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Table 3 Live weight and carcass characteristics from the replicate floor trials

From: SNP-based breeding for broiler resistance to ascites and evaluation of correlated production traits

Item

n

Live

Hot carcass

Fat pad

Chilled carcass

Weight, kg

Weight, kg

Yield1, %

Weight, kg

Yield, %

Weight, kg

Yield, %

Main effect of trial

 Floor1

453

2814a

1996a

70.94

67.20a

2.402a

2058a

73.13

 Floor2

415

2730b

1941b

71.11

59.53b

2.194b

2002b

73.35

 SEM

 

19

14

0.07

0.88

0.030

14

0.07

Main effect of genetic line

 MAS

439

2795a

1988a

71.12

64.03

2.307

2050a

73.33

 REL

429

2752b

1951b

70.91

63.00

2.297

2013b

73.14

 SEM

 

19

14

0.07

0.91

0.031

14

0.07

Main effect of sex

 Male

395

3117a

2223a

71.33a

65.56a

2.104a

2281a

73.22

 Female

473

2488b

1759b

70.75b

61.81b

2.469b

1823b

73.25

 SEM

 

13

10

0.07

0.91

0.029

10

0.08

Trial × Line

 Floor1 × MAS

233

2826

2010

71.09

67.00

2.385

2072

73.29

 Floor1 × REL

220

2803

1983

70.77

67.42

2.420

2045

72.97

 Floor2 × MAS

206

2761

1964

71.15

60.67

2.218

2025

73.38

 Floor2 × REL

209

2699

1918

71.06

58.41

2.170

1979

73.33

 SEM

 

27

20

0.10

1.36

0.045

20

0.11

Trial × Sex

 Floor1 × Male

204

3174a

2264a

71.29

70.71a

2.236

2322a

73.13

 Floor1 × Female

249

2513c

1773c

70.65

64.31b

2.540

1838c

73.14

 Floor2 × Male

191

3055b

2180b

71.38

60.07c

1.962

2238b

73.32

 Floor2 × Female

224

2460c

1743c

70.87

59.08bc

2.391

1806c

73.38

 SEM

 

19

15

0.10

1.29

0.042

15

0.11

Line × Sex

 MAS × Male

209

3147a

2248a

71.42

66.98

2.128

2306a

73.30

 MAS × Female

230

2476c

1753c

70.84

61.33

2.469

1818c

73.36

 REL × Male

186

3085b

2197b

71.23

63.95

2.076

2255b

73.13

 REL × Female

243

2498c

1764c

70.67

62.27

2.468

1827c

73.15

 SEM

 

21

16

0.10

1.38

0.042

16

0.11

Trial × Line × Sex

 Floor1 x MAS x Male

114

    

2.201cd

  

 Floor1 x MAS x Female

118

    

2.564a

  

 Floor1 x REL x Male

90

    

2.281bcd

  

 Floor1 x REL x Female

127

    

2.518ab

  

 Floor2 x MAS x Male

95

    

2.042de

  

 Floor2 x MAS x Female

111

    

2.369abc

  

 Floor2 x REL x Male

96

    

1.883e

  

 Floor2 x REL x Female

113

    

2.413abc

  

 SEM

     

0.062

  

P-values

 Trial

 

< 0.001

< 0.001

0.078

< 0.001

< 0.001

< 0.001

0.270

 Genetic line

 

0.008

0.003

0.054

0.313

0.618

0.003

0.069

 Sex

 

< 0.001

< 0.001

< 0.001

0.002

< 0.001

< 0.001

0.640

 Trial × Line

 

0.235

0.432

0.293

0.274

0.349

0.468

0.174

 Trial × Sex

 

0.035

0.028

0.514

0.019

0.108

0.036

0.909

 Line × Sex

 

0.011

0.012

0.942

0.200

0.628

0.019

0.915

 Trial × Line × Sex

 

0.980

0.992

0.637

0.093

0.039

0.963

0.889

  1. Abbreviations: Floor1 Floor cohort 1, Floor2 Floor cohort 2, MAS marker-assisted selection line, REL Relaxed (control) line
  2. 1: Yields calculated based on back-dock live weight
  3. Item values with different superscript letters in a column indicate significant difference (p < 0.05) in that trait or effect