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Table 2 Descriptive statistics for growth, feed efficiency, and metabolizable efficiency traits of broilers

From: New insights into the associations among feed efficiency, metabolizable efficiency traits and related QTL regions in broiler chickens

Traits1 N Mean SD Min Max CV, %
RFI, g/d 180 0.00 5.69 −16.72 17.03
FCR, g:g 180 1.89 0.09 1.62 2.23 4.59
ADFI, g/d 180 167.95 14.46 119.07 198.36 8.61
BW28, g 180 1254.67 91.02 970.00 1530.00 7.25
BW42, g 180 2499.08 166.43 2020.00 2855.00 6.66
ADG, g/d 180 88.89 8.55 61.43 107.86 9.61
DEW, g/d 180 40.65 3.84 29.24 50.20 9.45
GEE, kcal/d 180 155.63 14.84 110.07 196.19 9.54
CPE, g/d 180 11.90 1.40 8.33 16.41 11.78
MDM, g/d 180 103.35 9.04 72.84 123.29 8.75
AMEn, kcal/d 180 448.94 39.37 317.20 532.27 8.77
MCP, g/d 180 18.38 1.64 12.84 22.82 8.91
Coefficient of MDM, % 180 71.80 1.09 68.67 75.71 1.52
Coefficient of AMEn, % 180 71.42 0.97 68.34 74.57 1.36
Coefficient of MCP, % 180 60.81 2.57 53.15 67.12 4.23
AbF, g 180 30.66 10.41 7.70 61.90 33.96
AbP, % 180 1.22 0.39 0.38 2.27 32.12
  1. 1RFI 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; CV coefficient of variation