Comparison of the nutritional profile of GM maize MON 89034 x NK603 and conventional maize
2012
Polačiková, Mária (Animal Production Research Centre Nitra, Lužianky (Slovak Republic)) | Chrenková, Mária (Animal Production Research Centre Nitra, Lužianky (Slovak Republic)) | Formelová, Zuzana (Animal Production Research Centre Nitra, Lužianky (Slovak Republic)) | Chrastinová, Ľubica (Animal Production Research Centre Nitra, Lužianky (Slovak Republic)) | Pomikalová, Silvia (Animal Production Research Centre Nitra, Lužianky (Slovak Republic))
Genetically modified (GM) crops, which have been developed, offer a wide variety of benefits to producers including resistance to insects, diseases and herbicides. The aim of this study was to determine the composition and nutritional value of genetically modified maize (MON 89034 x NK 603), isogenic maize (DKC 5143) and three reference hybrids of maize growing on allotment in CVRV Piešťany. GM maize MON 89034 × NK603 was produced by crossing of two genetically modified parental lines MON 89034 and NK603. Like MON 89034, MON 89034 × NK603 produces the Cry1A.105 and Cry2Ab2 insecticidal proteins, which impart protection against damage caused by the European corn borer (ECB, Ostrinia nubilalis) and other lepidopteran insect pests. Like NK603, MON 89034 x NK603 expresses the CP4 EPSPS proteins, derived from Agrobacterium sp. strain CP4, which provides tolerance to glyphosate. Samples were analysed for dry matter, crude protein, crude fibre, ash, fat, starch, sugar, amino acid, macro and microelements, mycotoxines, in sacco crude protein (CP) degradability and intestinal digestibility (using mobil bag technique). All tested samples of maize had similar chemical composition, a low level of Ca (0.10 - 0.16 g·kg-1 DM) and the essential amino acid lysine (2.05 - 2.74 g·kg-1 DM) were observed. Increased content of mycotoxins was observed only in a conventional maize (Zearalenone 43 μg.kg-1, Deoxyvalenol 339 μg.kg-1). GM and isogenic maize were equal in effective crude protein degradability (59.57% and 58.74%) and in intestinal digestibility (94.42% and 94.21%). The results of compositional analyses demonstrated that the grain of maize MON 89034 x NK603 is comparable in composition with those of the isogenic control and conventional maize.
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