Fig. 1From: Genome-wide identification of PbrbHLH family genes, and expression analysis in response to drought and cold stresses in pear (Pyrus bretschneideri)Un-rooted phylogenetic tree of PbrbHLH proteins.MEGA 7 was used to construct the phylogenetic tree based on the protein sequences. iTOL was used to annotate and review the phylogenic tree. The proteins were clustered into 21 groups. Different background colors indicate the different group of the PbrbHLH proteinsBack to article page