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在1981—82年测定的基础上,将已测过毒力频率值比较高的品种去掉,保留毒力频率值较低的品种,另加上待测的新品种共48个,用1983年从河北省及北京、天津市采集的叶锈菌株208个进行测定,证明河北省目前大面积推广的小麦品种如科遗4号、石家庄54,衡水6404、郑州3号、冀麦9号、衡水714、济南矮6、品三九、昌乐5号、京引39、科凡51等毒力频率值都较高,达93.7—99.5％,严重感染叶锈病。抗叶锈性较好的品种有丰抗2号、丰抗10号、方秃头,毒力频率值为16.4—23.0％。区试品种中毒力频率值多教较低,如Ns—2574,80—5072,4001,冀麦10号,78—4020,乐亭1185等品种,毒力频率值为2.8—30.7％,区试品种中毒力频率值高的有75005、79—4024,分别为81.5和88.9％,属感病类型不宜推广。将河北省7个较抗叶锈病的品种与河北省208个叶锈菌株的相互关系用毒性公式表示,可以分析两个以上的品种同时对叶锈菌表现抵抗的联合反应。
On the basis of the measurement of 1981-82, the strains with relatively high frequency of virulence were removed, the varieties with lower frequency of virulence were reserved, 48 new varieties to be tested were added, 208 strains of leaf rust collected in Hebei Province, Beijing and Tianjin, which proved that the wheat varieties widely propagated in Hebei Province such as Keji No.4, Shijiazhuang 54, Hengshui 6404, Zhengzhou No.3, Ji Mai No.9 and Hengshui 714 , Jinan dwarf 6, product 39, Changle 5, Beijing lead 39, Kefan 51 and other virulence frequency values are higher, reaching 93.7-99.5%, serious leaf rust infection. Feng rust resistance better varieties Feng Fung 2, Fung anti-10, square bald, the frequency of virulence was 16.4-23.0%. The frequencies of virulence in the test varieties were much lower, such as Ns-2574, 80-5072, 4001, Jimai 10, 78-4020 and Laoting 1185, the frequency of virulence was 2.8-30.7% The species of high frequency of toxic frequencies 75005, 79-4024, respectively 81.5 and 88.9%, is a type of disease should not be promoted. The correlation between 7 leaf rust resistant varieties in Hebei Province and 208 leaf rust strains in Hebei Province was expressed in terms of toxicity formula. It is possible to analyze the combination reaction of more than two varieties while exhibiting resistance to leaf rust.