Plant tillering related protein and coding gene thereof

The invention discloses plant tillering related protein and a coding gene thereof. The protein is protein (a) or protein (b), wherein the protein (a) has amino acid sequences shown as a sequence 2 in a sequence table; and the protein (b) has an amino acid residue sequence which is derived from the sequence 2 in the sequence table by substituting and/or losing and/or adding one or more amino acid residues and has the same function. The experiment proves that expression vectors are inserted into an OsMADS57 gene which is cloned in japonica rice zhonghua 10 in forward and reverse directions so as to obtain plus sense recombinant plasmid and antisense recombinant plasmid; the plus sense recombinant plasmid and the antisense recombinant plasmid are imported into the japonica rice zhonghua 10 so as to obtain plus sense transgenic rice strains and antisense transgenic rice strains; and compared with that of wild-type rice, the tillering of the plus sense transgenic rice strains is increased, and the tillering of the plus sense transgenic rice strains is decreased.