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Fatty acid profile of breast muscle of broiler chickens fed diets with different levels of selenium and vitamin E*
*The experiment was partly financed by EUREKA project No. E!4478
Summary
An experiment with broiler chickens was established to verify an assumption that an increased content of antioxidants in a diet affects the ratio of unsaturated fatty acids in muscle tissues of broiler chickens. The fatty acid profile was analysed in fat of breast muscles of 10 broiler chickens from 5 experimental groups that for 5 weeks were administered feed mixtures differing only in the addition of selenium and vitamin E, i.e. 0.15 or 50 mg/kg and from 40 to 200 mg/kg, respectively. In the basal diet, fatty acids derived from soybean oil (5.40%) and major dietary components: wheat (45.7%), corn (15%) and fish meal (3.0%).
The different levels of selenium and vitamin E applied in the feed mixtures were found not to affect the final bodyweight of the chickens, but to increase contents of both antioxidants in their breast muscle, i.e. in the case of selenium - from 0.05 mg/kg to 0.08 mg/kg, and in the case of vitamin E - from 3.12 to as much as 14.97 mg/kg. Fat of the breast muscle was demonstrated to contain a relatively high content of PUFA n-3 (4.84-5.25%), including C20:4n3, C20:5n3, C22:5n3and C22:6n3fatty acids originating from fish meal. In turn, no differences were reported in the fatty acid profile of fat of the breast muscle of broiler chickens as affected by selenium and vitamin E levels in the muscle.
Keywords/Stichworte:Broiler; breast muscle; fatty acid; vitamin E; selenium
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