甜玉米原产于美国。本世纪40年代，由于甜玉米杂交种的问世，才得已大量栽培。目前，甜玉米在世界上的种植面积已达400多公顷，其中美国种植面积最大，其次是加拿大、新西兰、日本、泰国等。世界各国的甜了米育种，以美国开展较早，而且水平较高。我国的甜玉米育种起步较晚，但 Sweet corn native to the United States. The 40s of this century, due to the advent of sweet corn hybrids, have been cultivated in large quantities. At present, the planting area of ​​sweet corn in the world has reached more than 400 hectares, of which the United States has the largest planting area, followed by Canada, New Zealand, Japan and Thailand. Sweet rice breeding in various countries of the world started earlier in the United States and was at a higher level. China’s sweet corn breeding started later, however