2000～2006年新育成小麦品种(系)抗条锈性鉴定分析

为了明确2000～2006年新育成小麦品种(系)的抗条锈性,采用条锈菌优势小种对1 212份小麦高代品系以及339份陕西省区试小麦品种分小种进行了抗条锈性鉴定.结果表明,供试品种(系)对条锈菌优势小种CY31、CY32及Su11-14的抗病性普遍较低,新育成小麦高代品系和陕西省区试品种对三个菌系抗病的频率分别为10.43%～55.30%和8.89%～44.82%.其中,远缘杂交后代品种(系)的抗锈性较好.另外,2001～2006年在自然诱发发病情况下,陕西省小麦区试岐山点和杨凌点共292份品种,抗病品种频率分别为5.88%～50.88%和0～50.88%.

Identification and Analysis on Resistance to Stripe Rust of Wheat Varieties (Lines) Developed during 2000～2006

Wheat stripe rust is one of the most serious diseases on wheat in China,and breeding and planting resistant varieties is the most economic,efficient and safe measure.In order to know the resistance of new breeded wheat varieties(lines) to stripe rust developed during 2000~2006,1 212 wheat higher generation lines and 339 regional trial varieties of Shaanxi province were identified by different prevalent races of Puccinia striiformis f.sp.Tritici.The results showed that most of the tested cultivars(lines) were susceptible to the dominant physiological races of CY31,CY32,Su11-14.The proportion of resistant lines among the higher generation wheat lines to the three races were 10.43%~55.30%,and the proportion of resistant varietes among the regional trial varieties of Shaanxi province were 8.89%~44.82%.Among them,breeding lines and varieties developed by distant hybridization often had high resistance to stripe rust.To determine the resistance of regional trial varities completely,the infection types of 292 regional trial varieties to stripe rust were investigated under no inoculation condition in Qishan and Yangling,The results indicated that the proportion of resistant regional trial varieties in Qishan and Yangling were 5.88%~50.88% and 0~50.88%,respectively.These results can be used to instruct wheat stripe rust resistant breeding.