长期以来,我国的棉花良种繁殖方法都是采用株行圃、株系圃和原种圃3年三圃制,其后,有人曾改为二圃制,但仍不完善.本文提出一种新的良繁方法,供育种工作者和原种生产者参考。一、三圃制遗传基础的局限性三圃制是以单株选择为基础的一种改良混合选择法。由于棉花品种是经过多次杂交组合选育而成,其遗传基础比较复杂,加上它是一种常异交作物,天然杂交的机会较多,一般变异性较大,易受 For a long time, all the breeding methods of cotton varieties in our country have adopted the system of three-year plantations of plant nursery, plant nursery and original nursery. Later, some people changed to two nursery, but still not perfect. For the breeders and breeding producers reference. First, the limitations of the genetic basis of three nursery Three nursery is based on the selection of a single plant improved hybrid selection method. Because the cotton variety is selected and breed through multiple hybrid combinations, its genetic basis is rather complicated. In addition, it is a kind of often outcrossing crop. There are many opportunities for natural hybridization, and the general variability is large and vulnerable