Skip to main content

Table 4 Estimates of inbreeding depression for all significant traits, expressed as the difference (Diff) in predicted phenotype between lowly inbred (5% percentile) and highly inbred (95% percentile) from the mean for FPED, FROH and FGRM

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

Traitsa

FPEDb

FROHb

FGRMb

Low

High

Diff

Low

High

Diff

Low

High

Diff

MY (kg)

9031.89

8887.20

144.69

9152.62

8809.77

342.85

9233.88

8798.11

435.77

FY (kg)

357.35

354.09

3.26

359.29

354.25

5.04

362.09

355.00

7.10

PY (kg)

294.74

292.17

2.57

296.79

289.71

7.08

299.54

289.33

10.21

AFS (day)

450.51

456.91

−6.40

451.04

457.75

−6.71

451.13

456.52

−5.39

NSc

37.03

39.48

−2.45

35.34

40.21

−4.87

35.75

40.58

−4.83

NRRd

70.27

69.55

0.72

70.61

68.05

2.56

70.49

67.68

2.81

FSTC (day)

19.47

22.30

−2.83

18.22

22.34

−4.12

18.43

22.30

−3.87

NSc (%)

52.43

55.99

−3.56

53.67

54.71

−1.04

53.30

55.12

−1.82

NRRd (%)

54.50

52.58

1.92

54.60

53.46

1.14

54.43

53.36

1.07

  1. aMY 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
  2. bFPED = pedigree inbreeding; FROH = segment-based genomic inbreeding; FGRM = marker-by-marker-based genomic inbreeding
  3. cIncidence of more than one service after first
  4. dIncidence of no subsequent service between 15 and 56 days following the first service