Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (9): 3029-3041.doi: 10.11843/j.issn.0366-6964.2022.09.019

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

Effect of Allium mongolicum Regel and Its Extract on the Metabolomic Characteristics of Perirenal Adipose Tissue Typical Odor and Flavor Substances in Captive Meat Sheep

LIU Wangjing1, TANG Defu1*, AO Changjin2*   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Received:2022-03-21 Online:2022-09-23 Published:2022-09-23

Abstract: This experiment aimed to investigate the characterization of perirenal adipose tissue metabolomics of captive meat sheep with different typical odor and flavor levels. The experiment was divided into four groups with 15 lambs each, of which each test group was fed with Allium mongolicum Regel powder(AMR), Allium mongolicum Regel water extract (AWE), and Allium mongolicum Regel ethanol extract (AFE), respectively, and the control group (CK) was fed with the basal diet. At the end of the experiment, six sheep were randomly selected from each group for slaughter, and samples of perirenal adipose tissue (PF), tail adipose tissue (TF), dorsal subcutaneous adipose tissue (DF), and omental adipose tissue (GF) were collected to measure the deposition of 4-alkyl branched-chain fatty acids (BCFA), which were used as a basis for screening samples with extremely high and low odor and flavor. LC-MS was used to investigate the characterization of perirenal adipose tissue metabolomics of captive meat sheep with different typical odor and flavor levels. The results showed that, the addition of AMR, AWE, or AFE to the sheep diet reduced the content of 3 kinds of BCFA in the DF, PF, and GF to different degrees except for TF, and AFE had a stronger influence in terms of its effect on PF (MOA P<0.001; MNA P=0.044; EOA P<0.001, respectively). Metabolomics revealed that the histidine metabolism, glycerophospholipid metabolism, arginine and proline metabolism, linoleic acid metabolism, and their related metabolites might be related to the synthesis of typical odor and flavor-related substances. In conclusion, AFE may improve the typical odor and flavor of lamb by modulating the fatty acid and amino acid metabolic pathways in the body of captive meat sheep, which further affects the synthesis of 4-alkyl branched-chain fatty acids.

Key words: sheep, adipose tissue, metabolomics, typical odor and flavor, 4-alkyl-branched-chain fatty acids

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