Plant Disease (2007) 91, 1277-1287

Yeonhwa Jeong, Jinwoo Kim, Yongsung Kang, Seungdon Lee and Ingyu Hwang (2007)
Genetic diversity and distribution of Korean isolates of Ralstonia solanacearum
Plant Disease 91 (10), 1277-1287
Abstract: Genetic diversity among 478 isolates of Ralstonia solanacearum collected from various plants in Korea between 1997 and 2005 was determined based on biovar, pathogenicity, amplified fragment length polymorphism (AFLP), 16S rRNA, endoglucanase, hrpB, and mutS gene sequence analyses. Of the isolates, 440 belonged to biovars 1, 3, or 4, and 38 belonged to biovar 2. Biovar N2 isolates were not found. The biovar 1 and 2 isolates were found mainly in southern Korea, whereas the biovar 3 and 4 isolates were widely distributed throughout all nine provinces. AFLP analysis divided the 109 representative Korean isolates into six clusters that were distinct from most of the foreign isolates. Grouping of 8 representative isolates based on their 16S rRNA gene sequences indicated that biovars 1, 3, and 4 belonged to division 1, while biovar 2 belonged to subdivision 2b. Sequence analysis of the endoglucanase, hrpB, and mutS genes from the same isolates indicated that the biovar 1, 3, and 4 isolates belonged to phylotype I, while the biovar 2 isolate belonged to phylotype IV. This study is the first comprehensive analysis of genetic diversity among Korean isolates of R. solanacearum.
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Database assignments for author(s): Jinwoo Kim

Research topic(s) for pests/diseases/weeds:
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Ralstonia solanacearum		Korea-South