摘要
1988-1991年,从福建省内外收集和分离了161个菌株,用针刺接种法,先后在25个水稻品种上进行了病菌致病力的测定.根据从中选择的17个水稻品种对选择的16个菌株所做的试验结果表明,稻条斑病菌菌株间存在明显的致病力差异,而且这种差异是数量性的.1991年,根据125个菌株对选择的4个鉴别品种的侵染反应,将这些菌株划分为致病力强弱不同的4个菌群.0群菌致病力退化;Ⅰ群菌致病力弱;Ⅱ群菌致病力中等;Ⅲ群菌致病力最强.其中Ⅱ和Ⅲ群菌占优势,在福建省34个县市已有分布.
In 1988-1991, 161 isolates of Xanthomonas campestris pv. Oryzicola Dye from Fujian and other provinces were tested for virulence on 25 rice varieties. According to the reactions of 17 rice varieties against 16 representative isolates, it is clear that difference of virulence among isolates is of pronounced and is quantitative. In 1991, based on the reaction of 4 differentials (Jiannongzao No.8, 135, H304-23 and DZ 60), 125 isolates were classified into four bacterial groups (0,Ⅰ,Ⅱ and Ⅲ). Virulence of the 0 group is degenerat, the Ⅰ group is weakness, the Ⅱ group is moderate and the Ⅲ group is the most strenght. Both Ⅱ and Ⅲ groups are superior and distributed in fields of 34 counties and cities in Fujian for the time being.
关键词
水稻
细菌性
条斑病
致病力
rice
Xanthomonas campestries pv. oryzicola Dye
virulence
virulence variability
differentials
