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小麦梭条花叶病已成为我国长江、黄河中下游、淮河流域地区小麦上的一种重要病害,选用抗病品种是综合防治该病害的一项关键措施。1986年我们在筛选、推广抗病品种的同时,首次发现由于小麦梭条花叶病致病力不同而导致了地区间品种抗病性的差异。为进一步证实这一现象的存在,我们采用病土和人工机械接种试验方法,连续多年测定了省内外20多个地区毒源的200多个小麦品种,结果如下:经对毒源与品种的互作反应分析,筛选出一批对不同致病力有明显“鉴别”能力的品种。研究结果还表明,WSSM致病力分化较为复杂,不同地区的毒源致病力几乎亦不相同。鉴于某些品种对不同毒源表现为高抗(无症)和高感两种极为明显的反应(图1),以及参试品种的抗性水平、显症时差和症状,将参试毒源分为A、B、C、D 4种类型。A型:多数品种(68％)不显症状,高感品种所占比例小(8％),病株轻度黄化;B型:不显症状品种比例最小(24％),但在发病品种中,多数(58％)发病轻,表现抗(耐)病;C型:不显症
Wheat shuttle mosaic disease has become an important disease on the Yangtze River, the middle and lower reaches of the Yellow River, and the wheat in the Huaihe River Basin. The selection of resistant varieties is a key measure to comprehensively control the disease. In 1986, we screened and popularized the disease-resistant varieties. At the same time, we found for the first time that the differences in disease resistance among different regions caused by different pathogenicity of the wheat spindle mosaic disease. To further confirm the existence of this phenomenon, we used the soil and artificial mechanical inoculation test methods to determine the more than 200 wheat varieties in more than 20 areas in the province for many years. The results are as follows: For reaction analysis, a number of varieties with different “virulence” to different pathogenicity were selected. The results also show that WSSM pathogenicity differentiation is more complicated, different regions of virulence is almost the same. In view of the extremely obvious reaction of some varieties to high resistance (asexuality) and high susceptibility to different sources (Figure 1), as well as the resistance level of the tested varieties, the time difference and symptom of symptoms, Divided into A, B, C, D 4 types. Type A: the majority of varieties (68%) showed no symptoms, the proportion of high susceptible cultivars was small (8%), and the diseased plants were mildly yellowed. Type B: the smallest proportion of non-symptom cultivars was 24% The majority (58%) had mild disease and showed resistance to (resistant) disease; C type: no obvious disease