知识与财富的链接
目的研究枝孢状枝孢霉及常见致病性暗色真菌基因多态性,初步了解它们在同属内与同种内、属间与种间的基因遗传相似性及遗传变异性。方法随机扩增DNA多态性(RAPD)分析:应用GenTLETM DNA提取试剂盒提取菌丝体DNA,以RAPD法对18株暗色真菌的DNA指纹图谱进行分析。结果共选用10个随机引物进行扩增,筛选出3个具有稳定、清晰DNA扩增带型的引物(引物1、4、5);18株真菌DNA带型不完全相同,有一定的种间和种内的遗传变异性和遗传相似性,腐生菌枝孢状枝孢霉与其他部分暗色真菌位于同一树组中;同种真菌并不都具有遗传相似性。结论RAPD分析表明,包括枝孢状枝孢霉在内的暗色真菌在属内各种间不一定有遗传相似性;但腐生菌与致病菌的DNA带型未见明显特征性差异,似乎还有一定遗传相似性。
OBJECTIVE To investigate the DNA polymorphism of saprophytes and pathogenicity of dematiaceous fungi species and to find out the relationship between them.METHODS The total DNA was extracted with GenTLETM DNA extraction kit,and the randomly amplified polymorphic DNA(RAPD) assay was used to study the fingerprinting of 18 strains.RESULTS Of ten random primers used,three(primers 1,4,5) were chosed for genotype.There were some degrees of variation and genetic similarities in RAPD patterns of 18 isolates,with in...
