<;P>;PROBLEM TO BE SOLVED: To provide a flo 2 mutant obtained by utilizing gene recombination, to provide a method for producing a low-allergen plant, and to provide a marker for identifying the flo 2 mutant and the low-allergen plant. <;P>;SOLUTION: The method for producing a plant where the function of floury-2 gene is specifically lowered is provided. Besides, the flo 2 mutant and the low-allergen plant can be identified by detecting a floury-2 gene-related substance. <;P>;COPYRIGHT: (C)2007,JPO&INPIT