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1 玉米制种技术的现状玉米杂交种的增产作用早已显为人知,因而如何配制优良单交组合,如何提高制种产量,长期以来受到广泛重视。杂交制种包括自交系的选育、繁殖、隔离制种等过程,我国刚开始搞杂交制种时,亩产只有50公斤左右,经不断的研究、技术改进,制种产量大幅度提高,目前技术先进的地区平均亩产可达250～300公斤,较落后地区制种产量也仍是100公斤左右。现在提高玉米制种产量的方法主要是增加母本株数和加强栽培管理。过去制种一般母本与父本的行比为3:1,现在多为5:1～6:1,有的甚
1 Maize seed production technology status Maize hybrids yield has long been known, so how to prepare good single cross combination, how to improve seed production, has long been widely valued. Hybrid seed production, including inbred lines breeding, breeding and isolation of seed production process, the beginning of China engage in hybrid seed production, only 50 kg per mu, after continuous research and technological improvements, seed production increased significantly, At present, the average yield per mu in the technologically advanced area is up to 250-300 kilograms, while the seed production in the more backward areas is still about 100 kilograms. Now increase the production of corn seed production method is to increase the number of female parent and strengthen the cultivation and management. In the past, the ratio of general mother to father was 3: 1, and now it is mostly 5: 1-6: 1