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首页> 外文期刊>Tropical Animal Health and Production >Extensive analysis of milk fatty acids in two fat-tailed sheep breeds during lactation
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Extensive analysis of milk fatty acids in two fat-tailed sheep breeds during lactation

机译：泌乳期间两个肥尾绵羊品种中牛奶脂肪酸的广泛分析

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摘要

The profile of fatty acids (FA) in the milk fat of two Iranian fat-tailed sheep breeds, Sanjabi and Mehraban, was compared during lactation. Eight ewes of each breed, balanced in parity and carrying one foetus, were selected before parturition. Ewes were kept separated in individual pens during the experimental period, under the same management practices and fed the same diet, in order to eliminate any confounding effects on milk FA profile. Milk was sampled at biweekly intervals up to 10 weeks of lactation, starting 2 weeks after parturition. More than 100 FA were determined in milk fat by means of gas chromatography. The milk fat of Sanjabi ewes contained more cis-9 18:1, that of Mehraban ewes was richer in 10:0, 12:0 and 14:0, and no differences were found for 16:0 and 18:0. No breed differences were found for most branched-chain FA. Mehraban ewes showed a higher presence of vaccenic and rumenic acids in their milk fat. The milk fat of Sanjabi ewes had a lower atherogenicity index and n-6-3 FA ratio. The contents of several FA showed time-dependent changes, so breed differences were more apparent or disappeared as lactation progressed. The milk fat of Sanjabi ewes showed a better FA profile from the human health point of view.
机译：在哺乳期间比较了两个伊朗胖尾绵羊品种桑贾比和Mehraban的乳脂中的脂肪酸（FA）分布。分娩前，每个母羊选出八头母羊，每只母羊平衡，并带有一个胎儿。为了消除对牛奶FA谱图的任何混杂影响，在实验期间，采用相同的管理方法并以相同的饮食喂养母羊，使其保持独立状态。从分娩后2周开始，每隔两周取样一次，直到哺乳期10周为止。通过气相色谱法测定了牛奶中的脂肪超过100 FA。 Sanjabi母羊的乳脂中含有更多的顺式9 18：1，Mehraban母羊的乳脂中更富含10：0、12：0和14：0，而16：0和18：0则没有差异。对于大多数支链FA，没有发现品种差异。 Mehraban母羊的乳脂中存在较高的痘苗酸和瘤胃酸。 Sanjabi母羊的乳脂具有较低的动脉粥样硬化指数和n-6 / n-3 FA比。几种FA的含量显示出时间依赖性变化，因此随着泌乳的进行，品种差异变得更加明显或消失。从人类健康的角度来看，桑贾比母羊的乳脂显示出更好的脂肪酸分布。

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