Abstract

2008년도부터 2010년도에 걸쳐 국내에 판매되고 있는 고추 품종의 역병 저항성을 평가하였으며 특히 2010년도에는 대표적인 고추 재배지역에서 수집한 3개의 역병균주에 전년도의 시험에서 선발된 품종을 접종하여 저항성과 아울러 품종과 균주간의 특이적 반응을 조사하였다. 국내에 판매되는 품종들은 비교적 높은 수준의 저항성에서 이병성 품종에 이러는 연속적 분포를 보였다. 특히 품종명에 역병 저항성을 의미하는 '역강' 혹은 'PR'을 앞에 붙인 품종들 중에 역병 저항성이 매우 낮거나 없는 품종도 다수 발견되어 품종선택에 재배농가의 주의가 요망되었으며, 국가의 품종등록 및 보급체계에서 품종의 저항성인증체계의 도입도 필요한 것으로 나타났다. 2008-2009년도의 시험에서 선발된 품종을 3개 지역균주에 접종한 결과 Pc005(밀양) 균주에는 대목용 품종인 '탄탄'을 제외한 모든 노지재배용 품종들은 모두 이병성을 나타내었다. Pc003(영양) 균주보다 Pc002(괴산) 균주가 병원력이 더 강한 것으로 나타났으며, 품종의 균주에 특이적인 반응도 관찰되어 몇 가지 품종은 영양균주에는 저항성으로 나타났으나 괴산균주에는 이병성으로 나타났다. 병원균의 병원성 변이와 품종과 병원균간 특이적 반응에 대응한 농가지도와 품종 육종방안에 대하여 논의하였다. 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.

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