| |
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
| |
- NA not available
- 1P values among three breeds were calculated using ANOVA, and values with different superscripts were significantly different (P < 0.05)
- 2P values between H- and L-RFI groups were obtained using t test within each breed
