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利用雄性不育系杂交种繁殖制种时可以免除人工去雄,降低种子生产成本,减少生物学混杂,提高种子质量,是实现玉米种子生产现代化的一项重要措施。 美国在七十年代初,因小斑病T小种暴发为害而停止使用T型细胞质杂交种之后,旋即在生产上利用第二代的新细胞质类型的玉米雄性不育系杂交种。据Zuber和Darrah报告,1979年美国各类细胞质雄性不育系杂交种的比重已占17.9％。据刘纪麟赴美考察,1983年美国玉米生产中雄性不育系杂交种的比重已超过25％,主要是C型细胞质,其次是S组细胞质,还有少数其它类型细胞质。
It is an important measure to realize the modernization of corn seed production by eliminating male sterility, reducing the cost of seed production, reducing the biological mixture and improving the seed quality when breeding hybrids of male sterile lines. In the early 1970s, the United States stopped using T-type cytoplasmic hybrids due to the outbreak of the small spot disease T-races and immediately took advantage of the second generation of new cytoplasmic maize male sterile line hybrids in production. According to Zuber and Darrah, in 1979, the proportion of various cytoplasmic male sterile line hybrids in the United States accounted for 17.9%. According to Liu Jilian’s visit to the United States, in 1983, the proportion of male sterile line hybrids in the U.S. maize production exceeded 25%, mainly C-type cytoplasm, followed by S-type cytoplasm and a few other types of cytoplasm.