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Table 3 QTL with significant marginal effects on body-weight and growth traits.

From: Genetic analysis of an F2 intercross between two chicken lines divergently selected for body-weight

QTL

Trait1

Chr:cM

F-value2

a ± SE3

d ± SE3

Var4

Growth1

GR56-70

1:442

18.1*

25.4 ± 4.2

1.8 ± 6.5

4.4

 

BW70

1:445

11.6*

59.0 ± 12.2

5.0 ± 8.2

2.9

 

GR42-56

1:450

6.4†

14.5 ± 4.2

5.0 ± 6.2

1.6

 

BW56

1:452

7.3†

34.2 ± 9.2

7.8 ± 13.6

1.8

 

GR0-14

1:469

7.0†

2.6 ± 0.8

-2.3 ± 1.3

1.6

 

BW14

1:470

6.6†

2.4 ± 0.8

-2.7 ± 1.3

1.5

Growth4

BW14

3:61

9.1*

2.5 ± 0.7

-3.0 ± 1.1

2.1

 

GR0-14

3:61

9.3*

2.4 ± 0.7

-3.1 ± 1.1

2.2

Growth6

GR42-56

4:31

9.0*

16.3 ± 3.9

-2.7 ± 5.9

2.2

 

GR56-70

4:32

9.0*

15.9 ± 3.7

1.9 ± 5.7

2.3

 

BW70

4:32

10.9*

51.4 ± 11.1

-7.2 ± 16.9

2.7

 

BW56

4:33

9.8*

36.3 ± 8.3

-10.6 ± 12.6

2.4

 

GR14-28

4:34

8.5†

8.3 ± 2.1

-3.7 ± 3.1

2.0

 

BW28

4:34

8.2†

10.0 ± 2.5

-3.9 ± 3.8

1.9

 

BW42

4:34

6.8†

18.3 ± 5.1

-7.1 ± 7.7

1.7

Growth7

GR28-42

4:86

6.8†

12.8 ± 3.5

-1.5 ± 5.1

1.7

Growth9

GR14-28

7:54

7.2†

6.1 ± 2.3

-9.0 ± 3.4

1.7

 

BW28

7:55

7.8†

8.2 ± 2.7

-10.4 ± 4.1

1.8

 

GR56-70

7:55

6.5†

12.2 ± 4.0

-10.9 ± 6.0

1.6

 

BW42

7:76

9.2*

23.1 ± 5.5

-8.8 ± 8.0

2.3

 

GR28-42

7:77

8.1†

13.1 ± 3.3

-4.7 ± 4.9

2.0

 

BW56

7:78

11.9*

43.2 ± 9.0

-12.0 ± 13.0

2.9

 

BW70

7:78

10.3*

53.6 ± 11.9

-11.6 ± 17.3

2.6

 

GR42-56

7:81

9.3*

17.7 ± 4.1

0.2 ± 5.8

2.3

Growth12

BW28

20:46

6.5†

10.5 ± 2.9

1.3 ± 4.4

1.5

 

BW42

20:54

7.0†

22.4 ± 6.1

-4.9 ± 9.8

1.7

 

GR0-14

20:54

10.9*

3.8 ± 0.8

0.9 ± 1.3

2.5

 

BW14

20:55

10.0*

3.7 ± 0.8

0.6 ± 1.3

2.3

  1. 1Growth rate (GR) measured as difference between body-weight measurements; body-weight (BW) was measured (in grams) at 14, 28, 42, 56 and at 70 days of age.
  2. 2 * 5% genome-wide, † genome-wide suggestive significance level.
  3. 3The additive effect (a) represents half of the phenotypic difference between the two homozygous genotype classes (i.e. HH-LL) and the dominance effect (d) is defined as the average deviation of the heterozygotes (HL) from the phenotypic mean of the two homozygous genotypes.
  4. 4% of residual phenotypic variance explained by the QTL.