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 transcript:

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

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

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

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

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

Interbull Educational Tour 2001 (6) R. L. Powell 2001 R. L. Powell 2001 Numbers of Countries per Bull Percentage of Bulls Number of countries

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

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

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

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

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

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

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

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

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

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

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

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) Source: Interbull, May 2001

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) Source: Interbull, May 2001

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) Source: Interbull, May 2001

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

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

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

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

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 AUS Etazon Lambro EST Looster FRA Pen-Col Decision USA Pckstn. E. Curtis USA Kemview Beauty USA Sildahl BW D. Boy USA Protein and REL from Hungarian scaled MACE 2 Reliability of evaluation in home country of bull

Interbull Educational Tour 2001 (26) R. L. Powell 2001 R. L. Powell 2001 Reliabilities on Hungarian Scale US REL Hungarian REL ExpectedActual