华北农学报Issue(z1)：251-256,6.DOI:10.7668/hbnxb.2015.S1.045
芝麻种质对不同茎点枯病致病菌株的抗性鉴定
Resistance Identification for Sesame Germplasm to Different Pathogen Strains of Macrophomina phaseolina
摘要
Abstract
Sesame is usually suffered from Macrophomina phaseolina and induced charcoal rot.The study was designed to identified sesame gerplasm resistant differences to Macrophomina phaseolina from different sources. Three strains of Macrophomina phaseolina from Nanyang,Pingyu in Henan province and Wuhan in Hubei province were inoculated into 30 sesame materials by means of toothpick at seedling stage.The results showed that strain from Pingyu had highest pathogenicity as it induced longer disease spots than that from Nanyang and Wuhan,and 23 ma-terials had longer average disease spots than that from the other two places in 30 tested materials.Most tested mate-rials were seriously infected except for WB01,08-3354,08-3368 and PS48.However,these materials showed no sig-nificant difference to the pathogen strains from Nanyang and Wuhan.Cluster analysis showed the materials with dis-ease spots less than 10 centimeters induced by the three strains were always divided intoⅠgroups,and the others fell into groupⅡ.Thus,the disease spot size of 10 centimeters could be taken as the standard for distinguishing the tolerance and susceptibility of sesame.The cluster result based on the disease spot size that induced by the pathogen strain from Nanyang was similar to that from Wuhan.They all showed more materials were clustered into groupⅠ, especially for the landraces.In contrast,cluster for Pingyu showed groupⅠand Ⅱwere considerable in the number of materials,and also in the rate of landraces and improved lines.The study figured out 10 materials that could be used for breeding for their resistance to Macrophomina phaseolina.关键词
芝麻/茎点枯病/抗病性/鉴定Key words
Sesame/Macrophomina phaseolina/Disease resistance/Identification分类
农业科技引用本文复制引用
江诗洋,黎冬华,张艳欣,王林海,高媛,张秀荣..芝麻种质对不同茎点枯病致病菌株的抗性鉴定[J].华北农学报,2015,(z1):251-256,6.基金项目
国家现代农业产业技术体系建设专项（CARS－15）；农业部物种保护项目（2015NWB033）；中国农业科学院科技创新工程项目 （）
