Acta Agriculturae Boreali-Sinica ›› 2022, Vol. 37 ›› Issue (1): 202-210. doi: 10.7668/hbnxb.20192650

Special Issue: Animal husbandry Hot Article

• Animal Husbandry·Fisheries·Veterinarian • Previous Articles     Next Articles

Effect of Low Protein Diet on Meat Quality and Myogenic Regulatory Factor Gene Expression of Xiangdong Black Goats

CHEN Wenxun1,2, ZHOU Ting3, YAN Qiongxian1, TIAN Lina1,2, CAO Manhu3, TAN Zhiliang1, ZOU Aihua4   

  1. 1. Institute of Subtropical Agriculture,the Chinese Academy of Sciences,CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region,Hunan Provincial Key Laboratory of Nutritional Physiology and Metabolic Process, Changsha 410125,China
    2. University of Chinese Academy of Science,Beijing 100049,China
    3. College of Animal Science and Technology,Hunan Agricultural University,Changsha 410128,China
    4. Taoyuan County Agricultural Comprehensive Administrative Law Enforcement Bureau,Changde 415700,China
  • Received:2021-11-12 Published:2022-02-28

Abstract:

The aim of this study was to investigate the effects of low protein diet on meat quality,amino acid and fatty acid composition of skeletal muscle and blood,and mRNA expression of myogenic regulatary factor genes of black goat.A total of 24 female Xiangdong black goats were randomly divided into control group(CON,10.77% CP,n=12)and low protein group(LP,5.52% CP,n=12).The pre and post-trial lasted for 25 d and 45 d,respectively.The results were as follows:Low protein diet increased L* 24 h of meat color,but had no difference on pH value and water loss rate.The percentage of type Ⅰ muscle fiber and type Ⅱ muscle fiber had no difference between two groups,only the average fiber cross sectional areas of semitendinosus had a tendency to reduce.Valine,leucine,lysine,phenylalanine,glutamate and total essential amino acids of vastus lateralis significantly reduced,isoleucine,methionine,aspartate,arginine and total amino acid tended to decrease.Glutamate of semitendinosus in the LP group significantly reduced,threonine and serine tended to decrease.Compared with the control group,C20:2 and C22:1n9 of semitendinosus in the LP group significantly decreased.Total PUFA,C18:1n9c,and C20:4n6 of vastus lateralis in the LP group significantly decreased;C18:1n9c of longissimus dorsi in the LP group significantly decreased.Compared with the control group,the mRNA expression of MYOD in semitendinosus were significantly down-regulated in the CON group.In conclusion,low protein diet didn't affect type conversion and cross sectional area of muscle fiber.Dietary protein deficiency reduced the deposition of amino acid in muscle,while reduced the deposition of polyunsaturated fatty acids in muscle,which affected on muscle flavor of goat.

Key words: Xiangdong black goat, Low protein, Meat quality, Amino acids, Fatty acids

Cite this article

CHEN Wenxun, ZHOU Ting, YAN Qiongxian, TIAN Lina, CAO Manhu, TAN Zhiliang, ZOU Aihua. Effect of Low Protein Diet on Meat Quality and Myogenic Regulatory Factor Gene Expression of Xiangdong Black Goats[J]. Acta Agriculturae Boreali-Sinica, 2022, 37(1): 202-210. doi: 10.7668/hbnxb.20192650.

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