Breeding method for rapidly stabilizing distant filial generation of cotton

The invention discloses a breeding method for rapidly stabilizing distant filial generation of cotton. Belongs to the technical field of plant breeding. According to the method, on the basis of an F1-generation sea-land hybrid material obtained by hybridizing VSG (sea island cotton semi-matching material) serving as a female parent and a common upland cotton material serving as a male parent, a 0.03-0.05% colchicine aqueous solution is used for treating F1-generation young bolls, and an F2-generation is induced to separate a stable intermediate material or new variety with excellent genes of sea island cotton and upland cotton; therefore, a new cotton germplasm resource is created. The main innovation point of the method is that the previous treatment part and method of colchicine on cotton plants are changed, the previous doubling objects are haploids induced by hybridizing cotton semi-matching materials serving as female parents with sea-land hybrid low-generation materials, and the method is not limited by