草业学报Issue(11)：72-81,10.DOI:10.11686/cyxb2015197
立枯丝核菌病原致病性及苜蓿品种抗病性研究
Pathogenicity of Rhizoctonia solani to alfalfa seedlings and disease resistance of al-falfa varieties
摘要
Abstract
The aim of this study was to evaluate the pathogenicity of Rhizoctonia solani isolates to various alfal-fa (Medicago sativa )varieties.We used 14 varieties of alfalfa and six pathogen isolates that were isolated from roots of six different alfalfa varieties from three locations.We estimated the disease index,relative germination rate,relative root length,and relative seedling length at 14 days after inoculation with the various isolates. There were significant differences among the 14 alfalfa varieties inoculated with the six pathogen isolates (P <0.05).The isolate from ‘Goldenqueen’showed significantly stronger pathogenicity (P <0.05)than the other isolates.The isolate from ‘Powerplant’showed the weakest pathogenicity.All the fungi used in this study re-sulted in lower germination rates and shorter roots of alfalfa seedlings,and the isolate from ‘Goldenqueen’ showed the strongest effects.Based on the comprehensive evaluation of all traits,R.solani isolated from‘Goldenqueen’,‘8920MF’,and ‘Affinity’showed the strongest pathogenicity to alfalfa seedlings.Among the 14 alfalfa varieties,‘Vernal’,‘Algonguin’,and ‘Alfaking’were more resistant to R.solani,while ‘Power-plant’and ‘Amerileaf 721’were the most sensitive.关键词
紫花苜蓿/种苗/立枯丝核菌/致病性/抗病性Key words
alfalfa/seedling/Rhizoctonia solani/pathogenicity/resistance引用本文复制引用
郭玉霞,张明,管永卓,刘芳,郭志鹏,张红瑞,严学兵,王成章..立枯丝核菌病原致病性及苜蓿品种抗病性研究[J].草业学报,2015,(11):72-81,10.基金项目
国家“十二五”科技支撑计划项目（2011BAD17B04），河南省高等学校重点科研项目（15A230019）和牧草产业技术体系项目（CARS-35）资助。 （）
