Research in Plant Disease 2010;16(2):141-147.
Published online August 30, 2010.
국내 시판 고추 품종의 역병 저항성
김병수, 권태룡, 황지은, 이재무, 박동근, 안준형, 김혜연
 
Resistance to Phytophthora Blight of Commercial Pepper Cultivars in Korea
Byung Soo Kim, Tae Ryong Kwon, Ji Eun Hwang, Jae Moo Lee, Dong Guen Park, Joon Hyung Ahn, Hye Yeon Kim
Abstract
Resistance to Phytophthora blight (Phytophthora capsici Leonian) of commercial cultivars of Capsicum pepper in Korea were evaluated from 2008 to 2010. In 2008 and 2009, the cultivars were tested for resistance to the Pc003 isolate collected in Youngyang, Gyeongbuk province. In 2010, the selected cultivars in the previous years were tested by inoculating with 3 isolates obtained from the pepper plants in Miryang in Gyeongnam province, Youngyang in Gyeongbuk province, and Goesan in Chungbuk province. A continuous variation in resistance from highly resistant to susceptible was observed among the commercial pepper cultivars. It was also noted that some cultivars, although their names were initiating with ``Yeokgang`` or ``PR`` meaning Phytophthora resistance, were very low in resistance or susceptible. When the resistant cultivars selected in 2008 and 2009 experiment were inoculated with the 3 isolates, all the commercial cultivars except a rootstock, ``Tantan``, succumbed to the exceptionally virulent Pc005 (Miryang) isolate. Pc002 (Goesan) was a little more virulent than Pc003 (Youngyang). A few cultivars resistant to Pc003 (Youngyang) were severely infected by Pc002 (Goesan). Significant interaction in analysis of variance suggested the differential interactions between cultivars and pathogen isolates. Strategies to breed cultivars having high level of resistance to the highly variable pathogenic fungus, Phytophthora capsici, were discussed.
Key Words: Capsicum annuum, Differential reaction, Phytophthora capsici, Resistance


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