关键词: 阿尔巴斯山羊, 鄂尔多斯细毛羊, 常规营养素, 正交偏最小二乘判别分析

Abstract: [Objective] Routine nutrient parameters with high reference value of Albas goat and Ordos fine wool sheep muscle were obtained, which provided reference for nutrition evaluation, product standard revision and publicity. [Methods] A total of 204 biceps femoris and longissimus dorsi muscles were collected from eight breeds of goats and sheep, including Ordos Albas goats, Ordos fine wool sheep, goats and sheep from Alxa, Ningxia and Shanxi. Four routine nutrient contents were determined, and descriptive statistics and orthogonal partial least squares discriminant analysis were performed. [Results] The protein, fat, moisture and ash contents （X±2SD, g/100 g） of Albas goat meat were （22.10±1.41）, （3.95±1.11）, （73.65±1.43） and （1.49±0.31） g/100 g, respectively. The protein content was significantly （P<0.05） higher than that of other breeds of goats and sheep;the fat content is lower than that of Alxa white cashmere goats and Hengshan goats, but the difference is not significant （P>0.05）; the moisture content is significantly higher than that of Hengshan goats （P<0.05）. Samples from core producing areas showed significantly （P<0.05） higher protein content than those from non-core producing areas. The protein, fat, moisture and ash contents of Ordos fine wool mutton were （20.25±1.63）, （5.68±2.16）, （72.61±2.18） and （1.59±0.46） g/100 g, respectively. Intramuscular fat content was significantly （P<0.05） higher than that of other breeds of goats and sheep. The protein content of Ordos fine wool sheep in Wushenzhao Town was significantly （P<0.05） higher than that in the other two towns. The supervised OPLS-DA results of routine nutrients showed that goats and sheep had a clustering separation tendency, with protein and ash being the major contributing factors. When fat was replaced by four comprehensive indicators of fatty acids, the clustering separation was more obvious, and the separation effect of breed/region was also better. The major contributing indicators were ash, saturated fatty acid （SFA）, polyunsaturated fatty acid （PUFA）, monoun-saturated fatty acid （MUFA） and trans fatty acid （TFA）. [Conclusion] Albas goats meat exhibited nutritional advantages with high protein, low fat and strong water-holding capacity. Ordos fine wool sheep showed significantly higher intramuscular fat content compared with other breeds of goats and sheep, indicating that the sensory quality was better. Further research should be carried out in terms of texture indicators.

Key words: Albas goat, Ordos fine wool sheep, routine nutrients, orthogonal partial least squares discriminant analysis （OPLS-DA）