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Table 5 Fertility rates (%) and hatchability rates (%) in selected (S) and control (C) Brown Tsaiya duck lines of G12, as a function of the number of days following a single artificial insemination (AI) with pooled Muscovy semen, and values of Student-Fisher t (1)

From: Eleven generations of selection for the duration of fertility in the intergeneric crossbreeding of ducks

 

Duck line

Nb of ducks

Number of days after AI

   

2

3

4

5

6

7

8

9

10

11

12

13

14

15

F/Ie

S

150

91

94

92

92

86

87

81

75

58

42

26

12

4

3

 

C

83

85

87

74

69

52

36

26

13

8

5

1.6

1.5

0

0.5

 

t(1)

 

1.3

1.7

3.4

4.2

5.5

8.6

9.5

12.1

10.0

7.9

6.4

3.5

2.5

1.6

H/Ie

S

150

53

60

59

61

56

48

41

44

35

27

16

7

2

1.2

 

C

83

59

58

54

48

38

26

15

9

7

5

1

2

0

0

 

t(1)

 

-0.9

0.3

0.7

1.9

2.7

3.5

4.6

6.8

5.8

5.1

4.7

1.9

1.7

1.3

  1. Fertility rate (%): F/Ie *100, ratio of number of fertile eggs (F) to the number of eggs set (Ie); Ie per day varied between 395 and 417 eggs in the S line, between 179 and 209 eggs in the C line
  2. Hatchability rate (%): H/Ie *100, ratio of number of hatched mule ducklings (H) to the number of eggs set (Ie)
  3. t(1): difference of fertility and hatchability rates between S and C duck lines, divided by standard deviation of the difference
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Genetics Selection Evolution

ISSN: 1297-9686