金川牦牛和中国西门塔尔牛肉品质差异研究

[目的]为从分子水平探究隆林黄牛的遗传多样性及父系起源。[方法]利用PCR测序及生物信息方法,对20头隆林黄牛公牛的2个Y-SNPs标记(UTY-19和ZFY-10)进行多态性检测。[结果]结果显示,20头隆林黄牛中有14头为Y3单倍型组(70%),有6头牛为Y2单倍型组(30%),Y染色体单倍型多样度为0.4421±0.0875,表明隆林牛具有丰富的Y染色体遗传多样性。[结论]隆林黄牛具有瘤牛和普通牛2个父系起源,以瘤牛父系起源为主。

Beef Quality Difference of Jinchuan Yak and Chinese Simmentel

[Objective] In order to study the difference in beef quality between Jinchuan yak and Chinese Simmental. [Method] In this experiment, adult Jinchuan yak and Chinese Simmental cattle were selected for comparative analysis of slaughter performance. The measured indicators include: Fat, moisture, protein, pH, shear, cooking loss, pressure loss rate, flesh color (L^*, a^* and b^* values), amino acids, fatty acids. [Result] The results showed that there were significant differences in fat, protein, L^* value, a^* value, amino acid and fatty acid between the experimental group Jinchuan yak and the control group of Chinese Simmental cattle (P < 0.05). There was no significant difference in water, pH, shearing force, cooking loss, and b^* value (P > 0.05). [Conclusion] Compared with the quality of Chinese Simmental beef, the experimental group Jinchuan yak has higher fat, protein, total essential amino acids, unsaturated fatty acids, L^* and b^* values, and its nutritional value is higher and the flesh color is more vivid.