畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (2): 175-182.doi: 10.11843/j.issn.0366-6964.2014.02.002

• 遗传繁育 • 上一篇    下一篇

猪屠宰后几个重要糖酵解代谢控制基因的表达及其与肉质性状的关联性研究

吴泽辉,朱康平,张顺华,唐国庆,帅素容,李明洲,白林,朱砺*,李学伟*   

  1. (四川农业大学动物科技学院,雅安 625014)
  • 收稿日期:2013-08-16 出版日期:2014-02-23 发布日期:2014-02-23
  • 通讯作者: 朱砺,E-mail:zhuli7508@163.com;李学伟,E-mail:lixuewei9125@126.com
  • 作者简介:吴泽辉(1974-),男,四川遂宁人,博士生,主要从事猪的遗传育种研究,E-mail:wuzehui707@163.com
  • 基金资助:

    四川省科技支撑计划项目(2012NZ001;2013NZ0041);教育部留学回国人员科研启动基金项目

Correlation Analysis of the Expression of Main Glycolysis Metabolism Genes and the Meat Quality Traits of Pork

WU Ze-hui,ZHU Kang-ping,ZHANG Shun-hua,TANG Guo-qing,SHUAI Su-rong,LI Ming-zhou,BAI Lin,ZHU Li*,LI Xue-wei*   

  1. (College of Animal Science and Technology,Sichuan Agricultural University,Ya′an 625014,China)
  • Received:2013-08-16 Online:2014-02-23 Published:2014-02-23

摘要:

本研究旨在从糖酵解的角度分析影响肉质性状形成的遗传和生理生化因素。追踪检测了2种肌肉熟化过程中5个时间点的pH和光反射值,以及主要糖代谢物(乳酸、糖原、游离葡萄糖)含量,并采用qRT-PCR检测8种糖酵解代谢控制基因的mRNA表达水平。结果表明,熟化过程中,2种肌肉组织中乳酸含量的变化规律与pH的变化趋势相一致。屠宰初期pH快速下降,乳酸含量迅速上升,持续到48 h时,逐渐趋于稳定。故建议以屠宰后48 h作为终端pH的测定时间更符合生物学实际。所检测的糖酵解代谢控制基因以一种协同作用的方式参与了代谢调控,其mRNA表达量与乳酸含量以及pH等性状间存在显著相关。糖酵解代谢是影响肉质形成的重要过程,尤其以己糖激酶同工酶2(HK-2)和丙酮酸激酶(PKM),以及ATP柠檬酸裂解酶(ACL)和ATP合成酶(ATP5B)基因对肉质性状形成起关键控制作用。

Abstract:

This study aimed to analyze the genetic and physiological and biological factors impacting meat quality traits from the point of glycolysis metabolism.The pH,L value and metabolisms (lactate acid,glycogen and free glucose) content were detected at 5 time-points during the process of aging in two kinds of muscles,and the level of mRNA expression of glycolysis genes were investigated by qRT-PCR.The results showed that, during the process of aging,the lactate acid content kept same change trend with pH.At the beginning of aging,the quickly decrease of pH and increase of lactate acid content lasted for 48 hours,and then gradually keep stable.The suggestion was to measure the terminal pH at 48 h after slaughter.The glycolysis genes detected took part in the metabolism in a coordination way,the mRNA levels correlated with lactate acid content and pH.Glycolysis is important to the meat quality,especially the HK-2 and PKMACL and ATP5B genes are the controlling factors for the meat quanlity.

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