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A total of 80 pigs were used to investigate the effect of crossbred method on meat quality. Crossbred pigs were alloted into one of two experimental groups[T1 : Landrace Yorkshire Duroc(LYD) and T2: Yorkshire Berkshire Berkshire(YBB)]. Crossbred pigs were slaughtered at approximately 110kg live weight, and pH, cooking loss, texture, shear force, color(CIE ), fatty acid composition and sensory evaluation were measured in pork loin. Crude fat percentage was higher in YBB, whereas protein was higher in LYD than that for the other groups. Shear force was lower in YBB than LYD, but, pH and water-holding capacity were not significantly different. In meat color, was higher in YBB than LYD, whereas and were not significantly different between breeds. Hardness, adhesiveness and gumminess of YBB were significantly lower than LYD. Saturated fatty acid of YBB was lower than that for LYD and essential fatty acid was higher in YBB. In sensory evaluation of cooked meat, color, marbling score and overall acceptability were significantly higher in YBB, Aroma, flavor, taste, juiciness and overall acceptability of YBB were significantly higher than LYD in fresh meat. In conclusion, the overall meat quality was better in YBB than that for LYD.

Objectives of this study was to determine the comparisons of physico-chemical characteristics in crossbred pigs(Korean native breed × Landrace breed) by feeding periods. A total of 150 pigs were sampled from com- mercial farm, and assigned into three treatedments. Feeding peirods of T1, T2 and T3 were below 200 days, 220-220 days, over 220 days, respectively. Live weight, carcass weight and backfat thickness were sig- nificantly(P T3 > T2. Shear force values was significantly(P < 0.05) decreased by feed period increase. In fatty acids, myristic acid, palmitic acid, stearic acid and saturated fatty acid(SFA) in T2 were significantly(P < 0.05) lower in T2, whereas linolenic acid, unsaturated fatty acid(UFA), essential fatty acid(EFA), UFA/SFA and EFA/SFA were significantly higher in T2 compared with other treatment. However palmitoleic acid and arachidonic acid were no significantly different with feeding periods. As a result of this study, crossbred pigs was increased live weight and carcass weight with feeding periods, and improved meat color and tenderness with feeding periods. However, final grade score was de- creased with feeding periods.

Subjective pork quality was determined on the six groups of the following treatments. Meat samples were obtained from pigs which had been fed with finishing pig diets containing 5% beef tallow(C), 3% beef tallow and 2% perillar seed oil(T1), 250ppm vitamin E(ǯ -tocopheryl acetate) in T1(T2), 3% beef tallow and 2% squid viscera oil(T3), 250ppm vitamin E in T3(T4), 3% beef tallow and 2% CLA(Conjugated linoleic acid, T5). In the fatty acid composition, SFA(Saturated fatty acid) and EFA(Essential fatty acid) were higher in T5 than in the rest of three treatments such as C, T1, T3 groups, while UFA(Unsaturated fatty acid), MUFA(Monounsaturated fatty acid), UFA/SFA, MUFA/SFA were low. The total content of amino acid in the T3 were higher those for the rest of rest of C, T1, T5 the content for vitamin added treatment(T2, T4) groups higher than non treated one. T3 and T5 showed higher TBARS(Thiobarbituric acid reactive substance) values than the C and T1 groups VBN(Volatile basic nitrogen) values were higher in the order of T5>T3>T1>C. There was no difference in total plate counts, number of lactic acid bacteria and number of E. coli. In sensory property, the C and T1 showed a higher acceptance than the T3 and T5. In cooked meats, the T3 showed a lower hardness than that of control(C), T1 and, with a higher acceptance. In TBARS, VBN, total counts, lactic counts, and E. coli counts, sensory test of cooked meat and raw meat, there was no significant difference between vitamin supplement groups within each oil treatment.