我国玉米生产一般应用杂交种。其优点是杂种优势强,田间生长整齐一致,产量高。但随之而来的是制种上的麻烦。杂交种制种时母本需要去雄,去雄不净则影响种子纯度,甚至造成制种工作的失败。我市玉米去雄时正值雨季给去雄工作带来困难。况且人工去雄需要较多的劳力和较大的劳动强度。利用雄性不育系进行不育化制种可免除人工 Corn hybrids are commonly used in China. The advantage is that heterosis is strong, field growth neat, high yield. But then comes the trouble of planting. Hybrids need to be emasculated when they are planted, and the purity of the seeds will not be affected if they are not mammoth, which may even lead to the failure of seed production. When the city’s maize went to war, the rainy season brought hardship to its work. Moreover, artificial removal of male need more labor and greater labor intensity. Male sterile lines can be used to eliminate infertility