While the high‐temperature adult‐plant resistance gene Yr36 represents a promising source of quantitative and potentially race‐nonspecific resistance to wheat stripe rust (causal organism Puccinia striiformis Westend. f. sp. tritici), its tight linkage (0.3 cM) with the high grain protein content (GPC) gene Gpc‐B1 may hinder its introgression in certain cases, such as in soft wheat varieties requiring low GPC or in lines where the Gpc‐B1 allele may be associated with a yield penalty. The development and registration of two donor lines, one tetraploid (Triticum turgidum L. ssp. durum; Reg. No. GP‐945, PI 656793) and one hexaploid (T. aestivum L. ssp. aestivum; Reg. No. GP‐946, PI 664549), each carrying the resistant wild emmer (T. turgidum ssp. dicoccoides) allele for Yr36 linked with the nonfunctional Gpc‐B1 allele, are intended to overcome this potential limitation. Meiotic recombination events breaking the linkage between these two genes were discovered during the systematic screening of a population of 4500 F₂ durum plants (‘Langdon’ background) used to fine map Yr36. One of the critical recombination events was selected for fixation by self‐pollination and transferred to a California‐adapted spring hexaploid background (breeding line UC1110₅₊₁₀) through five generations of backcrossing. Genotypic and phenotypic data confirm the presence of Yr36 and the nonfunctional Gpc‐B1 allele in both registered lines.

中文翻译：

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携带部分条锈病抗性基因 Yr36 且不含 Gpc-B1 高籽粒蛋白质含量等位基因的小麦品系的注册。

虽然高温成株抗性基因Yr36代表了对小麦条锈病（致病生物Puccinia striiformis Westend. f. sp. tritici ）的定量和潜在种族非特异性抗性的有希望的来源，但它与小麦条锈菌的紧密连锁 (0.3 cM)高谷物蛋白含量 (GPC) 基因Gpc-B1在某些情况下可能会阻碍其基因渗入，例如在需要低 GPC 的软麦品种中或在Gpc-B1等位基因可能与产量损失相关的品系中。两个供体系的开发和注册，一个是四倍体（Triticum turgidum L. ssp.durum ； Reg. No. GP-945, PI 656793）和一个六倍体（T. aestivum）L. ssp。夏小麦; 注册。No. GP-946, PI 664549)，每个都携带抗性野生二粒小麦 ( T. turgidum ssp. dicoccoides ) Yr36等位基因与非功能性Gpc-B1等位基因相关联，旨在克服这一潜在限制。在对用于精细定位Yr36的 4500 F ₂硬粒小麦植物（'Langdon' 背景）种群进行系统筛选期间，发现了打破这两个基因之间连锁的减数分裂重组事件。选择一个关键的重组事件通过自花授粉固定，并转移到加利福尼亚适应的春季六倍体背景（育种系 UC1110 ₅₊₁₀) 通过五代回交。基因型和表型数据证实了Yr36和非功能性Gpc-B1等位基因在两个注册品系中的存在。