgCYC1C and PsiCYC1D/PgCYC1D, respectively. The numbers above internal branches give bootstrap probabilities above 50%. Genes isolated in this study are bold. Group names are marked on the right side. Am, A. majus; At, A. thaliana; Pg, P. glabristoma; Ps, P. sericea, Pse, P. sericea; Psi, P. sinensis