黑龙江农业科学Issue(4)：43-47,5.DOI:10.11942/j.issn1002-2767.2017.04.0043
烟台地区小麦纹枯病病原菌群体组成与致病力分化
Composition and Virulence Variation of the Pathogen of Wheat Sharp Eyespot from Yantai
摘要
Abstract
In order to promote the prevention and control of wheat sheath blight,a total of 40 Rhizoctonia isolates from different counties of Yantai was collected and isolated,the anastomosis groups by nuclear staining,hyphal fusion reaction and rDNA-ITS sequence analysis were determined,the growth rate and pathogenicity of different strains through measuring were compared.The results showed that the strains of wheat sharp eyespot in Yantai belonging to AG-D,AG-4 and AG-5 three fusion groups,comprising 92.5%,5.0% and 2.5% respectively; the growth rate was between 5.33 to 13.0 mm?d.-1,dividing into three types: fast,medium and slow,comprising 55.0%,40.0% and 5.0% respectively.The 20 strains of AG-D fusion group were randomly selected to determine their pathogenicity,and the disease index was between 16.67%~68.25%,which were divided into three grades: highly virulent,moderately virulent and weakly virulent strains; linear analysis revealed a positive correlation between growth rate and pathogenicity of Rhizoctonia strains in Yantai area.关键词
小麦纹枯病/生长速率/致病力/融合群Key words
wheat sharp eyespot/ growth rate/ pathogenicity/ anastomosis groups分类
农业科技引用本文复制引用
于晓丽,王培松,张伟,陈敏,王英姿..烟台地区小麦纹枯病病原菌群体组成与致病力分化[J].黑龙江农业科学,2017,(4):43-47,5.基金项目
烟台市科技发展计划资助项目(2013NC327,2014NC107) （2013NC327,2014NC107）
国家现代农业产业技术体系资助项目(CARS-3-2-23) （CARS-3-2-23）
