Puccinia triticina (Pt), the causal agent of leaf rust evolves through forming new pathotypes that adversely affect the growth and yield of wheat cultivars. Therefore, continued production of resistant varieties through exploring novel sources of resistance in wild relatives which are abundantly found in Iran and the neighbouring regions is a major task in wheat breeding programs. The aim of the present study was to explore 60 wild wheat genotypes selected from the species Triticum monococcum, Aegilops tauschii, Ae. neglecta, Ae. cylindrica, Ae. triuncialis, Ae. umbellulata, Ae. speltoides, Ae. columnaris, Ae. crassa and Ae. ventricosa for resistance to leaf rust. The cultivar ‘Boolani’ and Thatcher near‐isogenic lines were used as controls. Two‐week‐old seedlings were inoculated using 10 Pt pathotypes, and the infection types were recorded. The genotypes were also analysed for polymorphism using six sequence‐tagged sites (STS) and sequence characterized amplified region (SCAR) markers. Forty‐eight genotypes produced high infection types (3⁺) for two pathotypes, but the remaining genotypes produced low infection types of ‘0; ^=’ to ‘1⁺CN’ to all pathotypes. The latter included three accessions of Ae. tauschii, two accessions of each Ae. umbellulata, Ae. columnaris and Triticum monococcum, and one accession from each Ae. triuncialis, Ae. ventricosa and Ae. neglecta. Analysis for STS and SCAR markers suggested several genotypes could carry the genes Lr9, Lr10, Lr19, Lr24, Lr26 and Lr37 or their potential orthologs in addition to unknown resistance genes. In conclusion, the identified resistant genotypes could be further characterized and used in wheat breeding programs for leaf rust resistance.

中文翻译：

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小麦野生近缘种抗叶锈性的表型和遗传多样性。

小麦锈病锈菌（Puccinia triticina，Pt）是通过形成新的病态而进化的，这些病害对小麦品种的生长和产量产生不利影响。因此，通过在伊朗和邻近地区大量发现的野生亲缘种中探索新的抗性来源来继续生产抗性品种，是小麦育种计划的一项主要任务。本研究的目的是探索60种野生小麦基因型，该基因型选自小麦，黑麦草（Aegilops tauschii）和Ae。neglecta，阂。白茅，阂。triuncialis，阂。umbellulata，阂。Speltoides，爱。专栏，爱 crassa和Ae。ventricosa对叶锈病有抵抗力。品种'Boolani'和Thatcher近等基因系被用作对照。用10种Pt病原体接种了两周大的幼苗，并记录了感染类型。还使用六个序列标签位点（STS）和序列特征扩增区域（SCAR）标记对基因型的多态性进行了分析。四十八个基因型产生了两种病态的高感染类型（3 ⁺），但是其余的基因型产生了“ 0”的低感染类型。^='至'1 ⁺ CN'代表所有病原体。后者包括Ae的三个种。陶氏菌，每个两个e umbellulata，阂。columnaris和Triticum monococcum，以及每个Ae的一个登录号。triuncialis，阂。Venricosa和Ae。忽视。对STS和SCAR标记的分析表明，除了未知的耐药基因外，几种基因型还可以​​携带Lr9，Lr10，Lr19，Lr24，Lr26和Lr37基因或它们的潜在直系同源基因。总之，可以进一步鉴定鉴定出的抗病基因型，并将其用于小麦育种计划中以防叶锈病。