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黄早4玉米自交系以其综合性状优良和突出的配合力,曾被誉为“万能”自交系。但随着利用年限增长,抗病力减退、自身产量降低,制种成本增高,降低了其使用价值。近几年全国不少单位对黄早4自交系进行改良,有的已经应用于生产,取得效果不尽相同。本试验通过对多家黄早4改良系进行抗病性、丰产性和配合力等综合性状的鉴定,以从中选出有实用价值黄早4改良系,应用于当前种子生产。
Huangzao 4 maize inbred lines have been praised as “universal ” inbred lines because of their excellent comprehensive characters and prominent combining ability. However, with the growth of the use of life, reduced resistance to disease, their own production decreased, the cost of seed production increased, reducing its value. In recent years, quite a few units across the country have made improvements to Huangzao 4 inbred lines, and some of them have been applied to production with different results. In this study, we evaluated the comprehensive traits such as disease resistance, high yield and combining ability of a number of Huangzao 4 improved lines to select the practical improvement line Huangzao 4 for the current seed production.