棉花是常异花授粉作物,容易自然杂交导致混杂退化。要保持优良品种的良好种性,就必须进行提纯复壮。我场对鄂光棉主要采用三年三圃制进行提纯复壮。下面谈谈我们的做法和体会。繁育方法我场进行棉花良种繁育,采取单株选择、分系比较、混合繁殖法,其程序是:第一年单株选择单株选择的好坏,直接影响原种的质量和工作量。单株选择得好,淘汰就少,一定要把这一基础工作抓好。首先要掌握好选择标准,入选单株必须符合该品种的典型性状。第二、最好在选择圃中进行选择,若未建立选 Cotton is often cross-pollination crops, easy to cross natural hybrid led to degradation. To maintain the good variety of fine varieties, it must be purified and rejuvenated. My field of E cotton is mainly used three years three Pu system purification and rejuvenation. Here to talk about our practices and experiences. Breeding methods I field cotton seed breeding, to choose a single plant, the Department of comparison, mixed breeding method, the program is: the first year of single plant selection of the quality of a direct impact on the quality and workload of the original species. Well-selected individual, eliminated less, we must do a good job of this basic work. First of all, to grasp the selection criteria, the selected individuals must meet the typical traits of the species. Second, it is best to choose between choices, if not established