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Table 3 The proportion of overlapped top 1% heifersa when using prop-EG and mTHL-EG as environmental gradients (EGs) in reaction norm models (RNM) with the H matrix in Holstein cattle

From: Genotype-by-environment interaction in Holstein heifer fertility traits using single-step genomic reaction norm models

EGb

AFCc

IFL

CR

Prop-EG

mTHI-EG

S1d

S2

S1

S2

S1

S2

0.2

43.03

76.47%

82.69%

72.92%

64.37%

29.63%

36.63%

0.4

48.29

84.57%

87.35%

81.24%

77.69%

59.60%

51.50%

0.6

52.34

88.24%

82.02%

85.68%

78.91%

65.82%

60.93%

0.8

55.54

83.02%

75.47%

80.69%

75.47%

65.70%

62.93%

1

67.02

82.24%

76.03%

79.69%

74.92%

64.04%

60.27%

  1. a Heifers were selected based on gEBV and accuracy of estimation (> 0.4)
  2. b prop-EG using the number of days that exceeding the threshold temperature humidity index in the period as EG, mTHI-EG using the minimum temperature humidity index of a day of the critical period as EG
  3. c AFC Age at first calving, IFL Interval from the first to last service, CR Conception rate of first service
  4. d S1 reference period, S2 periods selected based on the Akaike’s information criterion