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Resistance Evaluation of Tomato Germplasm against Bacterial Wilt by Ralstonia solanacearum

토마토 유전자원의 Ralstonia solanacearum에 의한 풋마름병 저항성 평가

  • Received : 2014.08.07
  • Accepted : 2014.11.10
  • Published : 2014.12.31

Abstract

This study was conducted to evaluate tomato plant resistance against bacterial wilt by Ralstonia solanacearum using tomato cultivars or tomato breeding lines maintained in RDA-Genebank of Rural Development Administration and to select resistant tomato lines for breeding purpose. We evaluated the disease responses of a total of 13 cultivars and 39 breeding lines from RDA-Genebank using R. solanacearum SL341 strain, which is a representative strain in Korea. Tomato cultivar Hawaii 7996 and Moneymaker were used as a resistant control plant and a susceptible control plant, respectively. A total of 32 cultivars were susceptible and 10 cultivars showed various disease response suggesting resistant phenotype segregation in the lines. Five commercial cultivars and 5 breeding lines exhibited strong resistance to bacterial wilt by the SL341 strain. These 5 breeding lines might be used for further study of plant defense response against bacterial wilt and cloning of the resistance gene from tomato plants. Ultimately, the selected lines could be used for tomato breeding to generate bacterial wilt resistant tomato plants.

Keywords

Bacterial wilt;Resistance evaluation;Solanum lycopersicum;Tomato lines

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