摘要： 1993～1998年对河南省13个主栽冬小麦品种白粉病的系统调查和抗性鉴定及评价结果表明:①河南主栽冬小麦品种中没有对白粉病免疫的品种,发病最重的是豫麦13号,平均病指28.9,平均AUDPC 值502;发病最轻的是郑州831,平均病指2.3,平均AUDPC值25。②感、抗白粉病性没有明显变异的品种占总数38%,有明显变异的品种占62%,其中,高感变中感的品种1个(西安8号),中感变高感的品种1个(豫麦18号);中抗变中感(抗性丧失)的品种2个(豫麦17和41号);高抗变中抗的品种2个(豫麦24号和郑州831)。并就此分析了小麦品种抗感性发生变异的原因。

关键词: 冬小麦, 品种, 白粉病, 抗病性, 感病性, 变异动态

Abstract: The variation dynamic of resistance or susceptibility to powdery mildew for 13 winter wheat cultivars in Henan during 1993 to 1998 was analyzed in this paper.The results showed:(1) There were no immune cultivars.The cultivars of disease development heaviest was Yumai 13,average desease index and AUDPC has reached 28.9 and 502,respectively.(2) There were 5 cultivars no changing in resistance or susceptibility to powdery mildew.These account for 38%.The resistance or susceptibility of 8 cultivars to powdery mildew have taken place variation.These account for 62%.The reasons of resistance or susceptibility variation to powdery mildey in wheat cultivars were analyzed.

Key words: Winter wheat, Cultivars, Powdery mildew, Resistance, Susceptibility, Variation dynamic

中图分类号: 

• S512.110.34