几个四倍体小麦-山羊草双二倍体及其部分亲本的抗小麦白粉病基因分析

用离体叶段接种方法鉴定了11个四倍体小麦一山羊草双二倍体、波斯小麦PS5、硬粒小麦DR147、5份山羊草、杂交高代材料Am9／莱州953*^2F5和(DR147／Ael4)／／莱州953*^2F4对20个具有不同毒力白粉菌株的抗谱。通过与含有已知抗病基因品种或品系的反应模式比较，推测Am9／莱州953*^2F5含有Pm4b，波斯小麦PS5含有Pm4b与一个未知抗病基因组合；(DR147／Ael4)／／莱州953*^2F4和硬粒小麦DR147含有Pm4a和一个未知抗病基因组合；尾状山羊草Ael4和小伞山羊草Y39抗所有白粉菌株，由于迄今还没有在尾状山羊草和小伞山羊草中鉴定出抗白粉病基因，推测这2份山羊草含有新的抗白粉病基因。除Am9外，在其它双二倍体中波斯小麦或硬粒小麦的抗性部分受到抑制。山羊草的抗性部分或完全量到抑制。

Analysis of Powdery Mildew Resistance Genes in Some Tetraploid Wheat- Aegilops Amphidiploids and Their Parents

The powdery mildew resistance genes in 11 tetraploid wheat-Aegilops amphidiploids, Triticum carthlicum acc. PS5, Triticum durum acc. DR147, 4 Aegilops accessions and advanced lines Am9/Laizhou953*2 F 5 and (DR147/Ae14)//Laizhou953*2 F 4 were analyzed by inoculating detached primary leaf segments with a set of 20 differential powdery mildew isolates. By comparisons of the response pattern of differential wheat cultivars or lines and application of the gene-for-gene hypothesis, we deduced that resistance gene Pm4b occurred in line Am9/Laizhou953*2 F 5, and an unknown resistance gene in combination with resistance gene Pm4b occurred in T. carthlicum acc. PS5. Line (DR147/Ae14)//Laizhou953*2 F 4 and T. durum acc. DR147 possessed an unknown resistance gene in combination with resistance gene Pm4a,respectively Ae. caudata acc. Ae14 and Ae. umbellulata acc. Y39 showed resistance to all the isolates tested, they should carry a novel resistance gene because no powdery mildew resistance gene has been introgressed into common wheat from Ae. caudata and Ae. umbellulata. Except in Am9, the resistance of T. carthlicum acc. PS5 or T. durum acc. DR147 was in part suppressed in an amphidiploid, the resistance of Aegilops accession was completely, or in part, suppressed in an amphidiploid.