Figure 1From: Genome-wide identification, characterization and expression analysis of populusleucine-rich repeat receptor-like protein kinase genesUnrooted phylogenetic tree of LRR-RLK genes retrieved from Populus trichocarpa . The phylogenetic tree was established with amino acid sequences of the LRR domains by the Neighbor-Joining (NJ) method. All PtLRR-RLKs were divided into fourteen distinct subfamilies (I to XIV).Back to article page