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期 刊 ：植物保护学报 2005年

关键词：小麦；鉴别寄主；抗条锈性；遗传分析；

Keywords:Wheat, differential cultivar, stripe rust resistance, genetic analysis,

摘 要 ：小麦品种维尔是中国小麦条锈菌重要鉴别寄主。将该品种分别与完全感病品种铭贤169和其它抗病品种杂交,获得各组合的F₁、BC₁和F₂代群体及部分F₃家系。在温室对各组合亲本及F₁、BC₁和F₂代群体进行了苗期抗性鉴定。结果表明,维尔对CY17和CY23菌系的抗性由1对主效隐性基因控制。等位性分析表明,维尔中抗CY17和CY23菌系的基因与Triticum spelta album中的1对抗性基因等位或紧密连锁,将其命名为YrVir1。而维尔对Su-1的抗性则由1对显性基因控制,将其命名YrVir2。同时采用CY17和CY23菌系对铭贤169/维尔组合的48个F₃家系进行了苗期抗性鉴定,根据平均抗性指数和样本方差将这些家系分为3组,卡方测验证明了维尔对上述两菌系的抗性由1对主效基因控制,同时还可能受微效基因的影响。

Abstract:Virgilio, one of the wheat cultivars used to differentiate races of Puccinia striiformis West. in China, was crossed with susceptible cultivar Mingxian 169 and cultivars with different genes to determine the genetic basis of its stripe rust resistance. Seedlings of the parents, F₁, F₂, BC₁ and some F₃ progenies were evaluated for resistance to Chinese pathotypes of P.striiformis.It was indicated that Virgilio has one recessive gene for resistance to Chinese pathotype CY17 and CY23, and one dominant gene for resistance to pathotype Su-1. When inoculated with CY17 or CY23, 48 F₃ families of cross Mingxian 169/Virgilio could be separated into three groups and fit the 1 ∶ 2 ∶ 1 of theoretical ratio, this result inferred that Virgilio have any minor genes for resistance to CY17 and CY23 except for one major gene. Based on the results of linkage analysis, the gene that confers resistance to CY17 and CY23 was allele or closely linked to one gene in Triticum spelta album and was denominated as YrVir1. The gene that confers resistance to Su-1 was denominated as YrVir2.

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