Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga, São Paulo, Brazil.
Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA.
J Anim Sci. 2021 Sep 1;99(9). doi: 10.1093/jas/skab244.
This study aimed to evaluate the effect of dietary yerba mate (Ilex paraguariensis) extract (YME) on muscle metabolomics and physicochemical properties of lamb meat. Thirty-six uncastrated male lambs (90 d old) were fed experimental diets, which treatments consisted of 0%, 1%, 2%, and 4% inclusion of YME. Animals were fed for 50 d before slaughter. Muscle and meat samples were collected for metabolomics and meat quality analysis, respectively. The experiment was carried out in a randomized block design and analyzed using orthogonal contrasts. There was a quadratic effect of YME inclusion in tenderness (P < 0.05) and a positive linear effect on meat lightness (P < 0.05). No qualitative changes (P > 0.05) on individual metabolites were observed; however, changes in the quantitative metabolic profile were observed, showing that animals fed 1% and 2% of YME have a greater concentration of desirable endogenous muscle antioxidants, with direct impact on metabolic pathways related to beta-alanine metabolism and glutathione metabolism. Therefore, YME dietary supplementation up to 2% of the diet to lambs had little to no effects on the majority of meat quality traits evaluated; moreover, 4% of YME inclusion negatively affected feed intake and meat quality traits.
本研究旨在评估日粮马黛茶（Ilex paraguariensis）提取物（YME）对羊肉肌内代谢组学和理化特性的影响。36 只未去势的雄性羔羊（90 日龄）分别饲喂含 0%、1%、2%和 4%YME 的试验日粮，预饲期 50 d 后屠宰。采集肌肉和肉样，分别进行代谢组学和肉质分析。试验采用完全随机区组设计，采用正交对比分析。YME 添加量对嫩度呈二次效应（P＜0.05），对肉色亮度呈正线性效应（P＜0.05）。未观察到单个代谢物的定性变化（P＞0.05），但代谢谱的定量变化表明，饲喂 1%和 2%YME 的动物具有更高浓度的内源性肌肉抗氧化剂，这直接影响与β-丙氨酸代谢和谷胱甘肽代谢相关的代谢途径。因此，日粮中添加 2%YME 对羔羊的大多数评估肉质特性影响很小或没有影响；此外，4%YME 摄入会降低饲料采食量和肉质特性。
