Some plasma biomarkers of residual feed intake in beef cattle remain consistent regardless of intake level - IRSTEA - Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (<b>anciennement Cemagref</b>) Access content directly
Journal Articles Scientific Reports Year : 2024

Some plasma biomarkers of residual feed intake in beef cattle remain consistent regardless of intake level

Quelques biomarqueurs plasmatiques de la consommation résiduelle chez le taurillon en engraissement restent robustes quelque soit le niveau d'ingestion

Abstract

Abstract This study investigated whether plasma biomarkers of residual feed intake (RFI), identified under ad libitum feeding conditions in beef cattle, remained consistent during feed restriction. Sixty Charolais crossbred young bulls were divided into two groups for a crossover study. Group A was initially fed ad libitum (first test) and then restricted (second test) on the same diet, while Group B experienced the opposite sequence. Blood samples were collected from the 12 most divergent RFI animals in each group at the end of the first test and again after the second test. 12 plasma variables consistently increased, while three consistently decreased during feed restriction (FDR < 0.05). Only two metabolites, α-aminoadipic acid for Group A and 5-aminovaleric acid for Group B, were associated with RFI independent of feed intake level (FDR < 0.05), demonstrating moderate-to-high repeatability across feeding levels (intraclass correlation coefficient ≥ 0.59). Notably, both metabolites belong to the same metabolic pathway: lysine degradation. These metabolites consistently correlated with RFI, irrespective of fluctuations in feed intake, indicating a connection to individual metabolic processes influencing feed efficiency. These findings suggest that a portion of RFI phenotypic variance is inherent to an individual’s metabolic efficiency beyond variations in feed intake.
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hal-04544483 , version 1 (16-04-2024)

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Gonzalo Cantalapiedra-Hijar, K. Nedelkov, P. Crosson, M. Mcgee. Some plasma biomarkers of residual feed intake in beef cattle remain consistent regardless of intake level. Scientific Reports, 2024, 14 (1), pp.8540. ⟨10.1038/s41598-024-59253-7⟩. ⟨hal-04544483⟩
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