The pathogenicity of isolates was predicted by the Pathogen-Host Interactions database (PHI) and the Virulence Factors of Pathogenic Bacteria (VFDB). Amino acid sequences were compared in the databases by the program DIAMOND (cutoff: 40% identity). When the annotation results were over one, the best annotation was selected by ensuring the biological functions. The arrangement and similarities of gene clusters were illustrated with Easyfig (Version 2.2.2). The amino acid similarities of type VI secretion system effector genes were compared through BlastP on the NCBI website (https://blast.ncbi.nlm.nih.gov/Blast.cgi).
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