Abstract This study aimed to compare lamb meat composition from five Iberian breeds raised in their typical rearing systems and to reveal trends in compositional meat attributes due to breed or production system. The meat quality of 153 animals was analysed. The combined effect of breed × production system produced significant differences in lamb meat quality. Meat from the extensively-reared Bordaleira-de-Entre-Douro-e-Minho (BEDM) and Gallega breeds had elevated amounts of n-3 PUFAs, tocopherol content and favourable n-6/n-3 ratio. Meat from lambs grown under extensive and semi-extensive systems presented higher content of conjugated linoleic acid than the two breeds reared intensively. The meat of commercial breed (INRA401) was characterised by higher content of protein and MUFAs and lower atherogenic potential than the breeds reared in extensive and semi-extensive systems. Principal component analysis demonstrated that meat from extensively raised lambs was associated to higher SFA, CLA, α-tocopherol, n-3, atherogenic index and cholesterol content, but lower intramuscular fat and retinol content, MUFA and n-6/n-3.

中文翻译：

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伊比利亚当地品种羊肉的成分特性和脂肪酸分布

摘要 本研究旨在比较在典型饲养系统中饲养的五个伊比利亚品种的羊肉成分，并揭示由于品种或生产系统而导致的肉类成分趋势。分析了 153 只动物的肉质。品种×生产体系的综合作用产生了羊肉品质的显着差异。来自广泛饲养的 Bordaleira-de-Entre-Douro-e-Minho (BEDM) 和 Gallega 品种的肉的 n-3 多不饱和脂肪酸、生育酚含量和良好的 n-6/n-3 比率升高。在粗放和半粗放系统下生长的羔羊肉的共轭亚油酸含量高于两个集中饲养的品种。与在粗放和半粗放系统中饲养的品种相比，商业品种 (INRA401) 的肉类具有更高的蛋白质和 MUFA 含量以及更低的动脉粥样硬化潜力。主成分分析表明，广泛饲养的羊肉与较高的 SFA、CLA、α-生育酚、n-3、致动脉粥样硬化指数和胆固醇含量有关，但与较低的肌内脂肪和视黄醇含量、MUFA 和 n-6/n-3 相关。