Effects of Stay-green Rice Gene (SGR) Over-expression and Mutation on Some Indexes Related with Carbon and Nitrogen Metabolism in Rice Leaves Effects of Stay-green Rice Gene (SGR) Mutation and Overexpression on the Protein Degradation in Thylakoid of Rice Leaves Establishing a Gene Trap System Mediated by T-DNA(GUS) in Rice ANALYSIS OF GENE EFFECTS OF QUANTITATIVE CHARACTERS IN RICE