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Related Experiment Video

Updated: Jun 12, 2025

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Rumen microbiota associated with feed efficiency in beef cattle are highly influenced by diet composition.

Abimael Ortiz-Chura1, Karla Fabiola Corral-Jara1, Jeremy Tournayre1

  • 1Université Clermont Auvergne, INRAE, VetAgro Sup, UMR 1213 Herbivores Unit, Saint-Gènes-Champanelle, France.

Animal Nutrition (Zhongguo Xu Mu Shou Yi Xue Hui)
|June 9, 2025
PubMed
Summary

The rumen microbiome

Keywords:
MetataxonomicsMetatranscriptomicsResidual feed intakeRumen microbiome

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Area of Science:

  • Rumen microbiome research
  • Animal science
  • Microbial ecology

Background:

  • The rumen microbiome's role in nutrient provision suggests a link to feed efficiency variations in ruminants.
  • The precise relationship between microbial structure and host feed efficiency remains unclear.

Purpose of the Study:

  • To investigate if extreme residual feed intake (RFI) phenotypes exhibit distinct microbiome features irrespective of diet.
  • To identify specific microbial taxa and functions associated with feed efficiency in Charolais bulls.

Main Methods:

  • Selection of 32 extreme RFI Charolais bulls from a cohort of 100.
  • Rumen sample collection post-feeding for fermentation, metataxonomic, and metatranscriptomic analyses.
  • Comparison of microbial community structure and function between diets (corn-silage vs. grass-silage) and RFI phenotypes.

Main Results:

  • Microbial community structure differed significantly between diets, and between RFI phenotypes within the grass-silage diet.
  • Specific bacterial genera (Succiniclasticum, Saccharofermentans, Clostridia_258483, CAG-238) were discriminant between RFI phenotypes, with diet-dependent associations.
  • Rumen microbial function did not differ between RFI phenotypes but was influenced by diet.

Conclusions:

  • Rumen microbiome is primarily influenced by diet, with RFI phenotype playing a marginal role.
  • Diet-RFI interactions exist, suggesting specific microbial indicators for RFI require diet context.
  • Identified discriminant microbes may serve as indicators for residual feed intake when diet information is considered.