Effects of Two Feeding Patterns on Oxidation stability of Sunit Sheep Meat

Abstract

Abstract: The objective of this study was to investigate the difference in lipid oxidation, thiobarbituric acid (TBA), enzyme, antioxidant ability and related genes of biceps muscles muscles from Sunit sheep subjected to feeding patterns (grazed and concentrated). The results showed that TBA of grazed sunit sheep were significantly lower than concentrated (P<0.001). Hexanal, heptanal, nonanal, 1-octen-3-ol and 2,3-octanedione may be mainly responsible for the formation of meat lipid oxidation, which contents were lower in grazed sheep (P<0.05). It indicated that the concentrated sheep meat have deeply the lipid oxidation degree. As to the antioxidant properties, total antioxidant capacity (T-AOC, P<0.01) and cupric reducing antioxidant capacity (CUPRAC, P<0.05) of grazed sheep were significantly higher than concentrated. Meanwhile, superoxide dismutase (SOD, P<0.001), catalase (CAT, P<0.05) and glutathione peroxidase (GPx, P<0.05) of grazed sheep were significantly higher than concentrated. which could effectively inhibit lipid oxidation. Furthermore, the expression of related genes showed that SOD (P<0.001), CAT (P<0.05) and GPx (P<0.05) were significantly higher in grazed sheep than concentrated, while LOX was significantly lower in grazed (P<0.001), and further confirmed by molecular level that the antioxidant capacity of grazed sheep was better than concentrated.

Key words: Feeding pattern, Sunit sheep, Lipid oxidation, Antioxidant enzyme, Related gene

CLC Number:

TS251.1

Yu-Long LUO. Effects of Two Feeding Patterns on Oxidation stability of Sunit Sheep Meat[J]. FOOD SCIENCE, 0, (): 0-0.

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