受条锈病侵染的不同小麦品种发病特点分析

Analyze of the Characteristics of Wheat Varieties Infected by Strip Rust

以10个对条锈病抗性不同的冬小麦品种为材料,在条锈病的常发易变区之一的天水连续3年进行了小麦成株期发病情况及其特点的研究,比较了终期严重度和相对病程曲线下面积年度内和年度间的差异和联系。结果表明:各品种的反应型年度间变化不大,严重度和普遍率2003和2004年基本保持稳定,2005年严重度和普遍率较前2年有所上升。相对病程曲线下面积和最终严重度二者相关系数为0.98,说明以后可以通过直接调查最终严重度来鉴定慢锈性。

Ten winter wheat varieties which have different resistance to stripe rust were selected as the material in this study. In Tianshui, which is regard as one of the stripe rust aberrance with high frequency, the research of the characteristics of wheat infected by strip rust during wheat adult plant stage was conducted. The final severity and the relative area under disease progress curve were compared by investigation in 2003 -2005. The results showed that, there is little variation among 2003, 2004 and 2005. The severity and the incidence were stable between 2003 and 2004, but rose in 2005. Correlation coefficient between relative area under disease progress curve and final severity is O. 98, indicated that we can identify slow rust by investigating final severity directly.