1. 2001 ADSA annual meeting, July 2001 (1) Timeliness of progeny-testing through AI and percentage of bulls returned to service (abstract 1020) H.D. NORMAN,* R.L. POWELL, J.R. WRIGHT Animal Improvement Programs Laboratory Agricultural Research Service, USDA Beltsville, MD 20705-2350, USA C.G. SATTLER National Association of Animal Breeders Columbia, MO 66205-1033, USA

2. 2001 ADSA annual meeting, July 2001 (2) Successful progeny testing (PT)  Select bulls with high pedigree merit  Early semen collection  Rapid semen distribution and use in milk-recorded herds  Daughters with unique ID, recorded pedigrees, and kept until milking

3. 2001 ADSA annual meeting, July 2001 (3) PT accuracy and impact  Accuracy of PT evaluations  Number of daughters  Daughter distribution across herds  Impact on genetic improvement  Number of bulls sampled  Intensity of culling of PT bulls

4. 2001 ADSA annual meeting, July 2001 (4) Objectives  Summarize characteristics of PT programs related to timeliness of genetic evaluation  Examine distribution of PT daughters  Determine selection intensity after evaluation of PT bulls

5. 2001 ADSA annual meeting, July 2001 (5) Data sources  National database at AIPL, ARS, USDA  Yield information from DHI  ID information from DHI and breed associations  Bull entry into PT programs and semen distribution dates from NAAB

6. 2001 ADSA annual meeting, July 2001 (6) PT definition  AI organization in US  (exception: Semex USA)  Bulls aged 10-29 mo at semen release  NAAB sampling controller codes 1-222  Daughters born 8-42 mo after bull entry into AI sampling  Usable 1st-lactation record  First 125 based on calving date

7. 2001 ADSA annual meeting, July 2001 (7) Number of PT bulls (major studs) YearAyrBSGueHolJerMS 1970 2 219 233 171 1975 3 820 563 352 1980133323 826 231 1985191641 969 521 1990 7304011911033 199514302613731343 1998 821181219 952

8. 2001 ADSA annual meeting, July 2001 (8) Bull age (mo) at semen distribution Year*AyrBSGueHolJer 1975-791916171617 1980-841916 17 1985-89191516 1990-941816 1995-991816 *Year of bull entry into AI sampling

9. 2001 ADSA annual meeting, July 2001 (9) Bull age SD (mo) at semen distribution Year*AyrBSGueHolJer 1975-793.63.83.62.83.2 1980-843.73.12.93.03.3 1985-894.92.53.22.82.9 1990-944.13.33.42.43.4 1995-993.22.82.4 2.8 *Year of bull entry into AI sampling

10. 2001 ADSA annual meeting, July 2001 (10) Bull age (mo) at daughter birth Year*AyrBSGueHolJer 1970-743942383338 1975-793940373238 1980-843940353235 1985-893938353033 1990-9436 342932 *Year of bull entry into AI sampling

11. 2001 ADSA annual meeting, July 2001 (11) Bull age SD (mo) at daughter birth Year*AyrBSGueHolJer 1970-746.45.04.65.74.6 1975-794.83.84.15.14.9 1980-844.23.8 5.24.4 1985-894.34.04.44.53.5 1990-944.04.33.93.23.9 *Year of bull entry into AI sampling

12. 2001 ADSA annual meeting, July 2001 (12) Bull age (mo) at daughter calving Year*AyrBSGueHolJer 1970-746870666164 1975-796968656064 1980-8468 636062 1985-896866625759 1990-946564625658 *Year of bull entry into AI sampling

13. 2001 ADSA annual meeting, July 2001 (13) Bull age SD (mo) at daughter calving Year*AyrBSGueHolJer 1970-746.25.54.75.94.9 1975-794.73.84.15.35.1 1980-844.34.0 5.44.4 1985-894.24.04.54.63.7 1990-944.14.44.03.34.1 *Year of bull entry into AI sampling

14. 2001 ADSA annual meeting, July 2001 (14) PT daughter age (mo) at calving Year*AyrBSGueHolJer 1970-7429 28 27 1975-793028 26 1980-8429 28 26 1985-892928 2726 1990-9428 2726 *Year of bull entry into AI sampling

15. 2001 ADSA annual meeting, July 2001 (15) PT daughters (no.) Year*AyrBSGueHolJer 1960-64 5751486756 1965-6910056645560 1970-74 7271534748 1975-79 9345524861 1980-84 6130524864 1985-89 4443405660 1990-94 4428316149 *Year of bull entry into AI sampling

16. 2001 ADSA annual meeting, July 2001 (16) Herd distribution (%) by herd PT use Herd PT use Year*0%1-19%20-49%50-99%100% 1965851141<.1 1975682291<.1 19855632111.1 19905135122.1 19954139163.3 19983938185.4 *Year of first calving

17. 2001 ADSA annual meeting, July 2001 (17) PT cows (%) by herd PT use Herd PT use Year*<10%10-19%20-49%50-99%100% 196518323811.1 19751931446.1 19852033407.3 199018323812.6 1995142742151.0 1998112441231.1 *Year of first calving

18. 2001 ADSA annual meeting, July 2001 (18) PT bulls (%) returned to AI service Year*AyrBSGueHolJer 1963-677148364446 1968-725788444550 1973-776762323956 1978-824651362038 1983-873746281926 1988-922319221419 *Year of bull entry into AI sampling

19. 2001 ADSA annual meeting, July 2001 (19) Conclusions  Slight increase in age of PT bull at semen release  Decrease in age of PT bulls at daughter birth  4.5 mo for Holsteins and Jerseys  Decrease in age of PT bulls at daughter calving  6 mo for Holsteins  5.5 mo for Jerseys

20. 2001 ADSA annual meeting, July 2001 (20) Conclusions (cont.)  Decrease in herds with no PT records usable for genetic evaluation  85%  39%  Increase in herds with usable PT records  1-19% PT use: 11%  38%  >50% PT use: 1%  5%  1 in 7 PT bulls returned to active service not 1 in 10 PT  Active AI?