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Natural Dietary Selenium, -Tocopherol and Effect on Tissue Selenium¹

Michigan State University, East Lansing 48823

Abstract

Pork chops from two to four pigs were collected by cooperators at each of 13 locations in the United States along with a sample of the diet these pigs received from approximately 50 kg body weight to market. The longissimus muscles were analyzed for their selenium concentration, and the diets were analyzed for selenium and -tocopherol. The states of origin, selenium concentrations (ppm, air dry) of the diets and of the longissimus muscles (ppm, wet basis) were as follows: Arkansas, 0.152, 0.213; Idaho, 0.086, 0.111; Illinois, 0.036, 0.059; Indiana, 0.052, 0.063; Iowa, 0.235, 0.278; Michigan, 0.040, 0.052; Nebraska, 0.330, 0.313; New York, 0.036, 0.046; North Dakota, 0.412, 0.386; South Dakota, 0.493, 0.521; Virginia, 0.027, 0.034; Wisconsin, 0.178, 0.125; and Wyoming, 0.158, 0.311. A significant (P<.01) linear correlation of 0.95 was established between dietary selenium and tissue selenium concentration. No relationship was apparent between -tocopherol concentration and tissue selenium.

¹ Contribution of the Department of Animal Husbandry. Published with the approval of the Director of the Michigan Agricultural Experiment Station as Journal Article No. 5572. Supported in part by the Moorman Mfg. Co., Quincy, Illinois, Eastman Chemical Products, Kingsport, Tennessee and the National Feed Ingredients Association, Des Moines, Iowa.

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