论文部分内容阅读
本试验研究了40个水稻品种对菲律宾4个菌系的抗性,同时比较了两种接种方法和两种鉴定时间,还观察了成株抗病品种苗期对4个菌系的反应。结果表明,用剪叶接种法和针刺接种法接种4个菌系在40个品种上,两种接种法所引起病害的级别相关极显著,相关系数分别为0.863、0.867、0.886和0.685。随着时间的延长,病级有所增长,但抗性反应无变化。某些品种接种14天后病级属抗病,21天后则发展成感病。用4个菌系分别接种到40个品种上,按其抗性反应将品种分为4群,初步推知其抗性基因。其中有10个品种可能不属于此4群。10个成株抗病品种在苗期对4个菌系的反应均为感病;不同品种对同一菌系的反应有差别,不同菌系对同一品种的致病性也有明显差异。
In this study, the resistance of 40 rice cultivars to 4 bacterial strains in the Philippines was studied. Two methods of inoculation and two identification methods were also compared. The response of four resistant strains to four bacterial strains at the seedling stage was also observed. The results showed that four strains were inoculated on 40 cultivars by the method of cut leaf inoculation and acupuncture inoculation. The correlation between the two strains was significant (0.863,0.867,0.886 and 0.685 respectively). As time went by, disease grade increased, but no change in resistance response. After 14 days of inoculation of some varieties, the disease grade is disease-resistant, and the disease develops after 21 days. Four bacterial strains were inoculated to 40 varieties, respectively, according to the resistance of the species will be divided into 4 groups, preliminary deduced the resistance gene. Of these 10 species may not belong to this 4 groups. The responses of 10 adult resistant varieties to 4 bacterial strains at the seedling stage were all susceptible. The responses of different varieties to the same strain were different, and the pathogenicity of different strains to the same species was also significantly different.