81份春小麦种质资源抗条锈病评价

本研究结合苗期分小种接种和大田成株期自然诱发条件下对供试的81份春小麦资源进行抗条锈病鉴定,分析其抗条锈病情况、抗病类型及抗病性关系,结果表明:具全生育期抗条锈病类型的资源有7份,具成株期抗条锈病类型的资源有39份,有30份资源为含有成株期和对部分小种失去抗性的全生育期抗病性的抗性类型;苗期分别接种7个小种后,表现抗病的资源数为9~25份不等,表现中抗的资源为2~6份不等,表现感病的有50~69份不等,成株期表现抗病的73份,表现中抗的3份,感病的5份,即供试种质资源大部分表现为苗期感病,而成株期具有抗病性。聚类分析结果表明,该81份种质资源抗性聚类相对分散,遗传多样性水平较高。研究结果为小麦育种提供优良的抗条锈性资源。

Identification and analysis of the resistance of 81 spring wheat germplasm resources to stripe rust

To definite the resistance composition, resistance type and resistance relationship of 81 spring wheat germplasm resources to stripe rust, different races of Puccinia striiformis f.sp. tritici were used separately to evaluate the resistance at seedling stage by inoculation in greenhouse and at adult stage by natural infection in field. The results showed that seven germplasm resources showed allstage resistance, thirtynine showed adultplant resistance,and thirty showed adultplant resistance and ineffective allstage resistance to part of Chinese stripe rust races. After separately inoculated seven dominant races at seedling stage, 9-25 germplasm resources were resistant, 2-6 were intermediate resistant, 50-69 were susceptible. when tested at adult stage, 73 germplasm resources were resistant,3 were intermediate resistant,and 5 were susceptible. The results indicated that most of the germplasm resources were susceptible at seedling stage, but resistant at adult stage. Cluster analysis showed that resistance relationship of these 81 spring wheat germplasm resources were dispersed, and presented high stripe rust resistance diversity.