国内外的研究结果证明,利用棉花杂种优势,一般可以提高产量20%左右,是增产的有效途径。但棉花是雌雄同花的常异花授粉作物,应用人工的方法获得棉花杂种种子,必须经过一整套烦琐的人工去雄授粉等制种过程,花费的人力较多,提高了杂种种子生产成本,给推广杂种优势增加了困难。应用棉花雄性不育系制种,因棉花已雄性不育,用不育系作母本,不仅可以省去人工去雄,若摸清了它的传粉媒介——昆虫,应用昆虫给棉花传粉,还可省去人工授粉工作,是利用杂种优势最理想的方法。棉花雄性不育系的研究,在我国已有了较大的进展,有的单位已获得较稳定的50%不育株, Research results at home and abroad show that the use of cotton heterosis, generally can increase the yield of about 20%, is an effective way to increase production. However, cotton is a monoecious cross-flowering pollination crop. Artificial methods are used to obtain cotton hybrid seeds, which must go through a set of cumbersome man-made pollination and other seed production processes, which requires more manpower and increases the production cost of hybrid seeds. To promote heterosis increased difficulties. Application of cotton male sterile lines of cotton, cotton has been male sterile, with sterile lines as the female parent, not only eliminates the need for male to male, if found its pollinator - insects, the application of insects to cotton pollination, Also can save artificial pollination, is the best way to use heterosis. The research on cotton male sterility has made great progress in our country. Some units have obtained more stable 50% sterile plants,