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Table 6 Coefficients of variation for traits measured in France and Taiwan, for each line and each genotype at the naked neck locus

From: Performance comparison of dwarf laying hens segregating for the naked neck gene in temperate and subtropical environments

 

Control line

Selection line

Traits

NA*N/NA*N 1

NA*NA/NA*N

NA*NA/NA*NA

NA*N/NA*N

NA*NA/NA*N

NA*NA/NA*NA

 

France

Taiwan

France

Taiwan

France

Taiwan

France

Taiwan

France

Taiwan

France

Taiwan

Body weight at 16 weeks

11.7

14.1

8.19

14.9

12.8

6.74

9.48

13.3

12.0

12.1

8.94

11.5

Age at first egg

12.8

8.16

6.4

10.5

6.8

7.33

5.9

9.3

15.4

7.34

5.8

9.02

Clutch length (Trans.)

33.2

28.8

29.6

32.2

31.7

36.9

14.7

28.2

20.7

31.9

17.7

29.1

Egg number at 44 weeks (Trans.)

39.1

41.8

28.9

42.2

30.0

34.4

8.92

29.5

18.9

36.4

21.1

25.2

Laying rate

31.4

30.8

23.1

30.3

22.1

22.7

5.4

20.0

12.3

27.2

16.4

16.9

Adult body weight

14.7

11.5

13.6

13.7

17.2

8.51

8.39

12.5

12.6

11.9

12.5

13.4

Egg weight

9.79

5.3

8.17

8.82

8.64

7.39

7.45

6.66

8.79

8.10

6.44

6.84

  1. The largest relative changes between environments are indicated in bold characters.
  2. 1 NA*N/NA*N: normally feathered; NA*NA/NA*N: heterozygous naked neck; NA*NA/NA*NA: homozygous naked neck