摘要
用采自云南省33个县的703个稻瘟病菌株与不同交配型的标准菌株交配结果表明,云南省稻瘟病菌中广泛存在着A、a两种交配型菌株.不同稻作区的有性世代形成率差异明显.一季晚籼稻区有性世代形成率高达94.4%,以下依次为水陆稻作区(49.2%)、籼粳交错区(24.0%)、单双季水稻区(21.7%)、高原粳稻区(20.2%)、高寒粳稻区(10%),即从南到北,有性世代形成率渐次下降,说明有性世代形成率随地理环境、气侯条件、生态条件及稻作类型的变化而变化.这对稻瘟病菌起源、传播及其遗传变异的研究是极富启发性的.
A total of 370 isolates of Pyricularia oryzae from 33 counties of Yunnan, China were studied for the perfect state formation and mating type. The two mating types (A, a) were found at the same time in 4 different rice growing regions. The rate of perfect state formation determined from rice growing region of origin was, Single-crop late indica-94.4%, Paddy and upland rice region-49.2%, crisscross region of Indica and Japonica-24.0%, single and double cropping Indica-21.7%, highland Jadonica-20.2%, and high-altitude and cold Japonica region-10.0%.Since the perfect state formation rate was high in the strains isolated from the southern regions rather than the strains from the northern regions, it is estimated that perfect state formation was effected with the geographic, climatic and ecological environment, and the variety in the rice growing region of origin. This study will be helpful to research the origin, transmission and genetic variation of rice blast fungus.
出处
《西南农业学报》
CSCD
1991年第1期69-72,共4页
Southwest China Journal of Agricultural Sciences
基金
云南省科委应用基础研究基金资助项目
关键词
稻瘟病菌
有性世代
交配型
云南
Pyricularic oryzae, Perfect State, Mating Type, Yunnan
