水稻稻瘟病和纹枯病抗性鉴定方法

贺闽, 尹俊杰, 冯志明, 朱孝波, 赵剑华, 左示敏, 陈学伟

Methods for Evaluation of Rice Resistance to Blast and Sheath Blight Diseases

Min He, Junjie Yin, Zhiming Feng, Xiaobo Zhu, Jianhua Zhao, Shimin Zuo, Xuewei Chen

表3 水稻穗颈瘟单穗损失率分级标准

Table 3 Grades for evaluation of single panicle loss by rice blast disease

Disease score State of disease 0 No disease symptom 1 Blast disease symptom appears in primary or secondary branch of panicle and leads to less than 5.0% yield loss in each spike 3 Blast disease symptom appears in rice rachis or spike neck which leads to 5.1%-20.0% yield loss in each spike 5 Blast disease symptom appears in rice rachis or spike neck which leads to half-shriveled grain and 20.0%-50.0% yield loss in each spike 7 Blast disease symptom appears in rice spike neck which leads to shriveled kernel and 50.0%-70.0% yield loss in each spike 9 Blast disease symptom appears in rice spike neck which leads to more than 70.0% yield loss in each spike