<;P>;PROBLEM TO BE SOLVED: To improve efficiency of breeding by shortening the time required for the breeding of a plant. <;P>;SOLUTION: The method for shortening the time for the breeding of the plant involves a step for grafting a nontransformed plant as a scion on a stock which is a transformed plant to which an FT gene is introduced, and a step for carrying out hybridization by using the scion. The kit for shortening the breeding of the plant has the transformed plant to which the FT gene is introduced. <;P>;COPYRIGHT: (C)2007,JPO&INPIT