Table 2

Animal performance in response to a high-starch (HiS) or low-starch (LoS) diet during a 112-d growing phase.

Treatments

HiS

LoS

P value

Item

Angus

A × S

Angus

A × S

SEM

Diet

Steer type

Diet × Steer type

Body weight (kg)

Birth

39.9

40.5

36.3

40.1

1.6

0.23

0.20

0.34

Initial, d 0

165

177

135

195

15

0.36

0.26

0.39

d 56

243

254

196

268

14

0.27

0.02

0.07

Final, d 112

331

352

294

373

16

0.61

0.01

0.10

ADG (kg/d)

0 to 56 d

1.40

1.38

1.08

1.32

0.07

0.02

0.15

0.09

56 to 112 d

1.56

1.73

1.74

1.86

0.08

0.11

0.11

0.75

0 to 112 d

1.48

1.56

1.41

1.59

0.07

0.77

0.10

0.47

Dry matter intake (kg/day)

0 to 56 d

6.34

6.24

5.88

7.79

0.42

0.23

0.06

0.04

56 to 112 d

7.45

7.42

8.04

9.56

0.52

0.03

0.18

0.17

0 to 112 d

6.73

6.75

6.77

8.56

0.45

0.07

0.04

0.05

NE_G intake (Mcal/day)¹

0 to 56 d

9.07

8.93

6.99

9.27

0.56

0.16

0.09

0.06

56 to 112 d

10.6

10.6

9.57

11.4

0.67

0.81

0.21

0.21

0 to 112 d

9.77

9.67

8.13

10.2

0.57

0.36

0.12

0.09

Residual feed intake

-0.63

-1.58

1.22

1.10

0.62

0.006

0.41

0.52

Feed efficiency² (kg/kg)4

0 to 56 d

0.22

0.22

0.18

0.17

0.02

0.04

0.68

0.75

56 to 112 d

0.21

0.24

0.22

0.19

0.01

0.29

0.86

0.14

0 to 112 d

0.22

0.23

0.21

0.18

0.01

0.09

0.77

0.35

Day 112 ultrasound

Marbling score

4.37

3.97

4.90

4.05

0.24

0.21

0.06

0.39

Back fat (mm)

0.21

0.16

0.14

0.13

0.03

0.16

0.43

0.62

Muscle depth (mm)

53.4

51.8

53.0

48.9

3.3

0.61

0.52

0.74

¹ Estimated from actual dry matter intake (kg/day) × calculated NE_G (1.19 or 1.43 Mcal/kg diet dry matter for HiS or LoS).

²ADG/feed intake.

Graugnard et al. BMC Genomics 2009 10:142   doi:10.1186/1471-2164-10-142