大麦黄花叶病是我国长江中下游和东部沿海大麦的重要病害,造成严重减产。我们以往初步研究认为,我国各地大麦黄花叶病毒对大麦品种的致病性存在差异。近年日本和西欧等报道,本病毒具有不同株系。为了探明我国该病毒致病性的分化,进行本研究,现将结果报道于后。一、材料和方法 Barley yellow mosaic disease is an important disease of barley in the middle and lower reaches of the Yangtze River and the eastern coast, causing serious yield reduction. Our previous preliminary research suggested that the pathogenicity of barley yellow mosaic virus in different parts of China to barley varieties is different. In recent years, Japan and Western Europe reported that the virus has different strains. In order to ascertain the pathogenicity of the virus differentiation in our country, the study, the results are reported later. First, materials and methods