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http://dx.doi.org/10.5423/RPD.2013.19.4.243

Selection of Representative Magnaporthe oryzae Isolates and Rice Resistant Gene Types for Screening of Blast-resistant Rice Cultivars  

Goh, Jaeduk (Crop Environment Research Division, National Institute of Crop Science, Rural Development Administration)
Kim, Byung-Ryun (Agricultural Environment Research Division, Chungcheongnam-do Agriculture Research & Extension Services)
Lee, Se-Won (Agricultural Microbiology Division, National Academy of Agricultural Science, Rural Development Administration)
Roh, Jae-Hwan (Winter Cereal and Forage Crop Research Division, National Institute of Crop Science, Rural Development Administration)
Shin, Dong-Bum (Crop Environment Research Division, National Institute of Crop Science, Rural Development Administration)
Jeung, Ji-Ung (Rice Research Division, National Institute of Crop Science, Rural Development Administration)
Cho, Young-Chan (Rice Breeding and Cultivation Research Division, National Institute of Crop Science, Rural Development Administration)
Han, Seong-Sook (Crop Environment Research Division, National Institute of Crop Science, Rural Development Administration)
Publication Information
Research in Plant Disease / v.19, no.4, 2013 , pp. 243-253 More about this Journal
Abstract
Rice blast is one of the most serious disease threatening stable production of rice. Breeding of resistant cultivars has been used as the most effective and useful method to controll rice blast caused by Magnaporthe oryzae. To collect rice blast isolates in fields and test their pathogenicity on new cultivars are important for establishment of new resistant cultivars breeding program of rice. Pathotypes of Korean rice blast isolates have been categorized to Korean differential race system developed in 1985. However, it is little known about genetic background of Korean differential cultivars, so that it is hard to understand for relationship between each pathogen and each host plant at genetic level. In this study, we suggested necessity of a new differential system by analyzing pathogenic responses between 24 monogenic rice lines and 200 Korean rice blast isolates. In addition, we determined the nine representative resistant genes based on the resistance responses of the monogenic lines to rice blast isolates, indexed resistant responses of the monogenic lines to ten representative rice blast isolates and selected 30 Korean representative rice blast isolates proper to Korean system. We think the newly developed differential race system can be broadly used to select resistant cultivars to rice blast in Korea.
Keywords
Differential system; Magnaporthe oryzae; Monogenic lines; Resistance; Rice blast;
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