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http://dx.doi.org/10.5423/RPD.2010.16.2.148

Development of Effective Screening Method and Evaluation of Radish Cultivars for Resistance to Fusarium oxysporum f. sp. raphani  

Baik, Song-Yi (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Kim, Jin-Cheol (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Jang, Kyoung-Soo (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Choi, Yong-Ho (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Choi, Gyung-Ja (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology)
Publication Information
Research in Plant Disease / v.16, no.2, 2010 , pp. 148-152 More about this Journal
Abstract
To establish the efficient screening method for resistance of radish to F. oxysporum f. sp. raphani, we investigated the development of Fusarium wilt of two radish cultivars, 'Songbaek' (susceptible) and 'Tokwang' (moderately resistant), according to several conditions such as inoculation methods, inoculum concentrations, and dipping periods of radish roots in spore suspension. By infected soil and soil-drenching inoculation methods, Fusarium wilt did not occur on the seedlings of both cultivars. In root dipping inoculation method using cut or non-cut roots of radish plants, the cut roots were easily infected by the pathogen than non-cut roots. And the disease development of two cultivars represented significant difference in non-cut root method. On the other hand, disease severity of Fusarium wilt on radish seedlings according to inoculum concentration increased in a dose-dependant manner, regardless of dipping periods. Using screening method established from the results, the 41 commercial radish cultivars were evaluated the degree of resistance to F. oxysporum f. sp. raphani. Among them, 6 radish cultivars were resistant, 22 cultivars were moderately resistant, and 13 cultivars were susceptible to Fusarium wilt.
Keywords
Breeding; Fusarium wilt; Radish yellows; Raphanus sativus; Resistant;
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