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首页> 外文会议>International Congress on Meat Science and Technology >COMPARISONS OF FATTY ACID PROFILES IN BEEF FROM NGUNI,BONSMARA AND ABERDEEN ANGUS STEERS RAISED ON VELD
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COMPARISONS OF FATTY ACID PROFILES IN BEEF FROM NGUNI,BONSMARA AND ABERDEEN ANGUS STEERS RAISED ON VELD

机译：牛肉中牛肉中脂肪酸曲线的比较在VELD上提出的牛肉中牛肉中的牛肉曲线

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IntroductionRed meat has a relatively high ratio of saturated to unsaturated fatty acids (FA's), which is a risk factor for the development of cardiovascular diseases. The adverse effect of saturated fatty acids (SFA) on the human plasma cholesterol levels makes it imperative to evaluate FA profiles in beef. Polyunsaturated to saturated fatty acids (PUFA/SFA) and Omega 6 (n-6) to Omega 3 (n-3) ratios, and conjugated linoleic acid (CLA) are important because of their effects on obesity, cardiovascular problems and anticarcinogenic action (Moreno et al., 2006). Fatty acid composition is influenced by diet and genotype due to the underlying differences in gene expression or activities of enzymes involved in FA synthesis, desaturation or chain elongation (Barton et al., 2007). The majority of the available reports on meat quality in Southern Africa are based on established beef breeds, such as the Angus and the Hereford on cultivated pastures and feedlots in the sourveld (Strydom et al., 2000). No studies on FA profiles have been reported in cattle that are grazed communally on veld, without any form of dietary supplementation. In communal grazing cattle from different households are brought together and grazed in areas which are owned by communities with limited and inadequate veld management principles being applied, resulting in overgrazing and loss of weight, specially during the dry season. This may affect FA composition which is closely related to fatness (Zembayashi et al., 1995). Therefore, the objective of this study was to compare FA profiles of Nguni, Bonsmara and Angus steers raised Under natural grazing without dietary supplementation.
机译：介绍肉具有饱和脂肪酸（FA）的饱和脂肪酸（FA）的比例，这是心血管疾病发展的危险因素。饱和脂肪酸（SFA）对人血浆胆固醇水平的不利影响使得评估牛肉中的FA型材。多不饱和至饱和脂肪酸（PUFA / SFA）和Omega 6（N-6）至ω3（N-3）比，而缀合的亚油酸（CLA）是重要的，因为它们对肥胖，心血管问题和抗遗传学作用的影响（ Moreno等，2006）。由于FA合成，去饱和或链伸长率（Barton等，2007）所涉及的基因表达或酶活性的潜在差异，脂肪酸组合物受饮食和基因型的影响。大多数关于南非肉类品质的可用报告基于已建立的牛肉品种，例如Angus和Sourveld的培养牧场和饲养物（Strydom等，2000）。没有关于FA型材的研究已在牧牛中报告在veld上进行一次饲养，没有任何形式的膳食补充剂。在不同家庭的公共放牧牛中，汇集在一起​​，并在有限的社区拥有的地区占据了应用的区域，导致在干燥季节期间特别造成过度吸收和重量的损失。这可能会影响与脂肪密切相关的FA组成（Zembayashi等，1995）。因此，本研究的目的是比较NGUNI，Bonsmara和Angus Steers在没有膳食补充的情况下在自然放牧下举起的努加马拉和安格斯阉牛。

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