Acta Veterinaria et Zootechnica Sinica ›› 2021, Vol. 52 ›› Issue (3): 723-732.doi: 10.11843/j.issn.0366-6964.2021.03.016

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

The Developmental Changes of Ileal Microbiota and Fatty Acid Binding Proteins and Its Correlation with Fat Deposition in Jinhua Pigs

WANG Yuanxia1, LIU Xiuting2,3, ZHANG Xiaojun4, XIANG Yun4, XU E1, LÜ Wentao2,3, YANG Hua2,3, XIAO Yingping2,3*   

  1. 1. College of Animal Science, Guizhou University, Guiyang 550025, China;
    2. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Hangzhou 310021, China;
    3. Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
    4. Institute of Animal Husbandry and Veterinary Medicine, Jinhua Academy of Agricultural Sciences, Jinhua 321017, China
  • Received:2020-08-24 Online:2021-03-23 Published:2021-03-24

Abstract: The objective of this study was to investigate the developmental changes of ileal microbiota and fatty acid binding proteins and its correlation with fat deposition in Jinhua pigs. Four healthy Jinhua pigs at 45(D45), 90(D90), 150(D150)and 270 (D270) days of age were selected, respectively to measure their body weight and backfat thickness. The ileal mucosa and contents were collected. The expression of fatty acid binding protein genes in the ileal mucosa was measured by fluorescent quantitative PCR, and ileal microbiota were analyzed using high-throughput sequencing based on 16S rRNA gene. The results showed:1) The weight and backfat thickness of Jinhua pigs increased significantly with age increasing (P<0.05); 2) The expression of fatty acid binding protein genes FABP1, FABP2 and FABP4 in the ileal mucosa showed significant increase with age increasing (P<0.05); 3) Firmicutes and Bacteroidetes were the predominant phyla in the ileum of Jinhua pigs. At the genus level, Clostridium sensu stricto 1, Lactobacillus,Terrisporobacter, Romboutsia and Streptococcus were the dominant bacteria; With age increasing, the relative abunance of Clostridium sensu stricto 1 and Streptococcus increased at first and then decreased while Lactobacillus, Terrisporobacter and Romboutsia decreased at first and then increased. PCoA analysis showed that there were significantly different clusters at each age. 4) Spearman correlation analysis showed that the correlation coefficients of the expression levels of fatty acid binding proteins FABP1, FABP2 and FABP4 with backfat thickness were 0.480 1, 0.597 9 and 0.795 3, respectively; The correlation coefficients of Epulopiscium and Mycoplasma with fatty acid binding proteins FABP1, FABP2 and FABP4 in the ileum and backfat thickness of Jinhua pigs were 0.38-0.76 and 0.45-0.64, respectively. It is concluded that the developmental changes were observed for the ileal microbiota and the expression of fatty acid binding protein, which were asscociated with fat deposition in Jinhua pigs.

Key words: Jinhua pig, ileal microbiota, fatty acid binding protein, developmental changes, fat deposition

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