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１９８６年叶锈病在加拿大和美国广泛流行，有些品种比原来的抗性减弱。为了给硬粒小麦育种工作提供信息开展了叶锈抗性遗传的研究。就６个硬粒小麦品种的成株期对１５个叶锈小种的抗性遗传情况进行了研究，试验采用的硬粒小麦品种（ＴｒｉｔｉｃｕｍｔｕｒｇｉｄｕｍＬ．）有Ｌｌｏｙｄ，Ｍｅｄｏｒａ，Ｐｅｌｉｓｓｉｅｒ，Ｑｕｉｌａｆｅｎ，Ｓｔｅｗａｒｔ６３和Ｗａｋｏｏｍａ，这些品种已被证明携带有苗期抗性基因。把每一个品种都与一个易感品系（ＲＬ６０８９）进行杂交和反杂，并于田间圃用１５个生理小种鉴定４个Ｆ２群体和６个反杂交所产生的２９或３０个Ｆ２家系。鉴定结果与温室条件下苗期所鉴定同样材料的结果相比较。合并数据表明，具苗期抗性的每一个基因在田间条件下成株期也是有效的。ＢＣ１Ｆ２代的分离表明Ｌｌｏｙｄ携带１个显性基因，Ｐｅｌｉｓｓｉｅｒ具有１个隐性基因，它们仅仅在成株期有效。因此，所有的苗期抗性基因对硬粒小麦育种者来说都具有潜在价值。Ｌｌｏｙｄ和Ｐｅｌｉｓｓｅｒ所携带的额外成株抗性也应具有用的。
Leaf rust was widespread in Canada and the United States in 1986, with some varieties weaker than the original. Leaf rust resistance genetic studies were conducted to provide information on durum wheat breeding. The inheritance of resistance of 15 leaf rust races at adult stage in 6 durum wheat cultivars was studied. Triticum turgidum L. was tested by Lloyd, Medora, Pelissier, Quilafen, Stewart63 and Wakooma These varieties have been shown to carry seedling resistance genes. Each of the cultivars was crossed and crossed with a susceptible strain (RL6089) and identified in the field with 15 physiological races from 4 F2 populations and 6 crossbreeds that produced 29 or 30 F2 families. The results of the identification are compared with the results of the same material identified in the greenhouse at the seedling stage. The pooled data suggest that each of the seedling-resistant genes is also effective at the adult stage under field conditions. Isolation of the BC1F2 generation indicated that Lloyd carries one dominant gene and Pelissier has one recessive gene, which are only effective at the adult stage. Therefore, all seedling resistance genes have potential value for durum breeders. Additional adult plants carried by Lloyd and Pelisser should also be used.