我国北方玉米全蚀病菌变种类型研究

 988~1992年先后于我国北方10省(自治区)22市、县采集到玉米全蚀病罹病根茬,经分离培养获得21个致病力较强的菌株。根据各菌株的培养性状、形态特征、生理特性及致病性等可分为两类:一类M₁、M₂、M₃a、M₃b、M₃e、M₃f、M₃g、M₄a、M₄c、M₄d、M₅a、M₅b、M₆、M₇a、M₇b、M₈a、M₈b、M₉18个菌株属禾顶囊壳菌玉米变种Gaeumannomyces graminis(Sacc.) Arx et Olivier vat.maydis Yao,wang et Zhu];另一类M₃c、M₃d、M₄b菌株属禾顶囊壳菌水稻变种Gaeumannomyces graminis(Sacc.) Arx.et Olivier var.graminis Trans.]在玉米上的一个生理小种。变种内在培养性状、致病力、瓶梗孢子产生数量等方面存在着生理型差别和某些生理分化现象。

ON TYPES OF CORN TAKE-ALL VARIETIES IN NORTHERN CHINA

Corn stubbles infected by take-all fungus were collected from 22 cities or counties within 10 provinces (autonomous regions) in northern China in 1988~ 1992. 21 isolates obtained and purified from diseased tissues showed the higher pathogenicity. On the basis of their characters in culture, morphology, physiology, pathogenicity and others, all isolates were divided into two groups:one was M1, M2, M3a, M3b, M3e, M3f,M3g, M4a, M4c, M4d, M5a, M5b,M6, M7a, M7b,M8a, M8b, M9, which belonged to Gaeumannomyces graminis (Sacc. ) Arx et Olivier var. maydis Yao, Wantg et Zhu; another was M3c, M3d, M4b, which belonged to a race of Gaeumannomyces graminis (Sacc. ) Arx et Olivier var. graminis Trans, on corn. The pathogen varieties differed in cultural characteristics, pathogenicity, number of phialospores and others and showed some phenomena of physiological differentiation.