以我国自己转育成的甜玉米新种质为材料，研究甜玉米的生化成分、优势率和遗传控制。研究结果表明，（１）甜玉米新种质各种生化成分与原始基因型接近，营养价值高，食味品质好；（２）甜玉米品质性状优势率以负（向）优势为主，明显不同于生长势性状的优势率；（３）普甜、甜脆、超甜玉米籽粒外观性状和糖分含量均受其各自的一对隐性基因控制 The new sweet corn germplasm which was transplanted into China was used as material to study the biochemical composition, dominance rate and genetic control of sweet corn. The results showed that: (1) The biochemical components of new sweet corn germplasm were similar to the original genotypes, with high nutritional value and good eating quality. (2) The dominant quality traits of sweet corn were mainly negative and predominant (3) The appearance traits and sugar content of Pu-sweet, sweet-brittle and super sweet corn were all controlled by a pair of recessive genes