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The purpose of bacterial whole genome sequencing is to understand all the genetic information of bacteria, identify bacteria species and determine the taxonomic location. Its significance is to use bioinformatics analysis technology for gene prediction and functional annotation of sequences, which can provide molecular biological basis for the study of bacterial unique biological characteristics (pathogenic mechanism, drug resistance mechanism, host interaction mechanism, symbiosis mechanism and metabolic mechanism, etc.). The bacteria can colonize plants, promote plant growth, resist pathogen invasion and so on.