Genetic and Pathogenic Diversity of <Emphasis Type="Italic">Ralstonia solanacearum</Emphasis> Causing Potato Brown Rot in China |
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| Authors: | Li Wang Bingsen Wang Guozhen Zhao Xingkui Cai Suha Jabaji Philippe Seguin Huilan Chen |
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| Institution: | 1.Key Laboratory of Horticultural Plant Biology, Ministry of Education /Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture /College of Horticulture and Forestry Sciences,Huazhong Agricultural University,Wuhan,China;2.Plant Science Department, Macdonald Campus,McGill University,Quebec,Canada |
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| Abstract: | Causing potato brown rot, Ralstonia solanacearum (R. solanacearum) strains are reported as one of the most destructive bacteria to potato (Solanum tuberosum L.) in China. In this study, 113 strains were isolated from potato, collected in the four major agroecological zones in China. The study showed that 102 strains belonged to the phylotype IIB sequevar 1 (race 3 biovar 2). The 11 remaining strains belonged to the phylotype I, sequevar 13, 17, 18, 16 or 14 M, a new sequevar closely related to sequevar 14. Thirty-four strains were further characterized according to their virulence at low temperature on three wild potato species. IIB-1 strains all belonged to high and moderate virulence, while others belonged to the low virulence group, which had limited pathogenicity. |
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