棉花枯萎镰刀菌生理型致病力变异的研究  

STUDIES ON PATHOGENICITY VARIATION OF PHYSIOLOGICAL FORM Ⅲ OF FUSARIUM OXYSPORUM F.VASINFECTUM (ATK.)SNYDER ET HANSEN

作　　者：田逢秀[1] 史大刚[1] 宋夭风 徐孝华[2] 

机构地区：[1]新疆农业科学院植物保护研究所 [2]北京农业大学生物学院

出　　处：《中国农业科学》1991年第1期67-72,共6页Scientia Agricultura Sinica

摘　　要：用棉花枯萎镰刀菌生理Ⅱ、Ⅲ型4个菌系的8个同核型菌株(即绒毛形和匍匐形作为标记),进行了10个组合的原生质体融合。从每个组合中随机排列取100个融合体,进行异核体检测,从中选取10个真正融合的异核体,10个组合共获得100个融合异核体。对每个融合异核体进行繁殖扩大为一个菌株,并对这些融合异核体菌株及8个同核型菌株、同核型混合菌株进行致病力测定。结果表明,生理Ⅲ型菌系的原生质融合异核体菌株致病力增强。证明异核现象是引起生理Ⅲ型菌系致病力变异的重要因素之一。Protoplust of the homokaryon strains in physiological form Ⅱ,Ⅲ of Fusarium oxysporum f.sp. vasinfectum (ATK.) Snyder et Hansen was fused in the combination, and one hundred fusion heterokaryon strains were obtained. Pathogenicities of the fusion heterokaryon and homokaryon strains as well us the mixed homokaryon ones (R type×P type) were determined. The result shows that the fusion heterokaryon strains of physiological form Ⅲ have strengthened pathogenicities. Facts have proved that heterokaryosis may be one of the factors which associates with the pathogenicity variation of physiological form Ⅲ.

关 键 词：棉花 桔萎镰刀菌 生理型 致病力 

分 类 号：S435.621.2[农业科学—农业昆虫与害虫防治]