论文部分内容阅读
用中国小麦秆锈菌小种Z1C3,34,34C2及35C5中9个不同菌系推导了来自秆锈菌不同传播区间里有代表性的41个小麦生产品种的抗秆锈基因,综合分析了中国小麦秆锈菌优势小种稳定的原因.基因推导表明:来自秆锈菌次要越冬及冬后北传桥梁区内的品种除鄂恩1号外,其余均未含有效抗性基因;来自秆锈菌越夏偶发区内的品种含有Sr5,22,25等基因;来自秆锈菌越夏易发区(主要东北春麦区)内的品种主要含有Sr13,14,22,32,35,36,37,Gt等单个或结合基因.结果也表明:中国小麦品种对秆锈菌,尤其是对优势小种ZIC3的抗性水平明显地由南向北呈梯度增强局势.
Nine rust resistant genes from 41 wheat cultivars in different propagation stages of S. typhus were derived from 9 different bacterial strains of Z1C3, 34, 34C2 and 35C5 from wheat stalk rust races in China. The reason for the stability of the races of wheat stalk rust. The deduced genes showed that all the cultivars from the secondary wintering and late winter after the stem rust had no effective resistance genes except for E’en 1. The cultivars containing Sr5, 22,25 and other genes. The varieties from the stem rust fungus Yuexiu area (the main northeast spring wheat area) mainly contain single or combined genes such as Sr13, 14, 22, 32, 35, 36, 37 and Gt. The results also showed that the resistance level of Chinese wheat cultivars to P. rust fungi, especially to the dominant race ZIC3, obviously increased gradient from south to north.