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一、前言 利用玉米雄性不育系配制杂交种子,可以免除人工去雄,减少生物学混杂,提高种子质量,是玉米种子生产现代化的一项重要措施。当农村实行联产承包责任制后,在玉米大面积集中制种时,母本去雄不及时,不彻底,已成为影响种子质量的突出问题。因此,各地对利用玉米雄性不育系制种的要求日益迫切。据考察,1985年全国利用玉米雄性不育系制种的面积已达3.5万亩左右,湖北、四川、河南、山东、辽宁、黑龙江等省均已开始利用玉米雄性不育系进行大面积繁殖制种,1986年利用玉米雄性不育系杂交种的面积及其繁殖制种面积都将有较大的发
I. Preface The use of maize male sterile lines for the preparation of hybrid seeds can eliminate the need for artificial debridement, reduce the biological mixture and improve the quality of seeds. It is an important measure to modernize the production of maize seeds. When implementing the contract responsibility system in rural areas, when maize is planted in a large area, it becomes an outstanding problem that affects the quality of the seeds. Therefore, the requirement of using maize male sterile lines for seed production is increasingly urgent. According to the survey, in 1985, the area of seed production using maize male sterile lines in China reached 35,000 mu. Hubei, Sichuan, Henan, Shandong, Liaoning, Heilongjiang and other provinces have begun to use maize male sterile lines for large-scale breeding In 1986, the area of maize hybrid CMS and its breeding area will be larger