NGWI Joint Meeting with USDA Carver Center Beltsville, MD April 27, 2009
2003 Rex L. Powell Animal Improvement Programs Laboratory Agricultural Research Service, USDA,...
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200 3 Rex L. Powell Rex L. Powell Animal Improvement Programs Laboratory Agricultural Research Service, USDA, Beltsville, MD [email protected] Interbull as a Tool Interbull as a Tool for Genetic for Genetic Improvement Improvement
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Transcript of 2003 Rex L. Powell Animal Improvement Programs Laboratory Agricultural Research Service, USDA,...
2003
Rex L. PowellRex L. PowellAnimal Improvement Programs LaboratoryAgricultural Research Service, USDA, Beltsville, [email protected]
Interbull as a Tool for Interbull as a Tool for Genetic ImprovementGenetic Improvement
BSCBA Annual Meeting (2) R.L. Powell200
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INTERBULLINTERBULL
International Bull Evaluation Service
Centre in Uppsala, Sweden
Responsibilities and activities Steering committee sets policy General operations by staff Global service provider
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Interbull Evaluation ProcessInterbull 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
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Interbull Service Participants Interbull Service Participants Brown SwissBrown Swiss
Country
Trait Participation
Percentage of bullsYield Type SCS
Germany/Austria 51Switzerland 24Italy 12USA 8Slovenia 3Canada 1France 1The Netherlands <1New Zealand <1
BSCBA Annual Meeting (5) R.L. Powell200
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Numbers of Countries per BullNumbers of Countries per Bull
0
10
20
30
40
50
60
70
80
90
100P
erce
nta
tge
of
Bu
lls
1 2 3 4 5 6 7 8
Number of Countries
5401
237 80 32 13 15 3 5
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Genetic Correlations with USAGenetic Correlations with USA
Country Protein StatureFrance .95 .97Canada .94 .94Italy .91 .96The Netherlands .90 .98Germany/Austria .89Switzerland .89 .88Slovenia .87New Zealand .77
BSCBA Annual Meeting (7) R.L. Powell200
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Example Bull “Kiwi”Example Bull “Kiwi”
Country
Daughters
Genetic CorrelationNumber Percentage
New Zealand 144 75% 0.77
USA 49 25% 1.00Interbull Breeding Value in the US
=26% New Zealand daughters57% USA daughters17% Pedigree
Source: Dr. Kent Weigel, University of Wisconsin
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Example Bull “Bratwurst”Example Bull “Bratwurst”
Interbull Breeding Value in the US
=45% German daughters40% USA daughters15% Pedigree
Source: Dr. Kent Weigel, University of Wisconsin
Country
Daughters
Genetic CorrelationNumber Percentage
Germany 94 72% 0.89
USA 37 28% 1.00
BSCBA Annual Meeting (9) R.L. Powell200
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Example Bull “Meatball”Example Bull “Meatball”
Country
Daughters
Genetic CorrelationNumber Percentage
Italy 78 37% 0.91
New Zealand 79 38% 0.77
USA 51 25% 1.00Interbull Breeding Value in the US
=
34% Italian daughters12% New Zealand daughters42% USA daughters12% Pedigree
Source: Dr. Kent Weigel, University of Wisconsin
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Top 50 Bulls for Yield (USA)Top 50 Bulls for Yield (USA)Based on Interbull EvaluationsBased on Interbull Evaluations
Country Milk Protein Fat
Germany/Austria 8 19 21USA 19 16 17Italy 14 11 7Switzerland 9 3 5France 0 1 0Canada 0 0 0The Netherlands 0 0 0New Zealand 0 0 0Slovenia 0 0 0
Top-50 Bulls with US Sires
44 28 37
Source: Interbull, May 2003
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Study ObjectiveStudy Objective
Do foreign data (Interbull
evaluations) aid in
prediction of future
national evaluations?
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Sources of Added DataSources of Added Data
NATIONALNATIONAL
NowEarlier
NATIONALNATIONAL
Data Best Predictor?
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AssumptionsAssumptions
Current national evaluation is what we want to predict
Part-whole correlations between national evaluations and between national and Interbull evaluations
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Data SourcesData Sources
Interbull PTA that included foreign daughters from February 1999
Concurrent US-only (national) PTA
May 2003 national PTA REL 90% Addition of 50 daughters between
national evaluations
All expressed on US scale, and current US base
BSCBA Annual Meeting (18) R.L. Powell200
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Data IncludedData Included
Number of bulls: 24
% US daughters in Interbull evaluationAverage: 28%Median: 22%Range: 1 – 97%
Average RELFeb 1999 Interbull: 94%Feb 1999 national: 89%May 2003 national: 97%
BSCBA Annual Meeting (19) R.L. Powell200
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Correlations with February 2003 Correlations with February 2003 National PTANational PTA
February 1999 PTA
Trait Interbull National
Milk .97 .86
Fat .91 .74
Protein .94 .74
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Differences From February 2003 Differences From February 2003 National PTANational PTA
February 1999 PTA
Interbull National
Average Absolute DifferencesMilk (lb) 102.8 139.5Fat (lb) 6.3 7.7Protein (lb) 3.5 4.9
February 1999 PTA
Interbull National
Average Absolute DifferencesMilk (lb) 102.8 139.5Fat (lb) 6.3 7.7Protein (lb) 3.5 4.9
SD of DifferencesMilk (lb) 114.9 232.6Fat (lb) 7.8 12.5Protein (lb) 2.7 7.9
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How to Use Interbull EvaluationsHow to Use Interbull Evaluations
All data on the same scale
Use reliability properly (how much to use a bull, not whether to use a bull)
Use appropriate indexes when possible
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ConclusionsConclusions
Interbull provides a useful tool
Increases the bull pool
Improves accuracy
Beware of truncation selection
Array of evaluated traits is expanding
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WebsitesWebsites
www.interbull.org Publications & bulletins Evaluation summaries
www.aipl.arsusda.gov Documents (including presentations) Downloadable files – top bull lists Public access to all evaluations on
the US scale, national and Interbull
