Comparative analysis of nutritional composition between the disease-resistant rice variety OsCK1 and conventional comparators

The disease-resistant OsCK1 ( Oryza sativa L. cv. Nakdong) was developed in Korea by inserting a choline kinase ( CK1 ) gene into the rice genome. The key nutrients and anti-nutrients of OsCK1 were analyzed and compared with those of its non-transgenic counterpart and four commercial cultivars grown together at two different locations. The levels of proximates, amino acids, fatty acids, minerals, vitamins, trypsin inhibitors, and phytic acid in OsCK1 were comparable to those of its parent rice and the commercial rice varieties. The results of principal component analysis performed using quantification data from 47 nutritional components revealed differences among the rice samples according to their growing locations rather than by their genotypes. These results confirm that the nutritional quality of rice grains was not affected by the insertion of the CK1 gene and suggest that the quality is more affected by environmental factors such as growing conditions than by genetic factors.