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Protein Nutritional Value of Wheat and Triticale As Evaluated by Weanling Mice Bioassay¹

Experimental lines and cultivars of winter wheat (Triticum aestivum L.) and an experimental line of winter triticale (X Triticosecale), differing in the protein content of their grain, were subjected to mouse bioassay. Feeding efficiency ratios (FER) were computed from feed consumption and weight gain data from mice, fed diets containing equal amounts of grain of the test cultivars. Protein efficiency ratios (PER) were determined from weight gain and protein consumption data from mice fed diets containing equal amounts of protein from the test cultivars.

Lower percentages of wheat protein in the diets tended to reduce mouse weight gains and increase FER values. Test cultivars with the highest lysine/unit protein produced the highest PER values. The triticale line with high protein and higher lysine/unit protein than the wheat cultivars generally produced higher mouse weight gains and more favorable FER and PER values.

Key Words: Triticum aestivum L. • Protein content • Protein quality • Lysine • Amino acid

² Formerly research associate, U. of Nebr. (now geneticist, Anheuser-Busch, St. Louis, Mo.); professor, U. of Nebr.; research agronomist, ARS, USDA; and professor, U. of Nebr., Lincoln, respectively.

Received for publication November 1, 1974.