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近年来,由于优良杂交种的推广应用,我省玉米单产不断提高。全省玉米种植面积约2500万亩以上,如按每亩用种四斤计算,每年要生产一亿多斤种子,这就需要50万亩以上的制种田。这样大面积的制种田,依靠人工进行母本去雄,不仅耗费大量劳力,而且常不能按规定的标准完成去雄作业,降低制种质量,影响杂交种的增产效果。利用雄花不育系,实行不育化制种,可克服以上不足之处。一、推广不育化制种的条件能否推行不育化制种,决定于以下几个条件:1、必须“三系”配套:即不育系、保持系和恢复系必须配套,这是不育化制种的物质基础和先决条件。
In recent years, due to the popularization and application of excellent hybrids, corn yield in our province has been continuously improved. The province’s corn acreage of about 25 million mu, such as planting 4 mu per acre basis, each year to produce 100 million kilos of seeds, which requires more than 500,000 mu of farming. Such a large area of farming, relying on artificial mother to male, not only labor-intensive, but often can not be completed according to the prescribed standards to maneuver, reduce seed quality, affect the yield of hybrids. The use of male sterile lines, the implementation of sterile seed production, can overcome the above deficiencies. First, the promotion of sterile seed production conditions Whether the introduction of infertility seed production, determined by the following conditions: 1, must be “three lines” supporting: that is, sterile lines, maintenance and restoration of the Department must be supporting this is Material basis and preconditions for sterile seed production.