3. maize (1 Main Quality Traits Normal maize Protein content±10% Amino acid constituents High lycine acid赖氨酸 content>3-4 Sweet maize/ultra-sweet maize Sugar content 10-15% Oil maize High Oil content: large embryo3. Maize （1）Main Quality Traits • Normal maize Protein content ±10% Amino acid constituents High lycine acid 赖氨酸 content > 3-4% • Sweet maize/ultra-sweet maize Sugar content 10-15% • Oil maize High Oil content: large embryo