Genome analysis reveals Erwinia amylovora in China is closely related to those of Kyrgyzstan and Kazakhstan
2025
Jianan Wang | Yuqiang Zhao | Shitong Wu | Xinmin Gu | Xinran Liu | Yanli Tian | Baishi Hu | Youfu Zhao
Abstract Erwinia amylovora, the causal agent of fire blight disease, is a destructive agricultural plant pathogen in the Rosaceae family. The disease was first described in North America and has now spread to more than 50 countries. The disease has recently been reported in China’s neighboring countries, including Russia, South Korea, Kyrgyzstan, and Kazakhstan. In 2016, the typical symptoms of fire blight in pear tree shoots and leaves were observed in Xinjiang province and later, it spread eastward to Gansu province, posing a threat on the national pear and apple industries. In this study, fire blight pathogen was isolated from diseased plants and the whole genome sequencing was performed for 14 (12 from Xinjiang and 2 from Gansu), 3, and 2 isolates from China, Kyrgyzstan, and Kazakhstan, respectively. Phylogenomic analysis showed that the Chinese isolates are closely related to those from Kyrgyzstan and Kazakhstan. Genome annotation reveals that most of the gene families and metabolic pathways are conserved in E. amylovora isolates. These results provide useful information in understanding how the fire blight occurs in China and what measures should be taken to eradicate the disease.
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