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Table 1 Phenotypes of three beef breeds used in the present study

From: Comparative metagenomic and metatranscriptomic analyses reveal the breed effect on the rumen microbiome and its associations with feed efficiency in beef cattle

  Angus (n = 16) Charolais (n = 16) (mean ± SEM) Kinsella composite hybrid (n = 16) P value1
Residual feed intake (RFI; kg/day)
 Overall 0.15 ± 0.21 0.06 ± 0.24 − 0.10 ± 0.24 0.73
 L-RFI (n = 8) − 0.58 ± 0.10 − 0.81 ± 0.10 − 0.96 ± 0.10  
 H-RFI (n = 8) 0.88 ± 0.15 0.92 ± 0.12 0.76 ± 0.13  
P value2 1.46e−06 1.87e−08 6.43e−08  
Dry matter intake (DMI; kg/day)
 Overall 10.73 ± 0.27a 10.33 ± 0.28a 9.27 ± 0.28b 3.23e−03
 L-RFI (n = 8) 10.19 ± 0.34 9.49 ± 0.24 8.98 ± 0.34  
 H-RFI (n = 8) 11.35 ± 0.31 11.17 ± 0.29 9.67 ± 0.43  
P value2 0.03 5.80e−04 0.23  
Eating frequency (n/day)
 Overall 37.63 ± 1.61a 36.59 ± 1.56a 29.73 ± 1.99b 6.30e−03
 L-RFI (n = 8) 41.25 ± 1.53 35.56 ± 2.65 29.94 ± 2.02  
 H-RFI (n = 8) 33.49 ± 2.13 37.63 ± 1.77 29.44 ± 4.18  
P value2 9.90e−03 0.53 0.91  
Empty rumen weight (kg)
 Overall 13.02 ± 0.59a 11.29 ± 0.29b NA 1.36e-02
 L-RFI (n = 8) 12.42 ± 0.80 11.15 ± 0.38 NA  
 H-RFI (n = 8) 13.62 ± 0.87 11.43 ± 0.47 NA  
P value2 0.33 0.65 NA  
  1. NA not available
  2. 1P values among three breeds were calculated using ANOVA, and values with different superscripts were significantly different (P < 0.05)
  3. 2P values between H- and L-RFI groups were obtained using t test within each breed