J. Anim Sci.
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J. Anim Sci. 1970. 31:509-517.
© 1970 American Society of Animal Science
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Nutritive Value of High Lysine Corn: Deficiencies and Availabilities of Lysine and Isoleucine for Growing Swine1

R. I. Pick2 and R. J. Meade

University of Minnesota, St. Paul

Abstract

SINCE the discovery that corn homozygous for the mutant gene, Opaque-2, was exceptionally high in lysine (Mertz, Bates and Nelson, 1964), many investigators have studied the nutritional quality of such corn. Likewise, there has been keen interest in incorporating the Opaque-2 gene into conventional hybrid corns.

Cromwell, Pickett and Beeson (1967) attributed the nutritional superiority of Opaque-2 corn for growing swine to greater contents of lysine and tryptophan than found in normal corn. In a subsequent study, greater nitrogen retention was achieved in growing swine fed Opaque-2 corn compared with normal corn (Cromwell et al., 1969). Jensen et al. (1969) found that the amino acid pattern of Opaque-2 corn was apparently superior to that of a conventional hybrid corn for finishing swine. Drews et al. (1969) reported that 25-day old pigs gained more rapidly and efficiently when fed Opaque-2 corn than did similar pigs fed normal corn; approximately 5% less soybean meal was required in the total diet to supplement Opaque-2 corn to effect maximum performance of pigs.

Footnotes

1 Paper No. 7151, Scientific Journal Series of the Minnesota Agricultural Experiment Station.

2 NIH Trainee in Nutrition; supported by NIH Training Grant GMO 1041 from National Institute of General Medical Science; Present address: Research Nutritionist, Walnut Grove Products, Inc., Walnut Grove, Iowa.






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