GENETICALLY MODIFIED MAIZE IN MODEL NUTRITION

MARIA CHRENKOVÁ, L’UBICA CHRASTINOVÁ, ANDREA LAUKOVÁ, MARIA POLÁÈIKOVÁ, ZUZANA FORMELOVÁ, VIOLA STROMPFOVÁ, L’UBOMIR ONDRUŠKA, VLADIMIR PARKÁNYI, JAN RAFAY, IVETA PLACHÁ, RENATA SZABÓOVÁ

Abstract: The objective of this work was to determine the effect of genetically modified Bt maize (MON 88017) in animal nutrition. Bt maize was tested in two experiments and two animal spieces. In the first Bt maize was included in rabbit (12%) and in the second in Japanese quail (40%) diets. We compared and observed the influence of Bt maize and isogenic maize on live weight growth, feed conversion and health status, digestibility of nutrients, biochemical and mineral parameters in blood and meat quality of the tested animals. We evaluated the egg performance of the meat type and of the three laying hybrids of Japanese quail during 12 months of laying period (100 Japanese quails in total) from the 58th week of layers age. We evaluated 20 traits in total. Weight of eggs, egg-white and yolk was higher in meat line compared with those of eggs from quails of laying type, however, weight of shell was higher in the laying lines. As far as the proportion of individual components in egg is concerned, higher proportion of white and lower proportion of yolk and shell out of the egg weight were found in meat quails compared with laying quails. For the test of meat production the slaughtering was made at the quail age of 7 weeks. The quails had a very well developed breast part reached in the mentioned time more than 30% of the males’ carcass yield. Also the technological quality and
nutritive value of quail meat is very high. In the rabbit part of the experiment were tested complete feed mixtures with 12 % proportion of Bt (MON 88017) and isogenic maize (DKC5143) on 48 broiler rabbits (Hycola). Significant differences between Bt and isogenic maize were not recorded in any of the observed
parameters. In the experiment with Japanese quails 40 % of Bt maize were included into an experimental diet and this experimental group was compared with the control group with diet with 40% ration of isogenic maize. The results of this experiment showed that the incorporation of Bt maize had not significant influence on the followed parameters of Japanese quails.

Keywords: biochemical and mineral parameters in blood; Bt maize (MON 80817) Japanese quail; nutrients in meat; quality of eggs; rabbit

Date published: 2023-01-24