ArticleJournal of animal science and biotechnology2025
Multi-omics analysis reveals host-microbe interactions driving divergent energy allocation strategies in Tibetan sheep under cold-season feeding regimes.
Article in Journal of animal science and biotechnology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Conjoint Analysis of Sheep Microbiome, Metabolome, and Transcriptome Revealed the Effect Mechanisms of Feeding with Broccoli Extract.Veterinary sciences · 2026Article
- Integrated metabolome and microbiome analysis deciphers the effects of resveratrol and β-hydroxy-β-methylbutyric acid on jejunal function under different protein levels in Tibetan sheep.Microbiology spectrum · 2026Article
- Effect of altitudes on serum parameters, metabolome, and gut microbiota in yaks on the Qinghai-Tibet Plateau.Microbiology spectrum · 2026Article
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6 authors.
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Abstract
backgroundAs an indigenous livestock species on the Tibetan Plateau, Tibetan sheep exhibit remarkable adaptability to low temperatures and nutrient-scarce environments. During the cold season, Tibetan sheep are typically managed under two feeding regimes: barn feeding (BF) and traditional grazing (TG). However, the molecular mechanisms underlying their adaptation to these distinct management strategies remain unclear. This study aimed to investigate the adaptive strategies of rumen function in Tibetan sheep to cold-season feeding regimes by integrating analyses of rumen morphology, microbiome, metabolome, and transcriptome. Twelve healthy Tibetan sheep with similar body weights were assigned into two groups (BF vs. TG). At the end of the experiment, rumen tissues were subjected to histological observation. Multi-omics techniques were employed to evaluate the effects of cold-season feeding regimes on rumen function in Tibetan sheep.
resultsThe ruminal papilla height, width, and muscular thickness were significantly higher in BF group. The relative abundances of Actinobacteria and Succiniclasticum were significantly elevated in the rumen of BF group, whereas Rikenellaceae, Gracilibacteria, and Lachnospiraceae showed higher abundances in the TG group. Metabolomic analysis identified 19 differential metabolites between the two groups, including upregulated compounds in BF group (fumaric acid, maltose, L-phenylalanine, and L-alanine) and TG group (e.g., phenylacetic acid, salicyluric acid and ferulic acid). These metabolites were predominantly enriched in phenylalanine metabolism, alanine, aspartate and glutamate metabolism, and phenylalanine, tyrosine and tryptophan biosynthesis pathways. Additionally, 210 differentially expressed genes (DEGs) were identified in rumen epithelium: 100 upregulated DEGs in the BF group were enriched in nutrient metabolism-related pathways (e.g., fatty acid degradation and PPAR signaling pathway), while 110 upregulated DEGs in the TG group were associated with immune-related pathways (e.g., p53 signaling pathway and glutathione metabolism).
conclusionsAmong these, we observed distinct rumen functional responses to different cold-season feeding regimes in Tibetan sheep and revealed energy allocation strategies mediated by host-microbe interactions. In the BF group, Tibetan sheep adopted a "metabolic efficiency-priority" strategy, driving rumen microbiota to maximize energy capture from high-nutrient diets to support host growth. In contrast, the TG group exhibited an "environmental adaptation-priority" strategy, where rumen microbiota prioritized cellulose degradation and anti-inflammatory functions, reallocating energy toward homeostasis maintenance at the expense of rumen development and growth performance.
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