Distribution of genes for resistance to the wheatgrass mildew fungus in Japanese wheat cultivars and of their corresponding genes in the wheat mildew fungus

Y. Tosa, Tomoya Nakamura, M. Kusaba
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引用次数: 4

Abstract

Genotypes of Japanese wheat cultivars at loci for resistance to the twheatgrass mildew fungus, Erysiphe graminis f. sp. agropyri, were examined using the gene-for-gene relationship. Most cultivars carried two genes, Pm10 and Pm15 for resistance to the wheatgrass mildew fungus. Almost all cultivars were non-carriers of Pm11 and Pm14. On the other hand, all isolates of the wheat mildew fungus, E. graminis f. sp. tritici, collected from various areas in Japan were non-carriers of Ppm10, Ppm11, Ppm14, and Ppm15, avirulence genes corresponding to Pm10, Pm11, Pm14, and Pm15, respectively. From these results we suggest that the population of the wheat mildew fungus had lost Ppm11 and Ppm14 before its migration to Japan.
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日本小麦品种抗小麦草霉病基因的分布及其在小麦草霉病菌中的对应基因
利用基因对基因关系分析了日本小麦品种抗小麦草霉病位点的基因型。大多数品种携带Pm10和Pm15两个抗小麦草霉病基因。几乎所有品种都不携带Pm11和Pm14。另一方面,从日本不同地区收集的小麦霉变菌E. graminis f. sp. tritici均不携带Pm10、Pm11、Pm14和Pm15对应的毒力基因Ppm10、Ppm11、Ppm14和Ppm15。根据这些结果,我们认为小麦霉变菌在迁移到日本之前已经失去了Ppm11和Ppm14。
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