Graduate School of Agricultural Science, Kobe University, Nada, Kobe, Japan.
Anim Sci J. 2009 Jun;80(3):225-32. doi: 10.1111/j.1740-0929.2009.00638.x.
Fatty acid composition of beef adipose tissue is one of important traits because high proportions of monounsaturated fatty acid are related to favorable beef flavor and tenderness. In this study, we investigated effects of genetic factors such as stearoyl-CoA desaturase (SCD) and sterol regulatory element binding protein (SREBP) on beef carcass traits including fatty acid composition using two cattle populations. Sire effect was significantly related to almost all traits except BMS, suggesting that the trait examined in this study is highly controlled by genetic factors. The effect of SCD genotype on fatty acid composition was detected remarkably in both cattle groups, especially on stearic and oleic acids. This result was consistent with our previous studies and suggests that SCD is associated with fatty acid composition. Unlike SCD genotyping, the effect of SREBP genotype was not identified in this study. Our results suggested that SCD genotype would contribute to improving beef quality in field populations. Further studies about the relationship among these factors will bring an insight into the molecular mechanism of fatty acid metabolism in cattle.
牛肉脂肪组织的脂肪酸组成是一个重要的特征，因为高比例的单不饱和脂肪酸与良好的牛肉风味和嫩度有关。在这项研究中，我们利用两个牛群研究了遗传因素（如硬脂酰辅酶 A 去饱和酶（SCD）和固醇调节元件结合蛋白（SREBP））对包括脂肪酸组成在内的牛肉胴体性状的影响。父本效应与除 BMS 之外的几乎所有性状都显著相关，这表明本研究中检测的性状受遗传因素高度控制。SCD 基因型对两个牛群的脂肪酸组成的影响都非常显著，尤其是对硬脂酸和油酸。这一结果与我们之前的研究一致，表明 SCD 与脂肪酸组成有关。与 SCD 基因分型不同，SREBP 基因型的影响在本研究中未被识别。我们的结果表明，SCD 基因型将有助于改善田间种群的牛肉质量。进一步研究这些因素之间的关系将深入了解牛脂肪酸代谢的分子机制。
