Fig. 1

Phylogenetic tree and the distribution of LBD genes of three species in seven subgroups, including class Ia-Id, class IIa and class IIb. (a) A phylogenetic tree of LBD proteins of pear, apple and Arabidopsis. A phylogenetic tree of LBD protein family was constructed by Mega-X using the Neighbor–Joining (NJ) method and 1000 bootstraps. The red branches indicates the class I genes, and the blue branches indicates the class II. The yellow star, green circle and blue tick indicates the LBD protein in pear, apple and Arabidopsis, respectively. (b) The percentage of LBD genes of three species in each subgroup. The orange part indicates the proportion of LBD genes in pear; The green part indicates the proportion of LBD genes in apple; The blue part indicates the proportion of LBD genes in Arabidopsis