PROBLEM TO BE SOLVED: To provide a new method for accelerating generation of soybean. SOLUTION: Total RNA is extracted from a proliferated host infected with a recombinant apple latent spherical virus (FT-ALSV) expressing FT gene of Arabidopsis thaliana, and the RNA is inoculated to a cotyledon of a VE-stage soybean sprout by using a particle gun method. COPYRIGHT: (C)2011,JPO&INPIT