棉花是常异花授粉作物,品种群体的遗传基础复杂,棉花的经济性状受环境因素的影响较大,在大田连年种植易发生混杂退化,造成产量下降,纤维品质变劣。由于原棉质量的高低,直接关系到最终产品质量的高低。提高棉花质量不仅是纺织工业的需要,也是提高棉花市场竞争力的需要。因此,棉花生产急需转 Cotton is an evergreen pollination crop. The genetic base of varieties is complex. The economic traits of cotton are greatly influenced by environmental factors. In cotton fields, successive planting in the field is prone to be mixed and degenerated, resulting in the decline of yield and deterioration of fiber quality. Due to the quality of raw cotton, the quality of the final product is directly related to the level of quality. To improve the quality of cotton is not only the needs of the textile industry, but also the need to improve the cotton market competitiveness. Therefore, cotton production in urgent need of transfer