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一、提高水稻品质的育种目标目前,一般栽培水稻品种,旦白质含量只6-8％,仅为大豆旦白质的1/5左右,比玉米、高梁低8～4％,比小麦、大麦低4-5％。稻米旦白质含量虽低,但就品质而言,却比小麦、玉米显著优越。这主要是因为它的氨基酸组成比较平衡,人体所必需的氨基酸,如赖氨酸、苏氨酸等含量较多。如赖氨酸在稻米旦白质中的含量为4％,在各种谷物中居于前列,这是稻米旦白质的突出优点。据分析其营养价值与大豆旦白质相当,也与牛肉旦白质相近似。因此,改良水稻品质的重点是在尽量不改变其原有氨基酸组成的情况下,尽力提高其旦白质含量。
First, to improve the quality of rice breeding objectives At present, the general cultivation of rice varieties, the protein content of only 6-8%, only about 1/5 of soybean protein, corn, sorghum 8 to 4% lower than wheat, barley low 4-5%. Although the content of rice protein is low, but in terms of quality, but significantly better than wheat, corn. This is mainly because of its relatively balanced amino acid composition, the human body essential amino acids, such as lysine, threonine and other content more. Such as lysine lysine in rice protein content of 4%, among the various grains in the forefront, which is a prominent advantage of rice protein. According to the analysis of its nutritional value and soybean protein equivalent, but also similar to the protein with beef. Therefore, the key to improving rice quality is to try its best to improve its protein content without changing its original amino acid composition.