中文摘要：

以已知抗、感反应不同的5个水稻品种为试验材料,在田间成株期的不同阶段,采用牙签嵌入法进行抗纹枯病接种试验,并于抽穗后30 d采用不同调查标准进行病级调查,研究适宜于水稻纹枯病病情调查的新标准。结果表明:在分蘖末期接种的各参试品种,采用叶鞘位调查标准的结果与常用的Rush调查标准的结果相比较,两者在不同年份间、地点间差异均不显著,相关分析结果显示,2种调查标准间相关系数在不同年份、地点间分别为0.945 5**、0.984 6**,表明叶鞘位标准作为1个新的调查标准在田间纹枯病病级调查时完全可替代Rush调查标准;对于小孕穗期接种的各品种,采用相对病级调查标准,各品种间不仅抗性差异极显著,而且品种间抗感差异大于分蘖末期接种采用叶鞘位调查标准的相应对照,并且这2种调查标准间各品种的抗、感趋势完全一致。讨论了在水稻抗纹枯病遗传研究中,以小孕穗期相对病级作为调查标准的适用范围。

英文摘要：

In order to develop more investigation standards suitable for evaluating rice SB disease rating,five rice cultivars with different levels of resistance to SB were inoculated with toothpick insertion inoculation methods during different times of rice adult stage in field,and three different investigation standards were adopted to evaluate rice SB disease rating at the 30th day after heading stage.The results were as follow: ① There were no differences between the SB disease rating data of five rice cultivars...