Abstract
The incorporation of the opaque-2 gene into local maize hybrids results in an increase in the levels of lysine and tryptophan and an improved biological value. The average weight gain of rats fed diets containing opaque-2 maize, normal maize and normal maize supplemented with synthetic lysine was 22·6 g, 12·2 g and 18·4 g respectively. Using other parameters: Efficiency of Food Conversion (EFC), Net Protein Utilisation (NPU), Protein Efficiency Ratio (PER) and Biological Value (BV), opaque-2 hybrid was superior to normal maize or normal maize supplemented with lysine. Supplementation of opaque-2 maize with lysine alone had no added beneficial effect but supplementation of normal maize with lysine and tryptophan gave an additional improvement in its biological value.
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