Fig. 2From: Genome-wide analysis of WRKY transcription factors in white pear (Pyrus bretschneideri) reveals evolution and patterns under drought stressPhylogenetic trees of WRKY genes in pear. The un-rooted phylogenetic tree of WRKY domains was constructed with MEGA5.1 program with the NJ method. The numbers beside the branches represent bootstrap values based on 1000 replications. The name of groups (1, 2a-e, and 3) are shown at the inside of the circle. The groups of genes are shown in different colorsBack to article page