Epidemiological Characteristics of Slow-leaf-blasting Resistance of Rice = 벼 品種의 Slow-leaf-blasting型 抵抗性의 疫學的 特徵

국문 초록 (Abstract)

벼 品種의 slow-leaf-blasting形 低抗性의 特徵을 여러 가지 疫學地標를 使用하여 調査하였다. 供識品種 모두 밭못자리에서 幼苗滔熱炳에 대해 感受性이었지만, 農白과 銀河는 本畓에서 感受性品種 洛東, 農林6號 및 振興보다 잎滔熱炳의 發生이 늦고 進展이 느리며 發病量도 적었다. 供試한 疫學地標 중에서 病進展曲線面積은 Vanderplank의 傳染速度보다 벼 品種의 滔熱炳 抵抗性 平價에 더 有用하였으며, Gompertz모델이 logistic모델보다 잎滔熱炳 進展狀況을 자세히 記述하였다. 작은 炳進展曲線面積과 낮은 傳染速度 및 切片으로 特徵지워지는 벼 品種의 slow-leaf-blasting形 低抗性은 圃場에서 늦은 發病과 느린 病進展으로 顯著하게 적은 發病量만을 許容하는 벼 品種의 相對的인 能力으로 定義할 수 있다.

다국어 초록 (Multilingual Abstract)

Characteristics of slow-leaf-blasting resistance of rice cultivars were assessed using several epidemic parameters. All the cultivars tested were susceptible to seedling blast in upland nurseries, but Nongbaek and Ginga had less amount of leaf blast severity with later disease onset and slower disease development than did susceptible cultivars Nakdong, Norin 6 and Jinheung in flooded fields. Among the epidemic parameters tested, areas under disease progress curves were more useful than Vanderplank's apparent infection rates for the evaluation of leaf blast resistance of rice cultivars, and Gompertz model described the more precise states of leaf blast progress than logistic model. Slow-leaf-blasting resistance of rice cultivars characterized by small areas under disease progress curves and low infection rates and intercepts can be defined as the relative ability of rice cultivars to permit only a distinctly little amount of leaf blast severity with late disease onset and slow disease development in fields.