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五 关于鉴定方法 这里就鉴定方法、即水平抗性与垂直抗性的区分、水平抗性程度的测定和测定水平抗性时如何排除垂直抗性的干扰作些初步的探讨。 一、水平抗性和垂直抗性的区分; 一般试用着以下方法。 1.历史考查法:凡某品种在各地历年抗性表现稳定者,可能为水平抗性。对新育成的品种此法无能为力。 2.多点联合鉴定:在病菌易变的各常发区进行多点联合鉴定,连续数年或数季,凡抗性表现稳定者,可能为水平抗性。日本和菲律宾国际水稻研究所都就稻瘟病进行了多点鉴定。这里有两个问题必须重视和加以研究,其一是必须作好田间设计,及病情数据的统计分析。由于水平抗性是一种数量性
V. About the Methods of Identification Here are some preliminary studies on the methods of identification, ie, the distinction between horizontal resistance and vertical resistance, the determination of the level of resistance, and the determination of how to exclude vertical resistance when measuring horizontal resistance. First, the distinction between horizontal resistance and vertical resistance; generally try the following method. 1. Historical test method: where a variety of resistant throughout the years the performance of resistance may be level of resistance. The law of newly cultivated varieties of this powerless. 2. Multi-point joint identification: Mutagenesis in the common areas of susceptibility to multi-point joint identification, for several years or several quarters, who showed stable resistance may be level of resistance. Japan and the Philippines International Rice Research Institute have carried out more identification of rice blast. There are two problems that we must pay attention to and study. First, we must make the field design and the statistical analysis of the disease data. Because horizontal resistance is a quantitative