畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (10): 1986-1994.doi: doi: 10.11843/j.issn.0366-6964.2016.10.006

• 遗传繁育 • 上一篇    下一篇

绵羊肌肉组织MyoGPID1 基因的表达及其与肌内脂肪含量的关系

栾兆进1,2,贺建宁1,程明3,刘开东3,曲绪仙4,柳楠1*   

  1. (1.青岛农业大学动物科技学院,青岛 266109;2.包头市农业科学研究所,包头 014013;3.青岛市畜牧兽医研究所,青岛 266121;4.山东省畜牧总站,济南 250000)
  • 收稿日期:2016-02-03 出版日期:2016-10-23 发布日期:2016-10-23
  • 通讯作者: 柳楠,教授,博士,E-mail:nanliu@sina.com
  • 作者简介:栾兆进(1991-),女,山东青岛人,硕士生,主要从事动物遗传育种与繁殖研究,E-mail:15264246691@163.com
  • 基金资助:

    山东省良种工程项目(2011-16)

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

摘要:

本研究旨在探究绵羊不同部位肌肉MyoGPID1基因mRNA的发育变化规律,分析MyoGPID1 基因mRNA表达水平对肌内脂肪沉积的影响。选取2、4、5、6 月龄敖汉细毛羊公羔和12月龄敖汉细毛羊成年公羊各5只,屠宰后取背最长肌和股二头肌检测肌内脂肪(Intramuscular fat,IMF)含量,用实时荧光定量 PCR 检测两个部位肌肉MyoGPID1 mRNA 表达量,并进一步分析表达量与肌内脂肪含量的关系。结果表明,2~5月龄时,背最长肌和股二头肌的IMF含量均随着月龄的增加而增加;而5~12月龄时则基本保持不变;同月龄背最长肌IMF 含量极显著高于股二头肌(P<0.01)。两个部位肌肉MyoGPID1 mRNA 表达的发育模式有所不同,具有组织特异性。背最长肌MyoG基因表达量5月龄最高(P<0.01),PID1基因表达量6月龄最高(P<0.05),均呈上升-下降趋势;股二头肌MyoGPID1基因各月龄之间表达量均差异极显著(P<0.01),MyoG 基因表达量随着月龄增长呈上升-下降趋势,PID1基因表达量大体呈下降-上升趋势。同月龄MyoG和PID1 表达量存在组织差异。相关分析表明,MyoGPID1 表达量与 IMF 含量呈不同程度正相关。综上,MyoG基因表达对绵羊肌内脂肪的沉积可能有正调控作用,而PID1基因表达可能对肌内脂肪的沉积产生一定的影响。

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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