水稻品种混栽和单一栽培与稻瘟病的分布  

Rice Blast in Pure and Mixed Stands of Rice Varieties

作　　者：诸葛根樟 JM Bonman 

机构地区：[1]浙江省农业科学院 [2]国际水稻研究所

出　　处：《中国水稻科学》1989年第1期11-16,共6页Chinese Journal of Rice Science

基　　金：The paper is a part of Ph.D.thesis conducted at IRRI;Philippines;and for the presentation at Beijing International Conference of Plant Pathology;Sept.1-5;1988

摘　　要：描述了稻瘟病害在寄主单一和混合栽培条件下的发生规律。研究表明,病害在各供试品种上的严重度与寄主的群体结构密切相关。在单一栽培的条件下,同一抗性遗传性的捕孢植株上的病害往往最重,而在不同抗性遗传特性的植株上的病害则明显下降。在混栽条件下相应的捕孢值株则明显减轻。这种现象说明,相同的垂直抗性基因能使亲和性病原菌小种群体得以增加,从而导致病害的严重流行。而在不同抗性基因的品种上,非亲和性的病原菌小种受到抑制,使病害趋于明显减轻。Rice blast disease in the host populations of pure and mixed stands of rice varieties was studied and described.The severity of disease on different test varieties was related to the structure of the host community.D sease on the trap plants exposed in pure stands differed significantly with the varieties and was most severe on the corresponding ones while in mixed stands of the varieties the disease was reduced markedly on all the component. This may be due to the fact that the population of the same host genotype with vertical re- sistance copld induce the development of compatible pathogen population causing severe disease damage while the incompatible pathogen population on the different host genotype was sup- pressed resulting in the less disease.

关 键 词：混栽 稻瘟病 栽培 小种 病害 植株 水稻品种 条件 增加 减轻 

分 类 号：S435[农业科学—农业昆虫与害虫防治] S511[农业科学—植物保护]