两种杂交商品猪冷却肉常规养分含量、蛋白质溶解性及脂肪酸组成的比较

通过比较含地方猪血缘的杂交商品猪(杜浙猪)与外三元杂交商品猪(杜大长)背最长肌和腰大肌冷却肉的常规养分、蛋白质溶解度及脂肪酸组成,深入评价含地方猪血缘的杂交商品猪在优质猪肉生产中的优势。结果表明,杜浙猪背最长肌冷却肉的粗蛋白和粗脂肪含量显著高于杜大长猪(p<0.05),粗灰分含量显著低于杜大长猪(p<0.05);杜浙猪背最长肌和腰大肌冷却肉的肌浆蛋白溶解度均显著高于杜大长猪(p<0.05),纤维蛋白溶解度显著低于杜大长猪(p<0.05);杜浙猪背最长肌和腰大肌冷却肉的饱和脂肪酸、单不饱和脂肪酸和多不饱和脂肪酸含量均显著高于杜大长猪(p<0.05)。综合上述指标,杜浙猪冷却肉的营养价值和蛋白质功能性优于杜大长猪,将为充分利用地方猪种资源进行优质猪肉生产提供依据。

Comparison of conventional nutrient contents,protein solubility and fatty acid composition in chilled pork between Chinese native crossbred pigs and foreign crossbred pigs

Conventional nutrient contents,protein solubility and fatty acid composition in chilled pork were measured to analyze and evaluate the superiority of Chinese native crossbred pigs(DZ,Duroc×Zhongbai)than foreign crossbred pigs(DYL,Duroc×Yorkshire×Landrace)for the production of high quality pork.The results showed:higher contents of crude protein and crude fat,lower crude ash content in longissimus dorsi(LD)of DZ pigs than DYL pigs(p<0.05);higher sarcoplasmic protein solubility and lower myofibril protein solubility in LD and psoas major(PM)of DZ pigs than DYL pigs(p<0.05);higher contents of saturated fatty acids(SFA),monounsaturated fatty acids(MUFA)and polyunsaturated fatty acids(PUFA)in LD and PM of DZ pigs than DYL pigs(p<0.05).To sum up,the nutrition value and protein functionality in chilled meat of DZ pigs were better than DYL pigs.This would provide evidence for the utilization of Chinese native crossbred pigs in the production of high quality pork.