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Table 1 Means (± SD) for growth, feed efficiency, and carcass traits for the high and low RFI cohortsa

From: Identification of QTL regions and candidate genes for growth and feed efficiency in broilers

Traitsb

High RFI

Low RFI

BW28 (g)

1231 ± 81

1195 ± 82

BW42 (g)

2448 ± 166

2428 ± 134

ADFI (g/d)

176.3 ± 11.3**

156.3 ± 8.4

ADG (g/d)

86.95 ± 9.57

88.07 ± 5.86

RFI (g/d)

9.39 ± 3.48**

 − 10.71 ± 2.06

RFIa (g/d)

9.99 ± 2.86**

 − 7.13 ± 2.81

FCR (g/g)

2.04 ± 0.12**

1.78 ± 0.05

CW (g)

2184 ± 156

2164 ± 109

BrW (g)

518.0 ± 42.1

546.1 ± 49.5

ThW (g)

395.7 ± 48.0

394.4 ± 31.3

AbF (g)

31.61 ± 10.24**

20.48 ± 8.65

CWP (%)

89.18 ± 0.84

89.67 ± 2.83

BrP (%)

21.17 ± 1.06

22.47 ± 1.29**

ThP (%)

16.12 ± 1.11

16.23 ± 0.52

AbP (%)

1.30 ± 0.42**

0.84 ± 0.35

  1. aHigh RFI group (n = 15) consisting of samples from generation 6 of male broilers with the highest RFI values and low RFI group (n = 15) with the lowest RFI values; **P < 0.01
  2. bBW28, body weight at 28 d of age; BW42, body weight at 42 d of age; ADFI, average daily feed intake; ADG, average daily gain; RFI, residual feed intake; RFIa, residual feed intake adjusted for weight of abdominal fat; FCR, feed conversion ratio; CW, carcass weight; BrW, breast muscle weight; ThW, thigh muscle weight; AbF, weight of abdominal fat; CWP, percentage of carcass weight; BrP, percentage of breast muscle; ThP, percentage of thigh muscle; AbP, percentage of abdominal fat
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Genetics Selection Evolution

ISSN: 1297-9686