我国人多地少,粮棉争地矛盾突出,用占世界7%的耕地,养活占世界22%的人口,棉花必须让地于粮.黄淮海地区以粮为主,同时棉区西移,但西移后北疆和南疆部分棉区无霜期较短,黄萎病有蔓延的趋势,部分地方棉花因病减产甚至绝产.为解决以上问题,选育早熟、高产、抗病的短季棉换代品种是当务之急,具有十分重要的意义. With more people and less land, the conflict between grain and cotton is striking. With 7% of the world's cultivated land and 22% of the world's population living in the world, cotton must be given ground to grain. However, after the westward movement, the frost-free period in the northern and southern parts of the cotton area is short, and the growth of Verticillium wilt has the tendency of spreading. In some areas, the cotton production is even reduced due to the disease. In order to solve the above problems, the early-maturing, high yield and disease- Cotton varieties is a top priority, has very important significance.