AI Article Synopsis
- The study explores how the rumen microbiome influences nutrient use and feed efficiency in cattle, specifically Angus steers, by dividing them into high and low residual feed intake (RFI) groups.
- Findings show that low-RFI steers had lower bacterial diversity and higher levels of certain metabolites, particularly pantothenate, suggesting a link between specific bacteria and better feed efficiency.
- The research indicates that Flavobacteriia and pantothenate might serve as potential biomarkers for predicting and assessing feed efficiency in steers, highlighting their role in nutrient utilization.
Article Abstract
The rumen microbiome is critical to nutrient utilization and feed efficiency in cattle. Consequently, the objective of this study was to identify microbial and biochemical factors in Angus steers affecting divergences in feed efficiency using 16S amplicon sequencing and untargeted metabolomics. Based on calculated average residual feed intake (RFI), steers were divided into high- and low-RFI groups. Features were ranked in relation to RFI through supervised machine learning on microbial and metabolite compositions. Residual feed intake was associated with several features of the bacterial community in the rumen. Decreased bacterial α- (P = 0.03) and β- diversity (P < 0.001) was associated with Low-RFI steers. RFI was associated with several serum metabolites. Low-RFI steers had greater abundances of pantothenate (P = 0.02) based on fold change (high/low RFI). Machine learning on RFI was predictive of both rumen bacterial composition and serum metabolomic signature (AUC ≥ 0.7). Log-ratio proportions of the bacterial classes Flavobacteriia over Fusobacteriia were enriched in low-RFI steers (F = 6.8, P = 0.01). Reductions in Fusobacteriia and/or greater proportions of pantothenate-producing bacteria, such as Flavobacteriia, may result in improved nutrient utilization in low-RFI steers. Flavobacteriia and Pantothenate may potentially serve as novel biomarkers to predict or evaluate feed efficiency in Angus steers.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6917770 | PMC |
| http://dx.doi.org/10.1038/s41598-019-55978-y | DOI Listing |
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