１９９８年夏季，在西瓜新品种５５０８的栽培示范田中，发现了１株具备明显叶片后绿性状的突变株。该突变株的幼茎、叶等嫩组织或器官均呈黄白色，老茎、叶等依次转为黄绿色并能正常开花结瓜，遂将其自交留种。当年秋季，随机取其自交瓜部分种子进行种植观察，发现其后代分离? In the summer of 1998, a mutant strain with obvious green leaf shape was found in cultivated demonstration field of new watermelon variety 5508. The mutant strains of young stems, leaves and other tender tissues or organs were yellow-white, the old stems, leaves, turn yellow-green and turn the normal flowering knot, then the selfing seed. In the fall, they were randomly picked from the seeds of some self-made melon planting observation, found that their offspring separation?