Effect of castration on carcass quality and differential gene expression of longissimus muscle between steer and bull

文献类型： 外文期刊

第一作者： Zhou, Zheng-Kui

作者： Zhou, Zheng-Kui;Gao, Xue;Li, Jun-Ya;Chen, Jin-Bao;Xu, Shang-Zhong;Zhou, Zheng-Kui

作者机构：

关键词： gene: expression;actin;insulin like growth factor 1: 67763-96-6;hormone-sensitive lipase: 9001-62-1;EC 3.1.1.79;tropomyosin-2;dressing percentage;carcass quality;meat quality

期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The effect of castration on carcass quality was investigated by ten Chinese Simmental calves. Five calves were castrated randomly at 2 months old and the others were retained as normal intact bulls. All animals were slaughtered at 22 months old. The results showed that bulls carcass had higher weight (P < 0.05), dressing percentages and bigger longissimus muscle areas (P < 0.05) than steers. But steer meat had lower shear force values and was fatter (P < 0.05) than bull. Furthermore, in order to discover genes that were involved in determining steer meat quality, we compared related candidate gene expression in longissimus muscle between steer (tester) and bull (driver) using suppressive subtractive hybridization. Ten genes were identified as preferentially expressed in longissimus muscle of steer. The expression of four selected differentially expressed genes was confirmed by quantitative real-time PCR. Overall, a 1.96, 2.41, 2.89, 2.41-fold increase in expression level was observed in steer compared with bull for actin, gamma 2, smooth muscle, tropomyosin-2, insulin like growth factor 1 and hormone-sensitive lipase, respectively. These results implied that these differentially expressed genes could play an important role in the regulation of steer meat quality.

分类号： Q7

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