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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (11): 2540-2554.doi: 10.16420/j.issn.0513-353x.2024-0395

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Genetic Diversity of Ralstonia solanacearum Strains Isolated from Fujian Province and Evaluation of Tomato Rootstocks for Resistance to Bacterial Wilt

WANG Rongbo1, WANG Haiyun2, ZHANG Qianrong3, CAI Songling1, LI Benjin1, ZHANG Meixiang4, LIU Peiqing1,*()   

  1. 1 Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests,Institute of Plant Protection,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China
    2 Yongtai County Crop Cultivation Service Center,Fuzhou 350799,China
    3 Crops Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China
    4 College of Life Sciences,Shaanxi Normal University,Xi’an 710119,China
  • Received:2024-05-28 Revised:2024-09-08 Online:2024-12-12 Published:2024-11-25
  • Contact: LIU Peiqing

Abstract:

In this study,62 strains of Ralstonia solanacearum were isolated in 2021 to 2022 from five tomato-growing areas in Fujian,China. Using phylotype-specific multiplex PCR(Pmx-PCR),the biochemical and race tests,all strains were identified as phylotype I and race 1. Of these,61 strains were identified as belonging to biovar Ⅲ,while one strain was classified as atypical biovar. The strains were further divided five different sequevars(14,15,16,17,and 34)based on polymorphisms in the endoglucanase(egl)gene. Among the five sequevars,sequevar 15 was the predominant type in Fujian Province. In addition,the resistance of 13 tomato rootstock cultivars to R. solanacearum was evaluated,revealing significant differences in resistance among the cultivars to different sequence types of the pathogen. It is noteworthy that two rootstock cultivars,‘Guizhen 1’and‘Weier Shengen’,exhibited broad-spectrum resistance to the predominant strains in Fujian Province.

Key words: tomato, Ralstonia solanacearum, genetic diversity, rootstock, disease resistance