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在玉米制种工作中，发现有些自交系如“４７８”、“８１１２”等，在雄穗还没有完全抽出苞叶或刚刚露出顶叶时就开始散粉，往往人未觉察散粉已经开始，按常规去雄很难保证去雄及时、干净、彻底，难以保证杂交制种质量。只有采取超前去雄技术，做到“去雄不见雄”，“雌雄不见?
In the work of seed production of corn, some inbred lines such as “478”, “8112”, etc. are found. When the tassel has not completely extracted the husk or just revealed the parietal lobe, the loose powder begins to be noticed. It is difficult to ensure that regular male sterility is eliminated in a timely, clean and thorough manner, thus making it difficult to ensure the quality of hybrid seed production. Only to take the technology to advance to the male, so that “male to male”, "male or female?