食品科学 ›› 2017, Vol. 38 ›› Issue (19): 30-34.doi: 10.7506/spkx1002-6630-201719006

• 基础研究 • 上一篇    下一篇

不同饲养方式对苏尼特羊背最长肌肌纤维类型组成的影响

赵雅娟1,尹丽卿1,苏 琳1,刘树军2,李 云2,王小斌2,靳 烨1,*   

  1. 1.内蒙古农业大学食品科学与工程学院,内蒙古 呼和浩特 010018; 2.乌拉特中旗农区畜牧业专项推进办公室,内蒙古 乌拉特中旗 015300
  • 出版日期:2017-10-15 发布日期:2017-09-29
  • 基金资助:
    国家自然科学基金面上项目(31360393)

Effect of Different Feeding Systems on Muscle Fiber Types of Longissimus dorsi from Sunit Sheep

ZHAO Yajuan1, YIN Liqing1, SU Lin1, LIU Shujun2, LI Yun2, WANG Xiaobin2, JIN Ye1,*   

  1. 1. College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; 2. Wulate Middle Banner Animal Husbandry Special-Purpose Facilitation Office, Wulate Middle Banner 015300, China
  • Online:2017-10-15 Published:2017-09-29

摘要: 以12 月龄不同饲养条件下(放牧和圈养)苏尼特羊背最长肌作为实验材料,用ATP酶染色法和实时定量 聚合酶链式反应技术研究不同饲养方式下肌纤维类型组成。结果表明:放牧苏尼特羊背最长肌Ⅰ型和ⅡB型肌纤维 直径和横截面积均显著小于圈养(P<0.05);同时,放牧苏尼特羊背最长肌Ⅰ型和ⅡA型肌纤维数量比例和面积比 例、MyHCⅠ 和MyHCⅡ a基因的mRNA表达量均显著大于圈养(P<0.05),ⅡB型肌纤维数量比例和MyHCⅡ b型基 因mRNA表达量则呈现相反趋势。

关键词: 苏尼特羊, 饲养方式, 肌纤维类型, MyHC基因

Abstract: The aim of this study was to investigate the influence of different feeding systems (stall feeding and grazing) on muscle fiber types of longissimus doris from Sunit sheep by ATPase histochemical staining and real-time polymerase chain reaction. The results showed that the diameters and cross-sectional areas of type Ⅰ and ⅡB muscle fibers in longissimus doris from grazing sheep were significantly lower than those from stall-fed sheep (P < 0.05). The number and area percentages of type Ⅰ and type ⅡA, and MyHCⅠ and MyHCⅡa gene expression in grazing sheep were significantly higher than those in stall-fed sheep (P < 0.05), but the expression of type ⅡB and MyHCⅡb genes present the opposite trend.

Key words: Sunit sheep, feeding systems, muscle fiber types, MyHC gene

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