Fecha de publicación: -- Fuente: WIPO "tomato" A mutated br2 protein is provided, where a CDS sequence and a 3'UTR sequence of the mutated br2 protein include base deletions relative to a CDS sequence and a 3'UTR sequence of a parental br2 protein, where the parental br2 protein is derived from maize. The mutated br2 protein leads to reduced plant height and ear height, improved lodging resistance, and increased yield under high-density planting conditions in maize, and has important application value in maize dwarfing breeding.