COMPARISON OF EFFECTS OF DIETARY OLIVE OIL, TALLOW AND VITAMIN-E ON THE QUALITY OF BROILER MEAT AND MEAT-PRODUCTS

1. The effect of dietary fat and vitamin E supplementation on quality attributes (drip loss, oxidative stability, sensory quality) in chicke n meat and meat products was investigated. Broiler chicks were fed on diets containing tallow (60 g/kg) or olive oil (60 g/kg) at a basal (3 0 mg/kg diet) or supplemental (200 mg/kg diet) concentration of alpha- tocapheryl acetate for 8 weeks. The alpha-tocopherol content and fatty acid composition of breast and thigh meat was determined. Drip loss w as determined in breast fillets. Lipid oxidation (thiobarbituric acid- reacting substances/TBARS) and sensory quality (warmed-over flavour de velopment/WOF) were assessed in minced thigh meat during storage. 2. D ietary olive oil increased the ratio of monounsaturated to saturated f atty acids (MUFA/SFA) in the diets. In breast and thigh, this resulted in approximately a two-fold increase in the MUFA/SFA ratio. Supplemen tal alpha-tocopherol increased the alpha-tocopherol content of muscles . 3. Dietary fat did not influence drip loss in thawed breast fillets during refrigerated storage, but supplemental alpha-tocopherol reduced drip loss. 4. TBARS and WOF development in minced thigh meat patties were also reduced by supplemental alpha-tocopherol following frozen st orage, or cooking and refrigerated storage. Storage stability was not adversely affected by dietary fat. 5. Overall, the results showed that increasing the monounsaturated profile of chicken meat lipids did not adversely affect quality characteristics. Dietary alpha-tocopherol su pplementation was a more important factor in the determination of broi ler meat quality.