近年来,在玉米育种工作中“群体改良”或“轮回选择”这一程序被提出来了。本讲就是谈谈有关玉米“群体改良”的一些基础理论知识和综合利用的方法,以供从事这一工作的同志参考。一、玉米“群体改良”的意义和作用(一)玉米“群体改良”的意义 In recent years, the procedure of “group improvement” or “reincarnation” has been put forward in the corn breeding work. This talk is to talk about some basic theoretical knowledge about maize “group improvement” and the method of comprehensive utilization for comrades engaged in this work for reference. First, the significance of corn “group improvement” and the role of (a) the significance of corn “group improvement”