PSA and other <i>P. syringae</i> strains used in this study for genome sequencing or for analysis with genome-derived SNP markers.

Strain sources are Landcare Research, NZ, http://www.landcareresearch.co.nz/resources/collections/icmp; Verified Laboratory Services (VLS) at Te Puke, http://www.vls.net.nz; or held by the authors. Zhibo Zhao and Lili Huang at Northwest A&F University, China, supplied genomic DNA.