摘要
利用全国统一的７个稻瘟病菌鉴别品种，把１９９７年采自全省２６个县市的９９个有效单孢分离菌划分为３５个生理小种。与１９８７～１９８９年的测定结果比较，出现了１６个新的生理小种，分别是ＺＡ１，ＺＡ２，ＺＡ９，ＺＡ１７，ＺＡ３３，ＺＡ３４，ＺＡ３８，ＺＡ４９，ＺＡ５４；ＺＢ５，ＺＢ１６，ＺＢ１０；ＺＣ８；ＺＤ５，ＺＤ６和ＺＦ２，且多为强致病力的ＺＡ群小种。过去的优势小种ＺＧ１已被ＺＡ１所取代。籼型种群小种出现频率在本次测定中为８７．８８％。结果表明，强致病力籼型小种的大量增加和广泛分布是导致许多水稻杂交组合感病化的主要原因。
Pathogenic races of Pyricularia oryzae were tested with Chinese differential varieties in 1998.
99 monosporus isolated from 26 counties in 1997 were divided into 35 races of 7 populations.
Compared with the result in the period from 1987 to 1988, there are 16 new races found, which
are ZA1, ZA2, ZA9, ZA17, ZA33,ZA34,ZA38,ZA49,ZA54,ZB5,ZB16,ZB10,ZC8,ZD5,ZD6,ZF2 and
concentrate on the ZA population of violent pathogenicity. The dominant race has changed from
ZG1 to ZA1. Indica race frequency accounts for 87.88% in this test. The result indicates that the
increase of Indica races of strong pathogenicity and wide distribution in Guizhou are main
reasons which lead many hybridrices to the susceptibility to pathogen of rice blast.
出处
《贵州农业科学》
CAS
1999年第3期33-35,共3页
Guizhou Agricultural Sciences
基金
贵州省"九五"攻关项目
关键词
稻瘟病菌
生理小种
鉴别品种
Pyricularia oryzae
pathogenic race
differential varieties
