鲁农2号猪配套系商品猪肌糖原含量与胴体品质及肉质相关分析

Correlativity Analysis of Muscle Glycogen and Carcass Performance and Pork Quality of Lunong Synthetic Line No. 2 Finishing Pigs

试验分析了鲁农2号猪肌糖原含量与胴体品质及肉质的相关关系。将30头体质量30kg左右的鲁农2号猪在相同条件下饲养,到体质量达100kg时屠宰,并测定肌糖原、胴体品质及肉质。结果表明:肌糖原含量与胴体品质及肉质性状间相关程度有强有弱,相关系数有正有负。肌糖原含量与胴体性状相关性不显著,与瘦肉率、眼肌面积、后腿比例和骨骼率呈负相关,相关系数分别为-0.155、-0.061、-0.329、-0.204,与平均背膘厚和皮脂率呈正相关,相关系数分别为0.373和0.20。肌糖原含量与部分肉质性状相关性显著。如与肉色评分极显著正相关,相关系数为0.509,与大理石纹显著正相关,相关系数为0.389,与L显著负相关,相关系数为-0.433,与失水率极显著负相关,相关系数为-0.536,与其它肉质性状相关较弱;肌糖原含量与背最长肌氨基酸和脂肪酸含量呈正相关(胱氨酸和蛋氨酸除外),但相关性不显著。研究表明肌糖原含量是影响猪肉质性状的一个重要因素。

This study investigated the relationships between muscle glycogen and carcass performance and pork quality of Lunong synthetic line No.2 finishing pigs.Thirty Lunong synthetic line No.2 finishing pigs with BW 30 kg were fed with same diets ,and slaughtered when their weight attained 100 kg.The results suggested that the degrees of correlation between muscle glycogen and carcass traits and meat traits were strong or weak,the correlation coefficients were positive or negative.The correlation between muscle glycogen and carcass traits was not obvious.The glycogen content had negative relation to lean percentage ,eye lean area,ham percentage and bond percentage.The correlation coefficients were-0.155,0.061,0.329and-0.204.The glycogen content had positive relation to backfat thichness and skin and fat percentage,the correlation coefficients were.0.373 and 0.201.The correlation between muscle glycogen and some pork traits was remarkable .The glycogen content had extremely remarkable positive relation to meat color,the correlation coefficient was 0.509.The glycogen content had remarkable positive relation to marbling score,the correlation coefficient was 0.389.The glycogen content had remarkable negative relation to L,the correlation coefficient was-0.433.The glycogen content had extremely remarkable negative relation to water loss,the correlation coefficient was-0.536.The glycogen content had small relation to the other pork traits.The glycogen content had positive relation to longissimus muscle amino acid contents and fatty acid contents,except Cys and Met.But the correlation was not obvious.The results of this study suggests that muscle glycogen concentration at the time of slaughter is an important factor influencing meat quality traits.