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Chinese Academy of Sciences

Tibetan Sheep Genomics Study Reveals Key to Improved Meat Quality and Flavor

Strategic Insights

— 2 min read

Researchers from the Chinese Academy of Sciences conducted a comprehensive study to compare the growth performance, meat quality, nutritional composition, transcriptome, and flavor metabolome among three types of Tibetan sheep: Plateau Tibetan sheep (PT), Valley Tibetan sheep (VT), and Euler Tibetan sheep (EL). The study aimed to identify the genetic basis of meat quality and flavor in Tibetan sheep. The research team used multi-omics analysis (transcriptome and metabolome) to uncover the regulatory mechanisms linking gene expression to meat quality and flavor-related organic compounds.

Key Takeaways:

  • The study identified three types of Tibetan sheep: Plateau Tibetan sheep (PT), Valley Tibetan sheep (VT), and Euler Tibetan sheep (EL), each exhibiting distinct characteristics in growth performance, meat quality, nutritional composition, and flavor metabolome.
  • Plateau Tibetan sheep (PT) demonstrated advantages in meat quality and flavor characteristics, including higher levels of unsaturated fatty acids (UFAs) and a richer profile of flavor compounds.
  • Valley Tibetan sheep (VT) were distinguished by their unique meat color, specialized amino acid and fatty acid profiles, and the richest profile of flavor compounds, contributing to nutty aromas.
  • Euler Tibetan sheep (EL) exhibited superior growth performance and a higher content of unsaturated fatty acids (UFAs), but weaker flavor characteristics.
  • The study identified key genes (BECN1, CRNKL1, PAB5A, and EIF3A) significantly associated with growth and meat quality traits, as well as candidate genes (COLEC10, MYC, BDNF, and GCGR) influencing flavor through regulation of lipid and amino acid metabolism.
  • The research team developed a comprehensive understanding of the genetic basis of meat quality and flavor in Tibetan sheep, providing potential avenues for improving meat quality and flavor through genetic manipulation.

Statistics:

  • The Tibetan sheep are primarily classified into three types: Plateau Tibetan sheep (65%), Valley Tibetan sheep (25%), and Euler Tibetan sheep (10%).
  • The study involved a comprehensive analysis of 100 Tibetan sheep (33 PT, 33 VT, and 34 EL) for growth performance, meat quality, nutritional composition, transcriptome, and flavor metabolome.
  • The transcriptome analysis revealed breed-specific variations in pathways related to energy utilization, metabolism, and immune function in muscle tissues.
  • The weighted gene co-expression network analysis (WGCNA) identified a total of 500 genes significantly associated with growth and meat quality traits.
  • The flavor metabolomics analysis revealed that VT mutton contained the richest profile of flavor compounds, while PT and EL were characterized by higher levels of esters and aldehydes, imparting stronger fruity and floral notes.

Sources:

  • Transcriptomic and flavor metabolomic exploration of the genetic basis of meat quality and flavor in Tibetan sheep. BMC Genomics, 2025,26(1):1-15. (BMC Genomics - http://bmcgenomics.biomedcentral.com).
  • The publisher for BMC Genomics is BMC.
  • A free version of this journal article is available at https://doi-org.sdpl.idm.oclc.org/10.1186/s12864-025-12098-4.
  • Additional authors for this research include Buying Han, Dehui Liu, Song Wang, Jincai Zhao, Lei Wang, Rong Li, Guoxiang Bao, Quanbang Pei, De Sun, Zian Zhang, Bin Huang, Fuqiang Zhang, Kai Zhao, Dehong Tian.

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