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采自江苏33个县的102个禾谷镰刀菌菌株在8—9个不同抗感品种上进行离体麦穗单小花注射接种,测试抗扩展性的结果表明,江苏各地菌株间的致病力、品种间抗病性及品种×菌株互作均有极显著差异,但将供试菌株归类入所属各县,则县际间菌株的平均致病力无显著差异。由此提出,在赤霉病抗性鉴定中,应以一个地区的混合菌株作为接种菌源;并指出,迄今尚不能确认禾谷镰刀菌有明显的致病专化性。 试验还研究分析了部分小麦品种与禾谷镰刀菌株之间的相互关系。明确望水白、苏麦3号、镇74-95等抗病品种均为抗扩展性的广谱抗源,当前生产上已经和正在推广的品种宁麦3号、扬麦3号、80鉴-2都严重感染赤霉病,应考虑加速选育出抗病的中、高产品种来代替。
102 Fusarium graminearum strains collected from 33 counties in Jiangsu Province were inoculated with single flower inflorescences in vitro on 8-9 different resistant varieties. The results of testing the anti-expansibility showed that the pathogenicity among strains in Jiangsu Province There were significant differences in the disease resistance and varieties × strains inter-working between the cultivars. However, no significant difference in the average pathogenicity of the strains was found between the tested strains in their respective counties. Therefore, it is suggested that a mixed strain of one area should be used as the inoculation source for the identification of Fusarium head blight resistance, and pointed out that so far, it has not been confirmed that Fusarium graminearum has obvious pathogenicity. The experiment also studied and analyzed the relationship between some wheat cultivars and Fusarium graminearum. Clear water look clear, Sumai 3, the town of 74-95 and other resistant varieties are broad-spectrum anti-scalability against the current production has been and is being promoted varieties Ningmai 3, Yangmai 3, 80 Kam -2 are seriously infected with scab, should consider accelerating the breeding of disease-resistant varieties of high yield instead.