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Table 5 QTL significant at the chromosome-wise level in a Hampshire x Landrace cross

From: Genome-wide identification of quantitative trait loci in a cross between Hampshire and Landrace II: Meat quality traits

Chr

Trait

n

Position (cM)

F-value

Additive

effect ± SE

Dominance

effect ± SE

Model

1

Estrone

138

123

5.6*

36 ± 157

-537 ± 199

HRNT

2

Acid

53

0

9.2**

-9.8 ± 2.4

13.8 ± 8.4

HRNT

 

Water content in LD

175

0

5.5*

-0.3 ± 0.1

0.7 ± 0.4

HSRNT

 

Warner-Bratzler shear force in LD

289

141

5.4*

5.5 ± 2.4

-4.5 ± 3.2

HSRNT

3

Estrone

138

0

6.8**

364 ± 260

-845 ± 385

HRNT

 

Warner-Bratzler shear force in LD

289

2

6.2*

-9.3 ± 4.2

-22.3 ± 6.6

HSRNT

 

Water content in LD

175

142

7.6*

-0.3 ± 0.1

-0.2 ± 0.1

HSRNT

 

Colour a*

289

150

5.8*

0.2 ± 0.1

0.5 ± 0.2

HSRNT

 

Log glycogen 24 h p.m.

111

166

7.1**

-0.01 ± 0.02

-0.13 ± 0.04

HSRNT

4

PSE spots in LD 24 h p.m.

289

115

4.9*

0.03 ± 0.05

0.2 ± 0.1

HSRNT

5

Colour NPPC

288

147

7.0**

0.2 ± 0.1

0.03 ± 0.09

HSRNT

6

Intramuscular fat in LD

175

54

7.0*

-0,2 ± 0.1

-0.1 ± 0.1

HSRNT

 

Drip loss in LD day 3–4 p.m. (24 h)

289

58

7.3*

0.5 ± 0.1

0.5 ± 0.2

HSRNT

 

Freezing and cooking loss in LD

289

70

8.3**

1.1 ± 0.3

0.7 ± 0.4

HSRNT

 

Total impression

53

120

8.9*

-8.0 ± 2.5

13.7 ± 3.8

HRNT

 

ΔpH/h 3 h to 5 h p.m.

204

147

5.6*

-0.03 ± 0.01

-0.03 ± 0.01

HSRNT

8

Colour NPPC

288

42

5.4*

-0.4 ± 0.1

-0.5 ± 0.2

HSRNT

9

Estrone

138

22

5.7*

394 ± 199

-411 ± 250

HRNT

 

Chewing time

53

27

6.5*

-0.7 ± 2.9

-23.0 ± 6.5

HRNT

 

Tenderness

53

29

6.7*

1.3 ± 4.2

33.3 ± 9.3

HRNT

 

Total impression

53

32

8.0**

3.3 ± 2.0

15.6 ± 4.4

HRNT

10

ΔpH/h 45 min to 3 h p.m.

279

45

5.3*

-0.04 ± 0.01

-0.02 ± 0.02

HSRNT

 

ΔpH/h 45 min to 5 h p.m.

216

41

4.6*

-0.02 ± 0.01

0.00 ± 0.01

HSRNT

 

PSE spots ham 24 h p.m.

289

49

5.1*

-0.2 ± 0.1

-0.2 ± 0.1

HSRNT

 

Internal reflectance SM 24 h p.m.

289

89

4.6*

-1.5 ± 1.2

-5.4 ± 1.8

HSRNT

 

Colour a*

289

122

5.0*

0.1 ± 0.2

-0.9 ± 0.3

HSRNT

11

Estrone

138

5

4.4*

76 ± 193

620 ± 238

HRNT

 

Log androstenone

139

95

5.4*

-0.1 ± 0.2

0.6 ± 0.3

HRNT

12

pH LD 5 h p.m.

225

50

8.1**

-0.1 ± 0.0

-0.2 ± 0.0

HSRNT

 

ΔpH/h 45 min to 3 h p.m.

279

51

6.3*

0.03 ± 0.01

0.05 ± 0.01

HSRNT

 

Internal reflectance BF 24 h p.m.

289

88

5.5*

3.3 ± 1.1

3.6 ± 1.4

HSRNT

13

Intramuscluar fat in LD

175

30

5.2*

0.06 ± 0.04

0.2 ± 0.1

HSRNT

 

pH BF 24 h p.m.

289

47

7.2*

0.01 ± 0.01

0.07 ± 0.02

HSRNT

 

Appearance

53

114

8.0*

7.8 ± 2.0

-1.8 ± 3.2

HRNT

 

Acid

53

123

6.9*

3.8 ± 1.6

-7.6 ± 2.7

HRNT

14

Log androstenone

139

40

5.8**

0.3 ± 0.1

0.0 ± 0.1

HRNT

 

Estrone

138

105

4.7*

-214 ± 187

406 ± 266

HRNT

15

Intramuscular fat in LD

175

0

6.1*

0.2 ± 0.1

0.4 ± 0.1

HSRNT

 

pH LD 5 h p.m.

225

65

5.9*

0.1 ± 0.0

0.04 ± 0.04

HSRNT

 

pH BF 24 h p.m.

289

75

6.6*

0.01 ± 0.02

0.07 ± 0.02

HSRNT

 

PSE spots LD 24 h p.m.

289

76

6.7*

-0.2 ± 0.1

-0.04 ± 0.06

HSRNT

 

PSE spots ham 24 h p.m.

289

91

5.6*

-0.0 ± 0.1

0.4 ± 0.1

HSRNT

16

Drip loss in LD day 3–7 p.m. (4 days)

268

31

6.9*

-0.07 ± 0.1

-0.6 ± 0.2

HSRNT

 

Drip loss in LD day 3–4 p.m. (24 h)

289

31

5.2*

-0.1 ± 0.1

-0.4 ± 0.1

HSRNT

 

Appearance

53

101

5.3*

-2.9 ± 2.5

-17.9 ± 5.8

HRNT

18

Log glycogen 2 h p.m.

111

12

8.5**

0.1 ± 0.0

-0.04 ± 0.04

HSRNT

  1. **1% chromosome-wise significance
  2. *5% chromosome-wise significance
  3. LD – M. longissimus dorsi
  4. SM – M. semimembranosus
  5. BF – M. biceps femoris
  6. p.m.-post mortem
  7. The additive effect was defined as the estimated phenotypic difference between animals homozygous for the Hampshire allele and the mean of the two homozygotes.
  8. The dominance effect was calculated as the phenotypic deviation of the heterozygotes from the mean of the two homozygotes.
  9. Model: H = Herd, S = Sex, RN = PRKAG3/RN-genotype, T = Stunning procedure.