THE interest in the nutritive value of corn was increased when Mertz et al. (1964) announced that the mutant opaque-2 gene caused a marked alteration of the amino acid content of corn endosperm protein, thereby improving its nutritional quality. Opaque-2 corn has been shown to have a higher nutritional value than normal corn for the rat (Mertz et al., 1965; and Mertz, 1966), pig (Cromwell et al., 1967a, c, 1968; and Klein et al., 1967), chick (Cromwell et al, 1967b, 1968) and human (Bressani, 1966; and Clark, 1966). The purpose of this work was to investigate that nutritional quality of opaque-2 corn for the laying hen. EXPERIMENTAL PROCEDURE Two experiments were conducted to study the nutritional value of a high protein opaque-2 corn (Experiment 1) and opaque-2 corn (Experiment 2) in laying hen diets. The high protein opaque-2 corn was obtained by crossing the W64A (O2/O2) inbred strain with Illinois. . .
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Fonseca et al. (1970) studied this question.
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