2. AAA Reproductive Database
AMERICAN ANGUS ASSOCIATION
AAA Reproductive Database
Sally L. Northcutt
Genetic Research Director
American Angus Association

3. What’s in the Future? Reproductive Traits Heifer Pregnancy
Research Initiatives
Reproductive Traits
Heifer Pregnancy
Stayability/Cow Longevity

4. Breeding Season for a cow/heifer
Breeding Records
Breeding Season for a cow/heifer AI AI
Pasture
Pasture
End
Date
Begin
Date
Events in a cow’s reproductive life
Breeding dates
Preg check/days preg (heifer data encouraged)
Opens recorded
Disposal code and date

5. AAA Login: Entry Performance Breeding Data

6. Offline Entry: Breeding Records

7. AIMS: Breeding

8. AIMS: Breeding Data

10. Distribution of Heifer Pregnancy EPDs, %
No. Sires
EPD, %
American Angus Association (February 2006)

11. Distribution of Stayability EPDs, %
274,541 records
EPDs expressed as a difference in % stayability
735 Main sire example
EPDs % to +23% ACC to .96
No. Sires
EPD, %
American Angus Association (February 2006)

12. Angus Stayability Stay 3 Correlated with Stay 6
749 main sires ACC .16 to .98 Corr = .50
196 sires, ACC >= .70 Corr = .75
Stay 3, %
Stay 6, %
EPDs Mean Min Max Range

13. Reproduction Colorado State University
Heifer Pregnancy Genetic Evaluation
Data edits and review of variance components
Models for EPD calculations
Research has been initiated

14. HP
STAY

15. Reproductive Measures
$Value Indexes
Reproduction
Weaned Calf $W
Postweaning
$F $G $B
Heifer Pregnancy & Stayability
Calving Interval, Days to Calving
% Unassisted Births
Gestation Length
Breeding Data Collection
Reproductive Measures

16. It’s a Cow’s Life Breeding records Cow disposal information
Pregnancy check results
Calving data

17. AAA Reproductive Database
AMERICAN ANGUS ASSOCIATION
AAA Reproductive Database
Sally L. Northcutt
Genetic Research Director
American Angus Association