尽管玉米籽粒较其它禾谷作物具有较高的蛋白质含量,但由于缺乏赖氨酸和色氨酸,在食物里没有其它赖氨酸和色氨酸来源的情况下,人类及其它哺乳类动物只能吸收其一半左右的蛋白质。自1960年首次发现高赖氨酸玉米突变基因Opaque-2后,高赖氨酸玉米育种便引起了世界范围内的广泛兴 Although maize grains have higher protein content than other cereal crops, due to the lack of lysine and tryptophan, in the absence of other sources of lysine and tryptophan in the food, humans and other mammalian animals Can absorb about half of its protein. Since the discovery of Opaque-2, a high-lysine mutant of maize, for the first time in 1960, breeding of high-lysine maize has led to widespread worldwide breeding