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首页> 美国卫生研究院文献>Antioxidants >MARGRA Lamb Eating Quality and Human Health-Promoting Omega-3 Long-Chain Polyunsaturated Fatty Acid Profiles of Tattykeel Australian White Sheep: Linebreeding and Gender Effects
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MARGRA Lamb Eating Quality and Human Health-Promoting Omega-3 Long-Chain Polyunsaturated Fatty Acid Profiles of Tattykeel Australian White Sheep: Linebreeding and Gender Effects

机译：Margra羊肉吃质量和人类健康促进欧米茄3长链多不饱和脂肪酸型脂肪酸澳大利亚白羊：纳米繁殖和性别效应

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Health-conscious consumers increasingly demand healthier, tastier, and more nutritious meat, hence the continuous need to meet market specifications and demand for high-quality lamb. We evaluated the longissimus dorsi muscle of 147 Tattykeel Australian White (TAW) sheep fed on antioxidant-rich ryegrass pastures exclusive to MAGRA lamb brand for meat eating quality parameters of intramuscular fat (IMF) content, fat melting point (FMP) and omega-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFA). The aim was to assess the impact of linebreeding and gender on pasture-fed lamb eating quality and to test the hypothesis that variation in healthy lamb eating quality is a function of lamb gender and not its antioxidant status or inbreeding coefficient (IC). After solid-phase extraction and purification, phenolics and antioxidant enzyme activities were analysed by high-performance liquid chromatography and mass spectrometry. IMF and fatty acid composition were determined using solvent extraction and gas chromatography, respectively. IC was classified into low (0–5%), medium (6–10%) and high (>10%) and ranged from 0–15.6%. FMP and IMF ranged from 28 to 39 °C and 3.4% to 8.2%, with overall means of 34.6 ± 2.3 °C and 4.4 ± 0.2%, respectively, and n-3 LC-PUFA ranged from “source” to “good source” levels of 33–69 mg/100 g. Ewes had significantly (P ˂ 0.0001) higher IMF, C22:5n-3 (DPA), C22:6n-3 (DHA), C18:3n-6, C20:3, C22:4n-6, C22:5n-6, total monounsaturated (MUFA), PUFA and Σn-3 fatty acids and lower total saturated fatty acids (SFA) and FMP, than rams. As IC increased, there were no differences in FMP and IMF. Folin–Ciocalteu total phenolics, ferric reducing antioxidant power and antioxidant activities of glutathione peroxidase, catalase and superoxide dismutase enzymes did not differ by either gender or IC. This study provides evidence that IC is inconsequential in affecting antioxidant status, IMF, FMP and n-3 LC-PUFA in linebred and pasture-fed TAW sheep because the observed variation in individual fatty acids was mainly driven by gender differences between ewes and rams, hence the need to accept the tested hypothesis. This finding reinforces the consistent healthy eating quality of MARGRA lamb brand from TAW sheep regardless of its linebred origin.
机译：健康意识的消费者日益更健康，口味和更营养的肉类，因此不断满足市场规范和对高质量羊羔的需求。我们评估了147张Tattykeel澳大利亚白人（Taw）绵羊的富含抗氧化剂的黑麦草牧场的Longissimus Dorsi肌肉，专用于Magra Lamb品牌，用于肌肉内脂肪（IMF）含量，脂肪熔点（FMP）和Omega-3长链多不饱和脂肪酸（N-3 LC-PUFA）。目的是评估较恐惧和性别对牧场喂养羊肉吃质量的影响，并测试健康羊肉进食质量变化的假设是羊羔性别的功能，而不是其抗氧化状态或近亲繁殖系数（IC）。通过高效液相色谱和质谱分析固相萃取和纯化，酚类和抗氧化酶活性。使用溶剂萃取和气相色谱法测定IMF和脂肪酸组合物。 IC分为低（0-5％），中等（6-10％）和高（> 10％），范围为0-15.6％。 FMP和IMF的范围为28至39°C和3.4％至8.2％，总体分别为34.6±2.3°C和4.4±0.2％，N-3 LC-PUFA从“源”到“好来源” “33-69毫克/ 100克的水平。母羊具有显着显着（P = 0.0001），IMF高，C22：5N-3（DPA），C22：6N-3（DHA），C18：3N-6，C20：3，C22：4N-6，C22：5N-6 ，总单饱和（MUFA），PUFA和σn-3脂肪酸和低总饱和脂肪酸（SFA）和FMP，而不是RAM。随着IC的增加，FMP和IMF没有差异。 Folin-Ciocalteu总酚醛化，谷胱甘肽过氧化物酶，过氧化氢酶和超氧化物歧化酶的抗氧化能力和抗氧化活性并未因性别或IC而异。本研究规定了IC在含有抗氧化状态，ICF，FMP和N-3 LC-PUEE中的IC无关紧要，因为单个脂肪酸的观察变异主要受EWES和RAM之间的性别差异，因此需要接受测试的假设。这一发现强化了塔布羊肉品牌的一致健康饮食质量，无论其绞针如何。

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