Figure 2.

Maximum likelihood tree of 44 representative Pseudomonas syringae pv. actinidiae biovar 3 (Psa3) strains from different countries based on genomic data. The tree was built based on the bulk of single nucleotide polymorphisms (SNPs) (excluding SNPs due to recombination) from genomic data of the strains shown in Table S3 using REALPHY (defaults, ICMP 18884) and PhyML 3.1 with the GTR model (1000 bootstraps). The red solid triangle indicates Psa3 strains from Shaanxi Province, China. The diamond indicates Psa3 strains isolated outside of China. At least six clades within Psa3 were found across China, while the global Psa3 strains mainly clustered in clade 1 with nine Chinese strains.