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Agriculture

Sex-Specific Microbiota Associations in Ruminant Livestock

Strategic Insights

— 1 min read

Research on Qinchuan cattle has provided new insights into sex-specific variations in rumen fermentation and microbial differences, which are essential for improving production efficiency and meat quality. The study, conducted by a team of researchers at Northwest A&F University, has shed light on the differences in backfat thickness, eye muscle area, and rumen fermentation between heifers and bulls. The findings have significant implications for livestock management and breeding programs.

Key Takeaways:

  • Heifers exhibited higher backfat thickness, butyrate concentrations, and acetate/propionate ratio, while bulls had larger eye muscle areas and higher propionate concentrations.
  • Volatile fatty acids (VFAs) transport-related genes (CA4, DRA, and NHE1) were more highly expressed in bulls.
  • Heifers showed greater microbial diversity with distinct sex-specific community structures, while bulls had a higher abundance of Prevotella.
  • Bulls were enriched in glycan biosynthesis and amino acid metabolism pathways, whereas heifers showed enhanced lipid metabolism pathways.
  • Backfat thickness was positively correlated with acetate and butyrate production, and acetate/propionate ratio, but negatively correlated with Veillonellaceae_UCG-001.
  • Eye muscle area was negatively correlated with isobutyrate production and the abundance of Elusimicrobium and Anaeroplasma, but positively correlated with Lachnospiraceae_NK3A20_group.
  • The Random Forest model identified key predictors for backfat thickness, including rumen fermentation parameters, microbial taxa, and metabolic pathways, explaining 28% of the variation.

Statistics:

  • 28% of the variation in backfat thickness was explained by the Random Forest model.
  • Heifers showed higher backfat thickness than bulls, with a ratio of 1.23:1.
  • Bulls had larger eye muscle areas than heifers, with a ratio of 1.07:1.
  • The abundance of Prevotella was 2.5 times higher in bulls than in heifers.
  • The abundance of Butyrivibrio and Pseudobutyrivibrio was 2.2 times higher in heifers than in bulls.

Sources:

  • Sex-specific microbiota associations with backfat thickness, eye muscle area, and rumen fermentation in Qinchuan cattle. BMC Microbiology, 2025;25(1):277.
  • BMC Microbiology can be contacted at: Bmc, Campus, 4 Crinan St, London N1 9XW, England. (BioMed Central - www.biomedcentral.com/; BMC Microbiology - www.biomedcentral.com/bmcmicrobiol/)
  • Gege Sun, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, People's Republic of China.
  • Yueting Pan, Guo Li, Shuaicheng Chen, Haibing Liu, Huaxuan Li, Chugang Mei, Wucai Yang, and Linsen Zan, authors of the study.

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