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迄今为止,国内外尚未找到棉花一年繁育多代,及早稳定杂种后代性状的方法。如采用常规育种方法,在田间一年种植一代,其后代遗传性状的稳定,一般需要7—9年。利用温室或南繁,一年两代,也需4年才能使杂种后代的性状稳定。我所于1977年试验采用幼胚离体培养为主,以温室和大田相结合,一年繁殖3—4代,两年繁殖6—8代,基本获得了成功。本试验的主要措施如下:
So far, no method has been found at home and abroad to breed cotton for many generations a year and stabilize the trait of hybrid offspring as early as possible. Such as the use of conventional breeding methods, planting a generation a year in the field, the genetic stability of their offspring, generally takes 7-9 years. The use of the greenhouse or South Fan, one year and two generations, also need 4 years to make the characteristics of hybrid offspring stable. My experiment in 1977, the use of immature embryos in vitro-based, with greenhouse and field combined 3-4 years of breeding a year, two years breeding 6-8 generations, the basic success. The main measures of this test are as follows: