Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (10): 4428-4442.doi: 10.11843/j.issn.0366-6964.2024.10.016

• Animal Genetics and Breeding • Previous Articles     Next Articles

Comparative Analysis of the Contents of Amino Acids, Fatty Acids and Volatile Flavor Compounds in the Muscles of Hu Sheep and Their Different Hybrid Combinations

Liwa ZHANG1,2,3(), Yaojing YUE1,2, Xuejiao AN1,2, Jianye LI1,2, Bohui YANG1,2, Zhenfei XU4, Jinxia ZHANG4, Zhiguang GENG4, Yanli GUO3, Rui ZHANG1,2,*()   

  1. 1. Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
    2. Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
    3. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
    4. Qingyang Research Institute of Agricultural Sciences, Qingyang 745000, China
  • Received:2024-01-02 Online:2024-10-23 Published:2024-11-04
  • Contact: Rui ZHANG E-mail:1311722352@qq.com;zhangrui03@caas.cn

Abstract:

The aim of this study was to analyze the differences in muscle cholesterol, amino acids, fatty acids and volatile flavor compounds between Hu sheep and their hybrid combinations. Sixteen male lambs each of Hu×Hu (HH), Poll Dorset×Hu (TH) and Southdown×Hu (NH) F1. generations were selected at about 3 months of age, and were reared in a single pen under the same nutritional level and feeding management conditions, and the experiment lasted for a total of 95 days (with a pre-test period of 15 days). At the end of the feeding trial, seven test lambs from each group that were close to the average weight of the group were selected for slaughter, and the longissimus dorsi was collected for the determination of cholesterol, amino acids, fatty acids, and volatile flavor substances content. The results were showed as follows: Muscle cholesterol content in NH group was significantly higher than that in TH group (P < 0.05); A total of 17 amino acids were identified in the muscle of the three groups. Among essential amino acids, the contents of threonine, isoleucine, phenylalanine and lysine in TH and NH groups were extremely significantly higher than those in HH group (P < 0.01); Among non-essential amino acids, the contents of serine, histidine and proline in TH and NH groups were extremely significantly higher than those in HH group (P < 0.01), while the contents of aspartic acid and arginine were significantly higher than those in HH group (P < 0.05). The contents of sweet amino acid and umami amino acid in NH group were significantly higher than those in HH group (P < 0.05). Thirty fatty acids were identified in the muscles of all three groups. Among the saturated fatty acids, the contents of stearic acid and behenic acid in group HH were significantly higher than those in group NH (P < 0.05), and among the monounsaturated fatty acids, the cil-10-pentadecanoic acid was significantly higher in the NH group than in the HH group (P < 0.05). Among polyunsaturated fatty acids, the arachidonic acid content was significantly higher (P < 0.05) in the HH group than in the TH group, while C20:5n3 content in HH group was significantly higher than that in NH group; A total of 33 volatile flavor substances were identified in muscle of the three groups. The content of 2-heptanol in NH group was significantly higher than that in TH and HH groups, the content of 3-hydroxy-2-butanone in HH group was significantly higher, and the content of thiazole in TH group was significantly higher. The content of 2-heptanone was significantly lower than that in HH group (P < 0.05). In summary, the progeny muscles of local Hu sheep by crossing breed with Poll Dorset and Southdown have more desirable cholesterol, amino acid and fatty acid contents as well as rich volatile flavor substances, which provide a reference for local high-quality lamb meat production.

Key words: Hu sheep, Southdown×Hu F1 generation, Poll Dorset×Hu F1 generation, amino acid, fatty acid, cholesterol, volatile flavor compounds

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