Table 5 Repeatable plasma metabolites and parameters in growing-fattening bulls fed ad libitum (0–70 days) and then restricted (77–147 days) (Group A) or vice versa (Group B).

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

 

Repeatability#

High repeatability (0.7 ≤ r ≤ 0.9)1

 3-Methyl-histidine

0.91

 Alkaline phosphatase (ALP)

0.90

 Betaine

0.78

 Carnosine

0.78

 1-Methyl-histidine

0.76

 Indoleacetic acid*

0.76

Moderate repeatability (0.4 ≤ r < 0.7)1

 Homoarginine

0.69

 δ13C

0.68

 Creatinine

0.66

 Alpha-aminoadipic acid

0.65

 Aspartate transaminase (AST)

0.64

 Lactic acid

0.63

 Glutamate

0.61

 Glucose

0.60

 5-Aminovaleric acid

0.59

 Tryptophane

0.58

 β-Aminobutyric acid*

0.57

 Alanine transaminase (ALT)

0.56

 Symmetric dimethylarginine

0.55

 Indolepropionic acid*

0.55

 Anserine

0.49

 IGF-1

0.48

 δ15N

0.48

 Arginine

0.47

 Trans-4-hydroxyproline

0.47

 Kynurenine

0.47

 Valine

0.44

 Tyrosine

0.43

 Alanine

0.42

 Asymmetric dimethylarginine

0.41

  1. #Repeatability defined as the tendency of individuals to maintain their ranking over time based on the plasma concentration of metabolites and calculated as the intraclass correlation coefficient (see “Methods”).
  2. 1According to Martin and Bateson, 1986.
  3. *Microbial origin.