1. Nutritional evaluation of genetically modified maize corn performed on rats.
- Author
-
Chrenková M, Sommer A, Ceresnáková Z, Nitrayová S, and Prostredná M
- Subjects
- Amino Acids analysis, Amino Acids metabolism, Animal Nutritional Physiological Phenomena, Animals, Dietary Fiber analysis, Dietary Fiber metabolism, Dietary Proteins analysis, Dietary Proteins metabolism, Digestion, Drug Resistance genetics, Fatty Acids analysis, Fatty Acids metabolism, Glycine pharmacology, Herbicides pharmacology, Nutritive Value, Plants, Genetically Modified drug effects, Plants, Genetically Modified genetics, Rats, Rats, Wistar, Zea mays drug effects, Zea mays genetics, Glyphosate, Animal Feed analysis, Dietary Proteins administration & dosage, Glycine analogs & derivatives, Nitrogen metabolism, Plants, Genetically Modified chemistry, Zea mays chemistry
- Abstract
The aim of this study was to determine the composition and nutritional value of conventional and transgenic, so-called Roundup Ready (RR) maize with an introduced gene of glyphosate resistance. Crude protein, crude fibre, ash, fat, starch, sugar, amino acids, fatty acid and macroelement levels were determined by chemical analysis. In both maize lines a low level of Ca (0.15 g.kg-1 DM) and of the essential amino acids lysine and tryptophan (2.6 and 1.7 g.kg-1 DM, respectively) were observed. In the biological experiment carried out on rats the tested maize lines were the only dietary sources of nitrogen, thus, the experimental diets contained 9% CP in dietary dry matter. In the feeding experiment no significant differences in the protein efficiency ratio (PER) were observed between groups receiving conventional or transgenic maize (1.51 and 1.41, respectively). Also almost equal results were obtained in the balance experiments. Both maize lines revealed a high nitrogen digestibility (84.9 and 84.5%, respectively) and the net protein utilization amounted to 63.5 and 63.2%, respectively. From these results can be concluded that regarding nutrient composition and utilisation, genetically modified (RR) maize is equivalent to isogenic maize.
- Published
- 2002
- Full Text
- View/download PDF