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2001 Interbull, August 2001 (1) Usefulness of international dairy bull evaluations Rex L. Powell Animal Improvement Programs Laboratory Agricultural Research.

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Presentation on theme: "2001 Interbull, August 2001 (1) Usefulness of international dairy bull evaluations Rex L. Powell Animal Improvement Programs Laboratory Agricultural Research."— Presentation transcript:

1 2001 Interbull, August 2001 (1) Usefulness of international dairy bull evaluations Rex L. Powell Animal Improvement Programs Laboratory Agricultural Research Service, USDA, Beltsville, MD rpowell@aipl.arsusda.gov

2 Interbull Educational Tour 2001 (2) R. L. Powell 2001 R. L. Powell 2001 Interbull Formed  IDF and EAAP activities  1982 - Leningrad meeting  1983 - Interbull formed  1988 - Became ICAR committee  1991 - Centre established

3 Interbull Educational Tour 2001 (3) R. L. Powell 2001 R. L. Powell 2001 Interbull Centre  Site: Uppsala, Sweden  Responsibilities and activities:  Steering committee sets policy  General operations by staff  Global service provider

4 Interbull Educational Tour 2001 (4) R. L. Powell 2001 R. L. Powell 2001 Interbull Evaluation Process  National evaluations sent to Centre  MACE combines pedigree and national evaluation data  Estimated genetic correlations applied  Evaluations returned to countries on their own scale  Officiality responsibility of countries

5 Interbull Educational Tour 2001 (5) R. L. Powell 2001 R. L. Powell 2001 Countries Participating in Service 0 5 10 15 20 25 No. countries Aug-94Aug-95 Aug-96Aug-97 Aug-98 Feb-99 Aug-99 Evaluation date SendingReceiving

6 Interbull Educational Tour 2001 (6) R. L. Powell 2001 R. L. Powell 2001 Numbers of Countries per Bull 94.6 3.8 0.80.3 0.1 0 20 40 60 80 100 Percentage of Bulls 123456789+ Number of countries

7 Interbull Educational Tour 2001 (7) R. L. Powell 2001 R. L. Powell 2001 Question Do foreign data aid in prediction of future national evaluations?

8 Interbull Educational Tour 2001 (8) R. L. Powell 2001 R. L. Powell 2001 Study Design NATIONAL 1995 NATIONAL 1999 Data Best Predictor?

9 Interbull Educational Tour 2001 (9) R. L. Powell 2001 R. L. Powell 2001 Study Design NATIONAL NATIONAL 19951999 r SD r

10 Interbull Educational Tour 2001 (10) R. L. Powell 2001 R. L. Powell 2001 Data  February 1995 Interbull evaluations  National 1995 evaluations  National 1999 evaluations  Canada, Germany, Italy, Netherlands, USA

11 Interbull Educational Tour 2001 (11) R. L. Powell 2001 R. L. Powell 2001 Answers  Foreign data improved prediction  Improvement greatest for imported bulls  Interbull evaluations should be official

12 Interbull Educational Tour 2001 (12) R. L. Powell 2001 R. L. Powell 2001 Top 100 Bulls for Yield (USA) Based on Official Evaluations LocationProteinFatMilk USA473567 NLD23297 FRA876 ITA111 DEU3115 CAN245 DNK322 Others13117 Top-100 Bulls with US Sires 654989 Source: Interbull and domestic, February 2001

13 Interbull Educational Tour 2001 (13) R. L. Powell 2001 R. L. Powell 2001 Top 100 Bulls for Yield (NLD) Based on Official Evaluations LocationProteinFatMilk USA241348 NLD475919 FRA14511 ITA121 DEU167 CAN032 DNK343 Others1089 Top-100 Bulls with US Sires 423374 Source: Interbull and domestic, February 2001

14 Interbull Educational Tour 2001 (14) R. L. Powell 2001 R. L. Powell 2001 Top 100 Bulls for Yield (CAN) Based on Official Evaluations LocationProteinFatMilk USA401652 NLD26348 FRA10117 ITA211 DEU4108 CAN5811 DNK233 Others111710 Top-100 Bulls with US Sires 542783 Source: Interbull and domestic, February 2001

