鲁莱黑猪肌内脂肪含量、脂肪酸组成及其相关性状分析

发布时间：2018-12-27 10:46

【摘要】：本研究旨在对中国地方培育猪种鲁莱黑猪的肌内脂肪(Intramuscular fat,IMF)含量、脂肪酸组成及其相关性状进行研究,为全面了解鲁莱黑猪的种质特性提供基础数据。本研究测定了487头鲁莱黑猪胴体背膘厚、背最长肌游离水分、肌内脂肪含量和脂肪酸成分,分析了性别和体重对各指标的影响及各性状间的相关性。结果表明,鲁莱黑猪具有很强的肌内脂肪沉积能力,IMF含量平均高达5.25%,但群体内变异性较大(变异系数高达66.04%),需要进一步加强品种选育,提高群体的整齐性;除花生烯酸外,性别对其他被测性状均无显著影响(P0.05);屠宰体重对背膘厚有极显著影响(P0.01),对IMF含量有显著影响(P0.05),对水分及脂肪酸组成无显著影响(P0.05);各性状间,IMF与游离水分相关程度最高(相关系数为-0.86),二者间回归方程具有高的校正决定系数平方(0.929 4),可以作为利用肌肉中游离水分估测肌内脂肪含量的模型。另外,不同部位背膘厚之间,IMF含量与部分脂肪酸成分之间,各脂肪酸成分之间亦存在高度相关。本研究结果加深了对鲁莱黑猪肉质特性认识,为今后肉质选育工作提供数据支持。
[Abstract]:The purpose of this study was to study the content of intramuscular fat (Intramuscular fat,IMF), fatty acid composition and related characters of Lulai black pig bred in China, so as to provide basic data for understanding the germplasm characteristics of Lulai black pig. In this study, the carcass backfat thickness, free moisture of longissimus dorsi muscle, intramuscular fat content and fatty acid composition of 487 Lulai black pigs were measured, and the effects of sex and body weight on each index and the correlation between each trait were analyzed. The results showed that Lulai black pig had strong ability of intramuscular fat deposition, the IMF content was 5.25% on average, but the variation coefficient was high (66.04%). Improve group neatness; Except for arachidonic acid, sex had no significant effect on other traits (P0.05). Slaughter weight had significant effect on backfat thickness (P0.01), IMF content (P0.05), and had no significant effect on water and fatty acid composition (P0.05). The correlation between IMF and free water was the highest (correlation coefficient was -0.86), and the regression equation between them had a high square of correction determination coefficient (0.929 4). It can be used as a model for estimating muscle fat content using free water in muscle. In addition, there was a high correlation between the content of IMF and some fatty acids in different parts of backfat. The results of this study have deepened the understanding of the meat quality characteristics of Lulai Black Pig and provided data support for meat quality breeding in the future.
【作者单位】：山东省农业科学院畜牧兽医研究所山东省畜禽疫病防治与繁育重点实验室;莱芜市畜牧兽医局;
【基金】：国家自然科学基金(31372293) 国家生猪产业技术体系(CARS-36) 山东省现代农业产业技术体系生猪创新团队建设项目(SDAIT-08-03)
【分类号】：S828

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