Evaluation of a collection of wild timopheevi wheat for resistance to disease and arthropod pests
Evaluation of a collection of wild timopheevi wheat for resistance to disease and arthropod pests
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DOI：
10.1094/pd-80-0928
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发表时间：
1996-08-01
期刊：
影响因子：
4.5
通讯作者：
Zwer, PK
中科院分区：
文献类型：
--
作者：
BrownGuedira, GL;Gill, BS;Zwer, PK
小麦的野生近缘种（Triticum aestivum）是小麦抗病虫害基因的重要来源。以野生四倍体小麦小麦（Triticum timopheevi var. araraticum）为材料，对黑森蝇（Mayetiola destructor）、小麦卷曲螨（Eriophyes tulipae）和6种叶面病害进行了抗性评价。叶锈病（由小麦锈病引起）、茎锈病（由小麦锈病引起）、条锈病（由小麦锈病引起）、白粉病（由小麦黑穗病引起）、棕斑病（由小麦黑穗病引起）和黑穗病（由小麦黑穗病引起）。所有测试的材料都对Septoria blotch具有抗性，并且对棕褐色斑点具有很高的抗性。虽然抗叶锈病的品种比抗条锈病、茎锈病或白粉病的品种更常见，但也检测到对特定真菌病原体的抗性。对D型黑森蝇和小麦曲螨的抗性分别为91%和27%。用黑森蝇的L型进行试验时，注意到一小部分材料的反应存在差异。鉴定出对至少5种害虫具有中高抗性的31份材料。来自伊拉克北部的加入遭到抵制的频率最高。这组野生小麦代表了一个多样化的基因库，可能对普通小麦的改良有用。
Wild relatives of wheat (Triticum aestivum) are important sources of genes for resistance to disease and insect pests. A collection of the wild tetraploid wheal species Triticum timopheevii var. araraticum was evaluated for reaction to Hessian fly (Mayetiola destructor), wheat curl mite (Eriophyes tulipae), and six foliar diseases: leaf rust (caused by Puccinia recondita f. sp. tritici), stem rust (caused by Puccinia graminis f. sp. tritici), stripe rust (caused by Puccinia striiformis), powdery mildew (caused by Blumeria graminis f. sp. tritici), tan spot (caused by Pyrenophora tritici-repentis), and Septoria blotch (caused by Septoria tritici). All accessions tested were resistant io Septoria blotch and a very high percentage were resistant to tan spot. Resistance was detected to lour obligate fungal pathogens, although accessions with leaf rust resistance were more frequent in the collection than those with resistance to stripe rust, stem rust, or powdery mildew. Resistance to Hessian fly biotype D and wheat curl mite was detected in 91 and 27% of the tested accessions, respectively. Variation was noted in reaction of a subset of accessions when tested with biotype L of Hessian fly. Thirty-one accessions with intermediate to high levels of resistance to at least five pests each were identified. Accessions from northern Iraq had the highest frequency of resistances. This collection of wild timopheevi wheat represents a diverse gene pool that may be useful for improvement of common wheal.