Effects of dietary oil blend on fatty acid composition, oxidative stability and physicochemical properties of longissimus thoracis et lumborum muscle in goats
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Date
2017
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Journal ISSN
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Publisher
Wiley and Sons
Abstract
This study examined the effects of dietary blend of 80%canola oil and 20%palmoil (BCPO) on the physicochemical properties,
antioxidant status, oxidative stability and fatty acid composition of Longissimus thoracis et lumborum (LTL) muscle from goats
during chill storage. Over a 14-week feeding trial, 24 Boer bucks were randomly assigned to and supplemented with diets
containing 0, 4 or 8%BCPO on a dry matter basis, slaughtered and the LTL was subjected to a 7 day chill storage. Neither diet
nor post mortem ageing influenced (P>0.05) antioxidant enzyme activities, chemical composition and cholesterol. Diet had no
effect on the carbonyl content, free thiol content, water-holding capacity, tenderness, pH and glycogen. Oil-supplemented goats
had higher (P<0.05) C18:1 trans-11, C18:3n-3 and C20:5n-3, carotenoid, tocopherol and redness, and lower thiobarbituric acid
reactive substances values than the control goats. Post mortem ageing decreased (P<0.05) shear force and oxidative stability of
chevon. No significant (P>0.05) changes were found in the proportion of individual fatty acids throughout storage. Total
polyunsaturated fatty acids (PUFA) decreased while total saturated fatty acids increased as storage progressed. Dietary BCPO
enhanced n-3 PUFA without compromising the quality attributes of chevon
Description
Keywords
ageing, antioxidant, carbonyl, cholesterol, thiol