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Evaluation of Nutritional Equivalency of Corn Grain from DAS-Ø15Ø7-1 (Herculex* I) in the Diets of Laying Hens¹

S. E. Scheideler^*,2, D. Rice, B. Smith, G. Dana and T. Sauber

^* Department of Animal Science, University of Nebraska, PO Box 830908, Lincoln, NE 68583-0908; and Pioneer Hi-Bred International, 7100 N. W. 62nd Ave., PO Box 1100, Johnston, IA 50131

Correspondence: ² Corresponding author: sscheideler1{at}unl.edu

Grain from transgenic corn line TC1507 (Herculex* I) from Pioneer Hi-Bred International Inc. and Dow AgroSciences LLC, which expresses the Cry1F protein from Bacillus thuringiensis to provide protection from lepidopteran pests of corn, was compared with its isoline equivalent and 2 conventional corn strains in a 16-wk laying hen feeding trial. Egg production and production efficiency of hens fed the diet formulated with transgenic grain TC1507 were similar to those of hens fed diets formulated with isoline or nontransgenic conventional corns. Hens fed TC1507 had similar egg qualities as those fed nontransgenic grain diets. Diet x phase interactions were noted for Haugh unit and Roche color fan score. Hens fed conventional corn 2 had a poorer Haugh unit score compared with hens fed the other 3 diets. Conventional corn 1 had greater levels of xanthophylls compared with the other corn treatments, resulting in increased Roche color fan score for eggs produced by hens fed this diet. Overall, hens fed the transgenic Herculex* I corn grain containing the Cry1F protein performed as well as hens fed the isoline equivalent of Herculex* I and hens fed the conventional corn grains.

Key Words: Herculex* I transgenic corn • laying hen • Cry1F protein • corn

¹ Herculex* I Insect Protection by Dow AgroSciences and Pioneer Hi-Bred. Herculex is a registered trademark of Dow Agro-Sciences LLC.