異なる真性抵抗性遺伝子をもつイネ品種を継代通過したいもち病菌Pyricularia oryzaeレース337の病原力の変動

概要

論文の詳細を見る
This paper deals with the changes in aggressiveness of the isolate belonging to race 337 of rice blast fungus, Pyricularia oryzae Cavara, which was re-isolated after successive passage on rice cultivars with a different single true resistance gene. An isoate (race 337) with wide spectrum of virulence was used as original inoculum for successive passage. The authors measured the rate of susceptible lesion per total lesions produced on a leaf blade and the number of conidia formed on a unit area of lesion (10 mm^2) on leaf of 4 rice cultivars possessing the same or different true resistance gene from that of passed cultivars as indicants for the aggressiveness. As the results, many isolates after successive passage enhanced the aggressiveness to the rice cultivars with the same true resistance gene as that of passed cultivars. On the other hand, many isolates decreased the aggressiveness to the rice cultivars with different true resistance gene from that of passed cultivars.
日本植物病理学会の論文
1990-01-25