Evolution and structural diversification of BMY genes in studied genomes. (a) Phylogenetic tree of BMY genes. The bootstrap values between different ranges were shown with different colored stars. The lines between genes showed the paralogous genes within genomes, and the stars showed the orthologous genes between genomes (b) Gene duplications and losses. (c) Distribution of BMY genes in each three subgenomes (LF, MF1 and MF2) within S. lycoericum. (d) Distribution of BMY genes in each three subgenomes (LF, MF1 and MF2) within I. triloba. (e) Structures (Motif, Domain, CDS and UTR) of BMY genes. The unit of the Motif 1-15 and Domains (Glyco_hydro_14 and BES1_N) was aa, and the unit of CDS and UTR was bp.