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Table 2 Estimates of phenotypic variance and ratios with respect to phenotypic variance for additive genetic (h2), herd within region-year-season (hrys2), service sire by year of insemination (ss2), artificial insemination technician (tech2), and residual (e2) variances (standard errors in parentheses)

From: Effect of recent and ancient inbreeding on production and fertility traits in Canadian Holsteins

Traitsa

Phenotypic variance

h2 (%)

hrys2 (%)

tech2 (%)

ss2 (%)

e2 (%)

MY (kg)

2,740,757

26.02 (1.89)

28.17 (0.90)

  

45.81 (1.79)

FY (kg)

4889.50

22.57 (1.77)

31.98 (0.90)

  

45.45 (1.68)

PY (kg)

2663.70

21.69 (1.67)

33.35 (0.90)

  

44.96 (1.60)

AFS_H (day)

2410.50

4.25 (0.67)

60.24 (0.56)

  

35.51 (0.71)

NS_H

0.87

1.96 (0.42)

6.81 (0.54)

  

91.23 (0.67)

NRR_H

0.21

1.31 (0.25)

2.78 (0.47)

1.44 (0.03)

0.56 (0.16)

93.91 (0.58)

FSTC_H (day)

1118.60

2.12 (0.47)

6.20 (0.55)

  

91.68 (0.70)

CTFS_C (day)

594.27

6.59 (1.13)

39.90 (1.01)

  

53.51 (1.32)

NS_C

1.65

4.21 (0.85)

2.78 (0.46)

  

93.01 (1.08)

NRR_C

0.25

3.07 (0.58)

2.33 (0.59)

0.64 (0.33)

0.03 (0.12)

93.93 (0.81)

FSTC_C (day)

1920.90

3.19 (0.93)

3.18 (0.69)

  

93.63 (1.13)

  1. a MY milk yield, FY fat yield, PY protein yield, AFS_H age at first service for heifers, NS_H number of service for heifers, NRR_H 56-day non-return rate for heifers, FSTC_H first service to conception for heifers, CTFS_C conception to first service for cows, NS_C number of service for cows, NRR_C 56-day non-return rate for cows, FSTC_C first service to conception for cows