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春小麦品种Ｌｅｍｈｉ中有１个基因，品种Ｌｅｅ、Ｃｏｍｐａｉｒ和Ｆｉｅｌｄｅｒ各有２个基因，每个基因能抗由Ｐｕｃｃｉｎｉａｓｔｒｉｆｏｒｍｉｓ引起的条锈病．为了确定这些基因的染色体位置，将这些品种同感病的二倍体中国春（ＣｈｉｎｅｓｅＳｐｒｉｎｇ）小麦及一套非整倍体的中国春小麦杂交．单体的Ｆ＿１植株由细胞学确定，在温室中生长并且自交以产生Ｆ＿２种子，Ｆ＿２幼苗连同亲本用选择的北美条锈菌接种。结果证明：Ｆｉｅｌｄｅｒ中的Ｙｒ＿６是在７Ｂ染色体上，Ｃｏｍｐａｉｒ中的Ｙｒ＿８是在染色体２Ｄ上，又指出Ｌｅｍｈｉ品种中的Ｙｒ＿（ｌｅｍ）是在染色体１Ｂ上；Ｌｅｅ中的Ｙｒ（Ｌｅｌ）是在５Ｄ染色体上，Ｙｒ＿（ｌｅ２）是在６Ｄ上；Ｃｏｍｐａｉｒ中的Ｙｒｃｏｍ在染色体５Ｂ上及Ｆｉｅｌｄｅｒ中的Ｙｒ＿（Ｆｉｅ）在６Ｄ上。用北美条锈小种测试检查不出Ｌｅｅ中的基因Ｌｒ＿７。作者建议正式命名Ｙｒｃｏｍ为Ｙｒ＿（１９），Ｙｒ＿（Ｆｉｅ）为Ｙｒ＿（２０），Ｙｒ＿（Ｌｅｍ）为Ｙｒ＿（２１），Ｙｒ＿（Ｌｅｌ）为Ｙｒ＿（２２），Ｙｒ＿（ｌｅ２）为Ｙｒ＿（２３）。
The spring wheat cultivar Lemhi has one gene, and the varieties Lee, Compair and Fielder each have two genes, each of which is resistant to stripe rust caused by Pucciniastriformis. To determine the chromosomal location of these genes, these varieties were crossed with the susceptible diploid Chinese Spring wheat and a set of aneuploid Chinese spring wheat. Monomeric F_1 plants were cytologically identified, grown in the greenhouse and selfed to produce F_2 seeds, and F_2 seedlings, along with their parents, were inoculated with the selected North American stripe rust. The results show that Yr_6 in Fielder is on chromosome 7B, Yr_8 in Compair is on chromosome 2D, and Yr_ (lem) in Lemhi is on chromosome 1B; Yr (Lel) in Lee is on chromosome 5D , Yr_ (le2) is on 6D; Yrcom on Compair is 6D on chromosome 5B and in Fielder. The gene Lr_7 in Lee was not detected with the North American stripe rust test. The author suggests that Yrcom be formally named Yr_ (19), Yr_ (Fie) be Yr_ (20), Yr_ (Lem) be Yr_ (21), Yr_ (Lel) be Yr_ (22), Yr_ (le2) be Yr_ .