我国玉米雄性不育利用现状和今后发展意见

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我国是世界上第二个玉米生产大国,1983年播种面积达2.82亿亩,每年的制种面积估计在400~500万亩左右。制种田基本上依靠人工去雄,耗费大量劳动力,较难以保证去雄质量,配出的杂交种有的不能起到应有的增产作用,迫切需要大力推广雄性不育的利用。 一、主要不育胞质类型和特点
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