1. Stillbirth, Longevity and Fertility Update

2. Trait Definition
Percent stillbirths in heifers (%SBH), analagous to calving ease (%DBH)
Bases are stillbirths in heifers having bulls
Direct: 11.6% (bulls born in 2000)
Maternal: 13.6% (bulls born in 1995)
Provides “worst case” estimates
Alternative definitions
Calf livability = %SBH

3. Stillbirth Scores by Parity

4. Distribution of PTA

5. Distribution of Reliabilities

6. Product-Moment Correlations (99% Rel, n = 571)

7. Genetic correlations among Interbull evaluations for stillbirth1,27

8. Correlations among domestic and Interbull stillbirth solutions (≥ 90% Rel)8

9. Calf Livability

10. Flat PL Credits 1 2 3 Credit (%) Years 140 120 100 80 60 40 20 1 2 3 41 2 3 4 5
Years

11. Lactation Curve PL Credits
140
120
100 80
Credit (%) 60 40 1 2 3 20 1 2 3 4 5
Years

12. PL Heritabilities and Correlations10 12
None
None +calf
Lac curves
10 mo
.073
.998
.957
.963
.989
12 mo
.069
.956
.961
No limit
.067
.992
.991
None+calf
.068
.995
.070

13. Correlation of PL, Other Traits PTA of bulls born since 1995
Pro
SCS
DPR
Udd
Feet / Leg
Size
DCE
Flat, 305
.07
-.28
.59
.12
.04
-.20
-.26
Curves
.10
-.30
.51
.05
-.21
-.27

14. PL Questions Flat or lactation curve credits?
Use data at 40 instead of 36 mo?
Adjust for inbreeding?
Curve definition passes trend tests with or without adjustment
Increase SD by 1.43?
Test in March, implement in May?

15. Days Open Genetic Correlations Jorjani, 2005 Interbull Bulletin
DFS
ESP
GBR
IRL
NLD
NZL
USA
.91
.75
.93
.76
.89
.82
.90
.83
.84
.96
.85
.80
.70
.88
.73
DFS = Denmark-Finland-Sweden

16. Daughter Conception Rate Genetic Correlations Jorjani, 2005 Interbull Bulletin
CAN
DEU
DFS
FRA
ISR
NLD
.90
.80
.78
.72
.70
.92
.65
.47
.75
.96
.62
.42
.64
DFS = Denmark-Finland-Sweden

17. Have Computer, Need Data