21个稻瘟菌株毒力与42个水稻品种抗瘟性的系统聚类分析  

Cluster Analysis of 22 Isolates by Virulence and 42 Rice Varieties on Rice Blast Resistance

作　　者：江林[1,2] 黎娟华[2] 林湛松[1,2] 彭明[2] 

机构地区：[1]海南大学环境与植物保护学院,海南儋州571737 [2]中国热带农业科学院热带生物技术研究所,海口571101

出　　处：《中国农学通报》2011年第18期17-23,共7页Chinese Agricultural Science Bulletin

基　　金：农业部"引进国际先进农业科学技术"(948):"水稻品种抗瘟基因型鉴定技术"2006-G61

摘　　要：通过对42个水稻品种进行人工离体叶片接种,明确供试水稻品种对21个稻瘟菌株的抗普和病级并在此基础上对42个水稻品种抗瘟性作了初步研究。分别按供试21个稻瘟菌株毒力差异和42个水稻品种抗瘟性的多个抗性指标进行系统聚类分析。将供试稻瘟菌株分为7类,其菌株毒力差异显著,菌株毒性频率和平均毒力之间呈现高度负相关。把水稻品种分为7类,其中第3类的第1组抗性最好,抗普在85%～100%,病级4.0以下。结果对选育水稻抗瘟新品种、合理布局区内抗性水稻和防治稻瘟病爆发具有一定的实际意义。By artificial inoculation detached leaves of 42 rice varieties,to ascertain the resistance spectrum and disease level of rice blast disease on Magnaporthe grisea of 21 strains.And the rice blast resistance of 42 rice varieties was studied.The cluster analysis on the pathogenicity of 21 isolates of Magnaporthe grisea and mulriple indexes on rice blast resistance of 42 rice varieties was made respectively.The rice blast was isolates into seven categories,and their virulence was significantly different.The pathogenic frequencies were significantly negative correlated with average virulence.The rice varieties were divided into seven categories,of which the third class,the best rice blast resistance was the first group,resistance spectrum in 85% to 100%,disease-level below 4.0.The result has a certain practical significance on breeding new varieties of resistance rice,distributing resistance rice rational in region and controlling rice blast outbreak.

关 键 词：水稻稻瘟病 离体接种 菌株毒力 水稻抗瘟性 聚类分析 

分 类 号：S435.111.41[农业科学—农业昆虫与害虫防治]