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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (11): 140-154.DOI: 10.11686/cyxb2023008

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Meat quality and nutritional indexes of three muscles of the F1 generation of crossbred sheep (Suffolk×river valley-type Tibetan) raised under grazing conditions

Meng-jun LIU1,2(), Yue REN1,2()   

  1. 1.Institute of Livestock Research,Tibet Academy of Agricultural and Animal Husbandry Sciences,Lhasa 850000,China
    2.Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau,Ministry of Agriculture and Rural Affairs,Lhasa 850000,China
  • Received:2023-01-05 Revised:2023-02-23 Online:2023-11-20 Published:2023-09-27
  • Contact: Yue REN

Abstract:

The aim of this study was to investigate the quality and nutritional characteristics of meat from the F1 generation of crossbred Suffolk×river valley-type Tibetan sheep. The meat color, cooked meat rate, pH, conventional nutritional indexes, and contents of minerals, cholesterol, vitamin A, vitamin E, vitamin B1, vitamin B2, amino acids, and fatty acids in three muscles (longissimus dorsi, brachial triceps, and biceps femoris) were determined. It was found that there were some differences in meat quality among three different muscles of the crossbred F1 generation, mainly in meat color and the contents of crude protein, zinc, amino acids, and fatty acids. In CIE-Lab color analyses, the meat color L* (lightness) value was significantly higher for the longissimus dorsi and triceps brachii than for the biceps femoris (P<0.05), the meat color a* value was significantly higher for the longissimus dorsi and biceps femoris than for the triceps brachii (P<0.05), and the meat color b* value was significantly higher for the longissimus dorsi than for the triceps brachii and biceps femoris (P<0.05). The crude protein content was significantly higher in the longissimus dorsi than in the triceps brachii (P<0.05), and the zinc content was significantly higher in the triceps brachii than in the longissimus dorsi and biceps femoris. The glutamate content was significantly higher in the triceps brachii than in the longissimus dorsi (P<0.05), and the histidine content was significantly higher in the longissimus dorsi than in the biceps femoris and triceps brachii (P<0.05). The palmitic acid content was significantly higher in the longissimus dorsi and biceps femoris than in the triceps brachii (P<0.05). The arachidonic acid content was significantly higher in the brachialis triceps than in the longissimus dorsi (P<0.05). In conclusion, the fresh taste amino acid content was slightly higher in the brachial triceps than in the longissimus dorsi, and the quality of the longissimus dorsi was better than that of the brachial triceps and biceps femoris. The nutritional values of the three muscles were similar, and all of them met the human healthy diet standards.

Key words: F1 generation of Suffolk crossed with river valley type Tibetan sheep, grazing, different parts, meat quality, nutrient composition