中国小麦条锈菌鉴别寄主维尔对条锈病的温敏抗性研究

维尔是中国小麦条锈菌重要鉴别寄主，通过潜育期变温处理对其进行温敏抗性检测和基因推导分析。本研究发现，维尔对小麦条锈菌流行小种条中32号的抗性表现为侵染型由常温下的高侵染型向高温下的低侵染型转变，侵染指数降低，呈现高温诱导抗条锈性；通过与已知的微效基因品系比较及方差分析，推测维尔对条中32号的温敏抗性可能是由2对高温诱导表达的温敏微效基因控制。建议将维尔作为温敏微效基因资源在抗病育种中利用，作为鉴别寄主用于小种鉴定时，要严格控制鉴定温度，不要超过18 ℃。

Temperature-sensitive reaction of the differential variety Virgilio of Chinese wheat to stripe rust

The variety Virgilio was one of the differential hosts of Chinese wheat for Puccinia striiformis f.sp. tritici. It was found that the infection rate and index of Virgilio by the pathotype CY32 were lower compared with that under lower temperature, indicating the presence of a high temperature induced resistance to stripe rust. Through comparisons of known temperature sensitive minor gene and analysis of variance, it was indicated that the temperature sensitive resistance of Virgilio to CY32 was probably controlled by two temperature sensitive minor genes. Virgilio as a temperature sensitive minor gene resource is useful in breeding for resistance to stripe rust, but when it is used as one of the differential hosts, it is necessary to strictly control the temperature without exceeding 18 ℃, since the relative infection type may differ depending upon the temperature.