Aegilops tauschii (Ae. tauschii) is a diploid (2n = 2x = 14) wild grass species, which has been reported as the progenitor of hexaploid wheat (Triticum aestivum) with D-genome. In this study, 68 Ae. tauschii accessions with diverse geographical backgrounds were investigated for their resistance to infection by the leaf rust fungi Puccinia triticina. Two Ae. tauschii accessions that exhibited hyper-resistance to leaf rust at both seedling and adult stages were identified. Utilizing two susceptible Ae. tauschii ecotypes and keumkang, a common Korean wheat cultivar known to be susceptible to leaf rust, as the negative control, further investigations were conducted for understanding the mechanism underlying immunity to leaf rust disease of these two resistant accessions. Resistant accessions displayed the increased β-1,3-glucanase activity to prevent fungal penetration and the better peroxidase activity to cope with leaf rust-induced oxidative stress. Moreover, transcriptional analyses reveal the important role of the LRR receptor-like serine/threonine-protein kinase FLS2 (lrr) to the disease resistance of the two ecotypes. Ae. tauschii is a remarkable genetic source, especially for abiotic and biotic stress resistance genes, as the plant is known for its wide-ranging geographical habitat and adaptability to different environments. This, combined with the fact that Ae. tauschii and wheat share a close evolutionary relationship, is indicative of the immense benefit of using Ae. tauschii as a material for improving the quality of synthetic wheat. Our aim was to identify and evaluate the strongest Ae. tauschii contenders for breeding leaf rust-resistant synthetic wheat.

中文翻译：

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两种用于合成小麦发育的耐叶锈病的埃及节节菜材料的表征

taegchii（Ae。tauschii）是二倍体（2n = 2x = 14）的野生草种，据报道它是具有D基因组的六倍体小麦（Triticum aestivum）的祖先。在这项研究中，68 Ae。研究了具有不同地理背景的tauschii品种对叶锈病真菌Puccinia triticina的抗性。两个Ae。鉴定了在苗期和成年期均表现出对叶锈病的高抗性的tauschii种质。利用两个易感的Ae。tauschii生态型和keumkang是一种常见的韩国小麦品种，已知其易受叶锈病的影响，作为阴性对照，还进行了进一步的研究以了解这两个抗性种质对叶锈病免疫力的基本机制。抗性种质显示β​​-1增加，3-葡聚糖酶活性可防止真菌渗透，更好的过氧化物酶活性可应对叶片锈蚀引起的氧化胁迫。此外，转录分析揭示了LRR受体样丝氨酸/苏氨酸蛋白激酶FLS2（lrr）对两种生态型的抗病性的重要作用。e tauschii是一种重要的遗传资源，特别是对于非生物和生物抗逆基因而言，因为该植物以其广泛的地理栖息地和对不同环境的适应性而闻名。这与事实相结合。tauschii和小麦有着密切的进化关系，这表明使用Ae的巨大好处。tauschii作为提高合成小麦品质的原料。我们的目标是识别和评估最强的Ae。