15 Interbull Educational Tour 2001 (15) R. L. Powell 2001 R. L. Powell 2001 Top 100 Bulls for Yield (HUN) Based on Official Evaluations LocationProteinFatMilk USA311242 NLD20328 FRA181213 ITA422 DEU71813 CAN347 DNK444 Others131611 Top-100 Bulls with US Sires 633082 Source: Interbull, February 2001

16 Interbull Educational Tour 2001 (16) R. L. Powell 2001 R. L. Powell 2001 Top 100 Bulls for Yield (CSK) Based on Official Evaluations LocationProteinFatMilk USA221534 NLD302913 FRA16108 ITA316 DEU31710 CAN7510 DNK453 Others151816 Top-100 Bulls with US Sires 413876 Source: Interbull, February 2001

17 Interbull Educational Tour 2001 (17) R. L. Powell 2001 R. L. Powell 2001 Use of Reliability  Measure of accuracy how much not  Guides how much to use a bull, not whether to use a bull  Minimum restricts the number of bulls  Limiting bulls limits progress

18 Interbull Educational Tour 2001 (18) R. L. Powell 2001 R. L. Powell 2001 Impact of Minimum REL On Number of Bulls & Mean PTAP of Top 50 (USA) Minimum REL Number of Bulls PTAP (top 50) (all) 06547272 606138072 705431271 754970771 803012169 851416766 90434859 Source: Interbull, May 2001

19 Interbull Educational Tour 2001 (19) R. L. Powell 2001 R. L. Powell 2001 Impact of Minimum REL On Number of Bulls & Mean PTAP of Top 50 (HUN) Minimum REL Number of Bulls PTAP (top 50) (all) 06547260 6070860 704498259 752607857 80607052 85120347 9020832 Source: Interbull, May 2001

20 Interbull Educational Tour 2001 (20) R. L. Powell 2001 R. L. Powell 2001 Impact of Minimum REL On Number of Bulls & Mean PTAP of Top 50 (CSK) Minimum REL Number of Bulls PTAP (top 50) (all) 06547266 605924266 703520365 75739559 80168154 8583750 9045747 Source: Interbull, May 2001

21 Interbull Educational Tour 2001 (21) R. L. Powell 2001 R. L. Powell 2001 Websites  interbull.org interbull.org  Publications & bulletins  Evaluation summaries  aipl.arsusda.gov aipl.arsusda.gov  Documents  Downloadable files  Access to all evaluations

22 Interbull Educational Tour 2001 (22) R. L. Powell 2001 R. L. Powell 2001 Conclusions  Interbull Centre young and growing  Rankings differ by country  Foreign data improve prediction of later national evaluations  Most gain is from considering all bulls on one scale  Challenges remain in technical areas and in education

23 Interbull Educational Tour 2001 (23) R. L. Powell 2001 R. L. Powell 2001 Foreign Bull Options  Top 100 on HGI  HGI as high as 10th HUN bull and  HUN REL 75% for production  HUN REL 70% for conformation  Nominated and approved

24 Interbull Educational Tour 2001 (24) R. L. Powell 2001 R. L. Powell 2001 Foreign Bulls In & Out  367 bulls on HGI combined list  Includes 68 of top 200 on US Net Merit  Bulls from all countries eligible for US NM$ list  6 of top 12 for NM$ not included on HGI list (among them #2)  3 of top 8 on TPI not included  #1 not included

25 Interbull Educational Tour 2001 (25) R. L. Powell 2001 R. L. Powell 2001 Foreign Bulls Excluded Hungarian 1 Foreign NameCtry.ProteinRELREL 2 Daus Elite Mt Donor Imp AUS666890128 Etazon Lambro EST517496284 Looster FRA507091108 Pen-Col Decision USA517391109 Pckstn. E. Curtis USA457390116 Kemview Beauty USA40718796 Sildahl BW D. Boy USA57708796 1 Protein and REL from Hungarian scaled MACE 2 Reliability of evaluation in home country of bull

26 Interbull Educational Tour 2001 (26) R. L. Powell 2001 R. L. Powell 2001 Reliabilities on Hungarian Scale US REL Hungarian REL ExpectedActual 755862 806266 856669 907073 927174 947375 967477 987678 997779

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