Climate change is leading to increased occurrence of and yield losses to wheat diseases. Managing these diseases by introducing new, effective and diverse resistance genes into cultivars represents an important component of sustainable wheat production. In 2016 and 2017 a set of primary hexaploid synthetic wheat was studied under high disease pressure: powdery mildew, leaf and stem rust in Omsk; Septoria tritici and S. nodorum in Moscow. A total of 28 synthetics (19 CIMMYT synthetics and 9 Japanese synthetics) were selected as having combined resistance to at least two diseases in both years of testing. Two synthetics (entries 13 and 18) originating from crosses between winter durum wheat Ukrainka odesskaya-1530.94 and various Aegilopes taushii accessions, and four synthetics (entries 20, 21, 23 and 24) from cross between Canadian durum wheat Langdon and Ae. taushii were resistant to all four pathogens. Pathological and molecular markers evaluation of resistance suggests presence of new genes and diverse types of resistance. The novel genetic sources of disease resistance identified in this study can be successfully utilized in wheat breeding.

中文翻译：

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初级六倍体合成物：小麦抗病性的新来源

气候变化导致小麦病害的发生和产量损失增加。通过将新的、有效的和多样化的抗性基因引入栽培品种来管理这些疾病是可持续小麦生产的一个重要组成部分。2016年和2017年在鄂木斯克研究了一套初级六倍体合成小麦高病害：白粉病、叶锈病和茎锈病；Septoria tritici 和 S. nodorum 在莫斯科。在两个测试年中，共有 28 种合成物（19 种 CIMMYT 合成物和 9 种日本合成物）被选为对至少两种疾病具有联合抗性。两个合成品（条目 13 和 18）源自冬粒小麦 Ukrainka odesskaya-1530.94 和各种 Aegilopes taushii 种质之间的杂交，以及四个合成品（条目 20、21、23 和 24）来自加拿大硬粒小麦 Langdon 和 Ae 之间的杂交。taushii 对所有四种病原体都具有抗性。耐药性的病理和分子标记评估表明存在新基因和不同类型的耐药性。本研究中鉴定的抗病性新遗传源可成功用于小麦育种。