|
Traits2
|
Low-RFI
|
High-RFI
|
Low-RFI /High-RFI, %3
|
|---|
|
RFI, g/d
|
−7.52 ± 2.71
|
8.17 ± 3.31**
|
− 192.04
|
|
FCR, g:g
|
1.81 ± 0.06
|
1.99 ± 0.08**
|
−9.05
|
|
ADFI, g/d
|
161.39 ± 13.13
|
175.02 ± 14.33**
|
−7.79
|
|
BW28, g
|
1261.39 ± 112.43
|
1245.28 ± 81.29
|
1.29
|
|
BW42, g
|
2513.06 ± 174.62
|
2481.94 ± 166.53
|
1.25
|
|
ADG, g/d
|
89.40 ± 7.31
|
88.33 ± 9.53
|
1.21
|
|
DEW, g/d
|
38.63 ± 3.26
|
42.78 ± 4.04**
|
−9.70
|
|
GEE, kcal/d
|
148.96 ± 12.91
|
162.95 ± 15.29**
|
−8.59
|
|
CPE, g/d
|
11.10 ± 1.19
|
12.92 ± 1.40**
|
−14.09
|
|
MDM, g/d
|
99.74 ± 8.31
|
107.28 ± 8.53**
|
−7.03
|
|
AMEn, kcal/d
|
431.56 ± 35.86
|
467.73 ± 37.64**
|
−7.73
|
|
MCP, g/d
|
18.00 ± 1.43
|
18.64 ± 1.51
|
−3.43
|
|
Coefficient of MDM, %
|
72.11 ± 0.86**
|
71.52 ± 0.89
|
0.82
|
|
Coefficient of AMEn, %
|
71.44 ± 0.80
|
71.40 ± 0.73
|
0.06
|
|
Coefficient of MCP, %
|
61.97 ± 1.93**
|
59.17 ± 2.21
|
4.73
|
|
AbF, g
|
27.03 ± 9.5
|
33.36 ± 11.4*
|
−18.97
|
|
AbP, %
|
1.06 ± 0.34
|
1.34 ± 0.43**
|
−20.90
|
- 1low-RFI from male broilers with the 20% lowest RFI, n = 36 and high-RFI with the 20% highest RFI, n = 36; *P < 0.05, **P < 0.01
- 2RFI residual feed intake; FCR feed conversion ratio; ADFI average daily feed intake; BW28 body weight at 28 d of age; BW42 body weight at 42 d of age; ADG average daily gain; DEW dry excreta weight; GEE gross energy excretion; CPE, crude protein excretion; MDM metabolizable dry matter; AMEn nitrogen corrected apparent metabolizable energy; MCP metabolizable crude protein; AbF weight of abdominal fat; AbP percentage of abdominal fat
- 3Relative difference between low-RFI and high-RFI calculated as 100×(low-RFI mean/high-RFI mean − 1)
