Evolutionary relatedness of P. sojae PL genes. Phylogenetic relationships among the putative PL genes found in P. sojae were inferred using deduced amino acid sequences. The phylogenetic trees were obtained by the Neighbor-joining method. Robustness of the trees was evaluated by a bootstrap with a 1000 replications. Not all number are shown to avoid cluttering in areas containing neighboring clades with short branches; however nodes whose existence is supported by bootstrap values greater than 60, 70, 80, 90, 95, and 99% are marked with the letters a, b, c, d, e, and f, respectively. (Trees with bootstrap numbers are available upon request).