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Published in Crop Sci 11:339-340 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Nutritive Value of the Protein in High-oil Selections in Maize

C. F. Genter and K. W. King2

Inbred lines were developed by continuous selfing and simultaneous selection for high protein and high oil content of the grain of corn (Zea mays L.). Grain of sixth generation inbred lines was analyzed and then composited to represent the four possible combinations of high and low oil and protein. A feeding trial was conducted with rats to evaluate the nutritional value of the protein of the composite samples.

Protein digestibility of all four composites was lower than that of a field maize sample included as a reference, and the protein digestibility of the two high-protein composites was lowest of all. The protein efficiency ratio was lowest for the high-protein — high-oil composite. Thus, no practical improvement in the nutritive value of the protein could be determined.

Key Words: Protein utilization • Rat feeding

2 Respectively, Professor of Agronomy, Virginia Polytechnic Institute and State University, and Assistant Vice President, Research Corporation, New York, New York (formerly Head, Department of Biochemistry and Nutrition, Virginia Polytechnic Institute and State University). The feeding trials were conducted by Kosol Sirinit, formerly Graduate Assistant, Department of Biochemistry and Nutrition, Virginia Polytechnic Institute and State University and presently Major, Research and Development Division, Army Quartermaster Department, Bangto, Bangkok, Thailand.

Received for publication November 7, 1970.




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