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

• Basic Research • Previous Articles     Next Articles

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

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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