摘要
用分小种接种法在共18个品种-小种组合上进行了水稻稻瘟病菌（MagnaporthegriseaBarr.）寄生适合度测定方法的研究。用综合病指法、流行速率法、抗性组分法三种方法推求了不同品种-小种组合的寄生适合度；并通过相关分析研究了三种寄生适合度估算方法之间的相互关系，建立了以综合病指寄生适合度（PFID）、流行速率寄生适合度（PFr）、综合抗性组分寄生适合度（PFRC）为因变量，以侵染几率FIP、病斑面积（FSS）、产孢面积（FPS）和产孢量（FPD）为自变量的相对寄生适合度预测模型。
The methods of estimation of relative parasitic fitness (PF) of rice blast races on different cultivars were stuided in the greenhouse and the field experinment. ①By single race inoculation, eight components of epidemic and the apparent infection rate of 6 cultivars, 3 races' combinations were observed and the PF were estimated based on these data. ②Based on correlation analysis, it is clear that infection probability, lesion area, rate of lesion expansion, sporalating area, disease index, rate of sporulation and apparent infection rate can be used in the estimation of PF. ③By stepwise regression, prediction models of relative PF dependent upon relative infection probability, relative lesion area and relative sporulating area were developed.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1997年第5期51-57,共7页
Journal of China Agricultural University
基金
国家自然科学基金!39230260
