张传博;苏晓庆;
ZHANG Chuan-bo~(**),SU Xiao-qing~(***)(Department of Biology,Guiyang Medical College,Guiyang 550004,China)

• 1:贵阳医学院生物学教研室
• 2:贵阳医学院生物学教研室 贵州贵阳550004现工作单位:贵州师范大学生物技术与工程学院
• 3:贵州贵阳550004

摘要(Abstract)：

目的:将灭蚊腐霉Pythiumsp.与从猝倒、茎腐植株分离到的9个病原真菌相鉴别。方法:以瓜果腐霉作阳性对照。以ITS1和ITS4为引物,采用PCR方法对待测菌株的rDNA ITS区进行了扩增,再用4种限制性内切酶(TaqI,H infⅠ,H in6Ⅰ,MboⅠ)进行酶切,经琼脂糖凝胶电泳后得到RFLP图谱,利用Ne i et al的片段比较方法计算菌株间相似程度,NTSYS-PC软件包进行聚类分析。结果:对11个菌株进行了快速鉴别,证明从受感染的植物菌株上分离到的真菌主要是瓜果腐霉,与灭蚊腐霉Pythiumsp.有明显区别。结论:rDNA ITS区的PCR-RFLP可用于真菌的快速鉴别。
Objective: To quickly distinguish a strain of mosquito-killing fungus,Pythium sp.(MKP),from other 9 strains of Pythium isolated from sick plants.Methods: Internal transcription spacer(ITS) of ribosomal DNA from MKP and the 9 strains of fungi was amplified using polymerase chain reaction(PCR) with universal primers ITS1 and ITS4.PCR products were digested with four restriction enzymes(HinfⅠ,CfoⅠ,MboⅠ,and TaqⅠ).Their electrophoresis patterns of restriction digestion were achieved.Similarity between strains was analyzed with fragment comparing method of Nei et al and NTSYS-PC software.Results:The 9 strains of fungi were different from MKP.Conclusions: 1) The 9 strains of fungi isolated from sick plants are not MKP;2) PCR-RFLP method based on rDNA ITS regions is useful in quick distinguishing of fungi.

关键词(KeyWords)： 害虫防治,生物学;灭蚊;腐霉菌属;聚合酶链反应;DNA限制酶类
pest control,biological;mosquito control;Pythium;polymerase chain reaction;DNA restriction enzymes

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目资助(批准号:30160003)

作者(Authors): 张传博;苏晓庆;
ZHANG Chuan-bo~(**),SU Xiao-qing~(***)(Department of Biology,Guiyang Medical College,Guiyang 550004,China)

DOI: 10.19367/j.cnki.1000-2707.2005.06.001

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