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Table 2 Average percentage of QTL fixation in generation 40 across the two parental breeds for different selection criteria and genetic models

From: Balanced selection on purebred and crossbred performance increases gain in crossbreds

Model

 

w = 0

w = 0.25

w = 0.5

w = 0.75

w = 1

Model 1 (Purebred training)

Total

33.37

35.25

36.12

38.25

40.37

Common

70.14

68.29

67.48

65.23

62.80

Alternate

29.85

31.70

32.51

34.76

37.19

Favorable

63.77

63.63

63.07

62.61

61.09

Unfavorable

36.22

36.36

39.92

37.40

38.91

Model 1 (Crossbred training)

Total

41.50

46.12

49.00

50.00

50.50

Common

61.28

57.30

56.58

55.93

55.48

Alternate

38.71

42.69

43.41

44.06

44.51

Favorable

60.39

59.82

59.46

59.00

58.55

Unfavorable

39.60

40.17

40.53

40.92

41.44

Model 2

Total

39.00

40.00

40.87

42.37

42.62

Common

67.23

66.64

65.63

64.23

62.16

Alternate

32.76

33.35

34.36

35.77

37.83

Favorable

63.25

63.27

63.13

61.75

61.20

Unfavorable

36.74

36.72

36.86

38.24

38.81

Model 3

Total

31.00

32.87

34.75

36.50

38.87

Common

72.47

70.69

69.15

66.26

63.46

Alternate

27.52

29.30

30.84

33.73

36.53

Favorable

65.03

64.75

64.31

63.24

62.17

Unfavorable

34.96

35.25

35.69

36.75

37.83

  1. Total fixation was calculated as the percentage of QTL that were fixed for either allele in the last generation. The general criterion for the selection of purebred parents was \(SC_{i} = \left( {1 - w} \right) \cdot {\text{GEBV}}_{iP} + w \cdot {\text{GEBV}}_{iC}\). Training in genetic Models 2 and 3 was on purebred data