29. Genetic selection of feed efficiency and methane emissions in sheep and cattle in Uruguay: progress and limitations

Navajas, E. A.; Ravagnolo, O.; Barbieri, I. De; Pravia, Maria Isabel; Aguilar, Ignácio; Lema, M.; Vera, B.; Peraza, P.; Marques, Camila Balconi; Velazco, J.; Ciappesoni, Gabriel

doi:10.3920/978-90-8686-940-4_29

Proceedings of 12th World Congress on Genetics Applied to Livestock Production (WCGALP) 2022

DOI: 10.3920/978-90-8686-940-4_29

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29. Genetic selection of feed efficiency and methane emissions in sheep and cattle in Uruguay: progress and limitations

E. A. Navajas

O. Ravagnolo

I. De Barbieri

et al.

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Exploring the Linkage Between Ruminal Microbial Communities on Postweaning and Finishing Diets and Their Relation to Residual Feed Intake in Beef Cattle

Peraza,

Fernández-Calero,

Naya

et al. 2024

Microorganisms

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Feed efficiency significantly impacts the economics of beef production and is influenced by biological and environmental factors. The rumen microbiota plays a crucial role in efficiency, with studies increasingly focused on its relationship with different rearing systems. This study analyzed 324 rumen samples from bulls and steers categorized as high and low efficiency based on residual feed intake. The animals were fed two diets (postweaning and finishing) and rumen samples were sequenced using a reduced representation sequencing (RRS) based approach. The results indicated that diet significantly affected microbial diversity and abundance. In postweaning diets, Actinomycetota, particularly Bifidobacterium, were prevalent, aiding carbohydrate fermentation. In contrast, Acetoanaerobium was identified in finishing diets, likely contributing to acetate production. Additionally, Bacteroides and Butyrivibrio were abundant during postweaning, known for fiber degradation and volatile fatty acid production. Notably, Prevotella and Fibrobacter succinogenes were associated with high feed intake and nutrient utilization, indicating their potential as microbial biomarkers. However, alpha diversity indices showed no significant relationship with feed efficiency, suggesting that diversity alone may not adequately reflect the complexity of feed efficiency phenotypes. These findings highlight the importance of diet and microbial interactions on feed efficiency and suggest further research to explore these microbial contributions to precision feeding strategies.

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Exploring the Linkage Between Ruminal Microbial Communities on Postweaning and Finishing Diets and Their Relation to Residual Feed Intake in Beef Cattle

Peraza,

Fernández-Calero,

Naya

et al. 2024

Microorganisms

View full text Add to dashboard Cite

show abstract

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29. Genetic selection of feed efficiency and methane emissions in sheep and cattle in Uruguay: progress and limitations

Cited by 1 publication

References 10 publications

Exploring the Linkage Between Ruminal Microbial Communities on Postweaning and Finishing Diets and Their Relation to Residual Feed Intake in Beef Cattle

Exploring the Linkage Between Ruminal Microbial Communities on Postweaning and Finishing Diets and Their Relation to Residual Feed Intake in Beef Cattle

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