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1982—1984年在温室和田间对3个慢叶锈品种:中引305、中引515、中引709,2个快叶锈品种:无沙八号、纳罗的研究表明,小麦慢叶锈抗病品种具有8个抗病特性:(1)田间发病迟、普遍率增长缓慢,严重率低且发展速度慢;(2)潜伏期较长;(3)侵染频率较低;(4)夏孢子堆较小;(5)菌丝和夏孢子堆面积扩展速度慢;(6)产孢能力较弱;(7)对叶锈菌生理小种特异性不明显;(8)对产量影响不显著。慢叶锈抗病性随植株生长而增强,应用病害发展曲线下面积(AUDPC)的A值比侵染速率r值和冈珀茨方程的k值能更好地表达小麦品种的慢叶锈抗病性。利用温室测定苗期潜伏期、侵染频率和田间发病盛期旗叶的严重率指数可以作为小麦慢叶锈抗病品种的选育指标。
In 1982-1984, three slow-leaf rust cultivars were selected in greenhouse and field: Zhongyou 305, Zhongyou 515, Zhongyou 709 and 2 fast-leaf rust cultivars: No-Sha 8, The disease-resistant cultivars have 8 disease-resistant traits: (1) delayed onset of the field, slow and widespread prevalence, low rates of severe and slow development; (2) longer incubation periods; (3) less frequent infection; (4) summer (5) the mycelium and uredospore heap area is slow to expand; (6) the sporulation ability is weak; (7) the physiological races of leaf rust are not obvious; (8) the yield is not affected Significant. The disease resistance of slow leaf rust increased with plant growth. The A value of the area under the disease development curve (AUDPC) was better than the infection rate r and the k value of the Gompertz equation to express the leaf rust resistance Sick. The determination of the seedling latency, the frequency of infection and the severity index of flag leaves in the field during the field can be used as the breeding index of wheat leaf blight resistant varieties.