ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2016, Vol. 47 ›› Issue (10): 1986-1994.doi: doi: 10.11843/j.issn.0366-6964.2016.10.006

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Association of the MyoG and PID1 Gene Expression with Intramuscular Fat Content in Sheep Muscles  

LUAN Zhao-jin 1,2,HE Jian-ning 1,CHENG Ming 3,LIU Kai-dong 3,QU Xu-xian 4,LIU Nan 1*   

  1. (1.College of Animal Science and Technology,Qingdao Agricultural University,Qingdao 266109, China;2.Baotou Agricultural Research Institute, Baotou 014013, China;3.Institute of Animal Husbandry and Veterinary Medicine of Qingdao,Qingdao 266121,China;4.Station of the Shandong Animal Husbandry and Veterinary,Jinan 250000,China)
  • Received:2016-02-03 Online:2016-10-23 Published:2016-10-23

Abstract:

The objectives of this study were to investigate the developmental changes of Myogenin (MyoG) and Phosphotyrosine interaction domain containing 1 (PID1) mRNA expression in different parts of muscles in sheep and research its effect on intramuscular fat (IMF) accumulation.Five Aohan fine wool sheep were slaughtered at 2,4,5,6,12 months,respectively,to collect samples from longissimus dorsi and biceps femoris,for determining the IMF content.The mRNA expression of the MyoG and PID1 in 2 parts of muscles was investigated by real-time PCR,and association between their mRNA levels and IMF contents were also analyzed.The results showed that,2-5 month,with growing of the age,the IMF contents of longissimus dorsi and biceps femoris increased.And 5-12 month,the IMF contents remained unchanged.The IMF content of longissimus dorsi were extremely significantly higher than biceps femoris (P<0.01) at the same age.MyoG and PID1 mRNA expression level was different in 2 parts of muscles and had tissues-dependent.In longissimus dorsi, MyoG expression level was the highest (P<0.01) in 5 month old sheep,PID1 expression level was the highest (P<0.05) in 6 month old sheep,there was an increase and then decrease trend in the 2 gene expression.In biceps femoris,the MyoG and PID1 expression level difference was extremely significant(P<0.01) among different month ages,and MyoG expression level presented increased and declined slowly with growing,PID1 expression level presented declined-increased with growing.In the same month,MyoG and PID1 expression level had significant difference in different parts.Correlation analysis showed that MyoG and PID1 expression level was inordinately positively related to IMF content.In conclusion,MyoG expression has positively effect on IMF accumulation in sheep,and PID1 expression is likely to influence on IMF accumulation.

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