Barley powdery mildew caused by Blumeria graminis f. sp. hordei can be effectively controlled using genetic resistance. Moreover, specific resistances are also important for characterizing cultivars and verifying their origin, purity and authenticity. Winter barley is distinguished by several specific resistances, which are usually absent in spring barley. Besides responses caused by known genes, many cultivars showed a response suggesting the presence of an unknown resistance. Therefore, the aim of this research was firstly, to test winter barley cultivars, suspected to carry an unknown resistance gene, using a large collection of pathogen isolates for their expression of this specific response and to characterise the corresponding resistance. A set of 16 winter barley accessions originating from four gene banks was studied where each accession was represented by five single plant progenies. For resistance tests, 56 isolates of the pathogen were used. A new resistance with a proposed designation of Lu was found in all 16 selected accessions. Apart from Lu, eight well‐known Ml genes (a6, a8, a12, g, h, Lo, ra and Ru2) were postulated. Two accessions of cv. 'Borwina' originating from different gene banks were found to differ in their set of resistance genes.

中文翻译：

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冬大麦品种对白粉病的新抗性

大麦白粉病引起的白粉病F。sp。霍尔迪可以利用遗传抗性有效控制。此外，特异性抗性对于鉴定品种和验证其起源，纯度和真实性也很重要。冬季大麦的特征在于几种特定的抗性，而春季大麦通常不存在。除了由已知基因引起的应答外，许多品种还显示出应答，表明存在未知的抗性。因此，本研究的目的首先是测试大量携带未知抗性基因的冬季大麦品种，使用大量病原分离株表达这种特异性反应并表征相应的抗性。研究了一组来自四个基因库的16个冬季大麦种质，其中每个种质均由5个单一植物后代代表。对于耐药性测试，使用了56种病原体。在所有选择的16个种质中均发现了一种新的抗性，建议使用Lu命名。除了鲁，八位知名假定M1基因（a6，a8，a12，g，h，Lo，ra和Ru2）。简历的两个登录名。发现来自不同基因库的“ Borwina”在其抗性基因组方面有所不同。