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为明确江苏省水稻条斑病菌致病力分化状况和不同类型水稻品种对条斑病抗感特性,在孕穗期采用针刺接种法对徐淮稻区2007—2009年采集分离获得的45株条斑病菌进行致病力测定,根据病原菌在6个水稻鉴别品种IRBB4、IRBB5、IRBB14、IRBB21、IR24和金刚30上的抗感反应划分致病型,从中选择具有代表性的3种不同致病型条斑病菌,并鉴定了240个不同类型的水稻品种对条斑病的抗感性。根据菌株在鉴别品种上的抗感反应将供试菌株划分为8个致病型,其中优势致病型为C3致病型,所占比例为35.5%;大多数菌株与鉴别品种间表现出弱互作关系,少数菌株表现出强互作关系。粳稻品种对条斑病的抗性明显高于籼稻,但常规粳稻和杂交粳稻对强致病力菌抗性比例仅为59.8%和37.5%。表明水稻细菌性条斑病流行仍具有潜在的威胁。
In order to clarify the pathogenicity differentiation of the pathogen of pathogenic bacteria and its resistance to leaf streak in different rice varieties in Jiangsu Province, 45 strains The pathogenicity of the pathogen was determined. According to the pathogenicity of the pathogenic bacteria in six rice cultivars IRBB4, IRBB5, IRBB14, IRBB21, IR24 and Vajray 30, the pathogenicity was divided into three representative pathogenic types Leaf blotch and identified susceptibility to streak blight of 240 different types of rice cultivars. The tested strains were divided into 8 pathotypes based on the anti-susceptibility of the strains in identifying cultivars. The predominant pathogenic pathotypes were C3 pathotypes, accounting for 35.5% of the tested ones; most of the strains showed weak Interaction, a few strains showed strong interaction. Resistance of japonica cultivars to leaf streak was significantly higher than that of indica rice, but resistance to strong virulence of conventional japonica and japonica hybrid rice was only 59.8% and 37.5%, respectively. Suggesting that there is still a potential threat to the spread of rice bacterial leaf streak.