Determination of the resistance spectrum of rice varieties (strains) to physiological races of Piricularia oryzae  

作　　者：陈增建 刘水芳 刘亦学 

出　　处：《华北农学报》1994年第S2期72-76,共5页Acta Agriculturae Boreali-Sinica

摘　　要：From 1986 to 1990 typical physiological races of Piricularia oryzae were chosen from 7 local groups,and the resistance spectrum for 768 rice varieties (strains) was determined. The resistance percentage of 34 varieties constituting 4.4% of the total was up to 80-100%, while that of 109 moderate resistance varieties constituting 14. 2% of the total was up to 60 -79%. The other 625 varieties were susceptible. Moreover, 74 highly resistant varieties were tested and divided by 10 races from the 7 groups. There were 4 types with resistance percentage up to 90% ,and 3 types with resistance percentage up to 80%. According to the distribution of the dominant physiological races in different areas .resistant varieties can be selected to facilitate variety rotation. The results above showed that the spectrum of resistance was relatively stable and had a practical value to production and breeding.From 1986 to 1990 typical physiological races of Piricularia oryzae were chosen from 7 local groups,and the resistance spectrum for 768 rice varieties (strains) was determined. The resistance percentage of 34 varieties constituting 4.4% of the total was up to 80-100%, while that of 109 moderate resistance varieties constituting 14. 2% of the total was up to 60 -79%. The other 625 varieties were susceptible. Moreover, 74 highly resistant varieties were tested and divided by 10 races from the 7 groups. There were 4 types with resistance percentage up to 90% ,and 3 types with resistance percentage up to 80%. According to the distribution of the dominant physiological races in different areas .resistant varieties can be selected to facilitate variety rotation. The results above showed that the spectrum of resistance was relatively stable and had a practical value to production and breeding.

关 键 词：RICE Piricularia ORYZAE RESISTANCE SPECTRUM RESISTANCE PERCENTAGE 

分 类 号：S511.01[农业科学—作物学]