Table 1 Descriptive statistics (mean, SD, min and max) in feedlot beef cattle for feed efficiency, performance and carcass traits

Feed efficiency traits:

Average daily gain (ADG), kg d^-1

726

1.70

0.385

0.71

3.30

Mid-test metabolic weight (MMWT), kg

726

92.4

11.70

53.3

128.1

Daily dry matter intake (DMI), kg d^-1

726

9.81

1.76

4.18

15.54

Residual feed intake (RFI), kg d^-1

726

-0.066

1.126

-3.70

3.35

Feed conversion ratio (FCR), kg gain kg^-1 DM

726

6.09

1.87

3.11

16.76

Carcass traits:

Hot carcass weight (HCW), kg

959

353.7

52.47

208

503

Longissimus muscle area (LMA), cm²

848

94.3

14.61

59.4

138.4

Lean meat within the rib section (LR), %

664

54.6

6.79

25.0

75.2

Lean yield grade (LY), %

846

60.1

2.78

51.0

65.0

Fat1 (F1), mm

850

13.4

5.62

1.0

30.0

Fat2 (F2), mm

850

15.7

6.49

1.0

36.0

Fat3 (F3), mm

847

9.6

3.66

1.0

22.0

Grade fat (GRF), mm

846

8.8

3.25

1.0

19.0

Proportion of intermuscular fat (IFR) within the rib section, %

687

10.09

3.22

1.2

20.5

Proportion of body cavity fat within the rib section (BFR), %

684

3.48

1.244

0.96

7.30

Proportion of subcutaneous fat from the rib section (SQFR), %

685

10.30

2.60

2.44

18.53

Marbling score^b

851

4.90

0.734

3.0

6.0