An objective of the present invention is to provide methods for accumulating in rice seeds a partial peptide of a mite antigen protein comprising several T cell epitopes, or a mite antigen peptide that has been modified to not form a conformation to be recognized as an antigen, and plants which have accumulated these peptides. To achieve the above objective, the present inventors have tried to generate seeds (rice) of rice plants that have accumulated mite antigen peptide variants. As a result, the present inventors developed genetically modified rice plants which express and accumulate these mite antigen peptide variants, and demonstrated their effect on asthma, in particular, by orally feeding mice with these variants to induce immunological tolerance, thereby completing the present invention.
