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Table 2 Quantitative trait loci for growth rate at different ages

From: Comparative analysis of quantitative trait loci for body weight, growth rate and growth curve parameters from 3 to 72 weeks of age in female chickens of a broiler–layer cross

Chromosome

Position (cM)

F ratio1

CI2

Flanking markers

Additive effect ± SE

Dominance effect ± SE

VP (%)3

Growth rate at 3–6 weeks of age, (g/d)

1

130

14.1**

95 – 237

LEI0068-LEI0146

1.48 ± 0.28

-0.06 ± 0.40

4.7

2

282

10.2**

15 – 382

ROS0074-ADL0114

1.34 ± 0.30

0.59 ± 0.49

3.3

3

49

17.2**

23 – 128

MCW0083-HUJ0006

2.11 ± 0.36

0.52 ± 0.66

5.9

3

237

7.1

13 – 266

MCW0040-LEI0166

0.61 ± 0.30

1.51 ± 0.46

2.2

4

0

11.2**

0 - 37

ADL0317-MCW0295

1.29 ± 0.27

-0.27 ± 0.40

3.7

4

163

21.0**

140 - 183

ADL0241-MCW0180

3.33 ± 0.51

0.83 ± 1.38

7.2

6

11

7.5

0 – 45

ROS0062-ROS0003

0.54 ± 0.33)

-1.82 ± 0.54

2.4

11

0

7.1

0 – 67

LEI0110-MCW0097

1.02 ± 0.27

0.37 ± 0.39

2.2

13

57

4.5

19 – 71

MCW0340-ADL0225

1.31 ± 0.42

-0.57 ± 0.88

1.4

Growth rate at 6–12 weeks of age, (g/d)

1

578

7.5*

65 - 601

ADL0183-MCW0107

1.63 ± 0.51

2.96 ± 1.44

2.6

3

13

9.8*

0 – 158

MCW0169-MCW0083

1.48 ± 0.36

-1.16 ± 0.65

3.9

4

168

27.0**

146 – 183

ADL0241-MCW0180

3.49 ± 0.48

0.01 ± 1.16

2.6

9

97

5.6

0 – 121

MCW0135-ROS0030

0.38 ± 0.37

-2.24 ± 0.72

1.9

27

0

10.7**

-

ROS0071

1.18 ± 0.28

0.62 ± 0.39

3.9

Growth rate at 12–24 weeks of age, (g/d)

8

15

9.7**

7- 87

ROS0026-MCW0305

0.98 ± 0.26

0.93 ± 0.38

4.6

Growth rate at 24–48 weeks of age, (g/d)

3

2

8.8*

1 – 266

MCW0169-MCW0083

0.70 ± 0.18

-0.45 ± 0.26

4.0

3

221

8.7*

3 – 236

ADL0237-MCW0040

0.35 ± 0.16

-0.91 ± 0.24

4.0

4

183

6.6

29 – 183

ADL0241-MCW0180

0.63 ± 0.19

0.46 ± 0.36

2.9

28

42

6.1

0 - 42

ROS0085-ADL0299

0.48 ± 0.16

-0.40 ± 0.24

2.7

Growth rate at 48–72 weeks of age, (g/d)

2

365

7.8

138 – 383

MCW0056-MCW0157

-2.74 ± 13.35

8.06 ± 4.33

3.7

4

12

6.0

0 – 183

ADL0317-MCW0295

-0.04 ± 22.41

7.45 ± 11.85

2.7

7

92

7.6

0 – 93

LEI0064-ROS0019

-7.75 ± 26.28

3.21 ± 18.35

3.6

  1. 1 Significant at 0.05 (*) and 0.01 (* *) levels experiment-wide, and () suggestive.
  2. 2 CI = 95% confidence interval.
  3. The position on the chromosome with supporting F-values, additive and dominance effects and the proportion of phenotypic variance (VP) explained by QTL at successive intervals from 3 to 72 weeks of age for an F2 broiler-layer cross. Dominance effects in bold are >2 SE (P < 0.05).