Rice grain shape protein and encoding gene and application thereof

The invention provides rice Os01g66970.1 protein and encoding gene and application thereof. The protein has an amino acid sequence as shown in SEQ ID NO.2, or an amino acid sequence which has the samefunction and is formed by substitution, missing or addition of one or more amino acid residues of amino acid sequence as shown in SEQ ID NO.2; the encoding gene has a nucleotide sequence as shown inSEQ ID NO.1, or a nucleotide sequence hybridized with the nucleotide sequence as shown in SEQ ID NO.1. The invention also discloses a method for breeding large-grain rice variety by using such gene. Namely, the gene is edited by a gene editing method, so as to obtain the large-grain rice variety; secondarily, the regulation effect of a grain type regulation gene is good, and compared with the prior art, the rice grain length is obviously increased, so that the rice productivity can be remarkably increased, and the gene has wide application prospects in rice heterosis utilization. 本发明提供了水稻Os01g66970.1蛋白及其编码基因与应用，该蛋白具有如S