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INTERSTALLION

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INTERSTALLION. Steven Janssens (secretary) Jan Philipsson (chairmen). INTERSTALLION. Working group of the EAAP established in 1998  Improve accessibility, understanding and comparability of foreign breeding information across countries. Is this a problem….?.

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INTERSTALLION

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  1. INTERSTALLION Steven Janssens (secretary) Jan Philipsson (chairmen)

  2. INTERSTALLION • Working group of the EAAP established in 1998 Improve accessibility, understanding and comparability of foreign breeding information across countries. • Is this a problem….?

  3. Sport horse breeding = international • >60 studbooks/ org.WBFSH 61 members from 29 countries • >130,000 foals/year • concentrated in Europe (7 countries 50% foals) Germany 30,000 Belgium 4,000 Ireland 4,000 France 15,000 Sweden 3,500 The Netherlands 12,000 Denmark 2,500

  4. % matings by foreign stallions country perc. origin Netherlands 31% Germany, France France 6% Germany Denmark 74% Germany, The Netherlands Sweden 62% Germany, The Netherlands

  5. How to use foreign information? • How should we compare test results? • How should we compare breeding values?

  6. Same stallion: different values? G. Ramiro Z Netherlands 122 (97%) France +12 (88%) Belgium 98.5 (95%) Ireland 98 (10%)

  7. Correct interpretation requires information on: • How are breeding objectives defined? • How are horses tested? • How are breeding values calculated?

  8. INTERSTALLION initial research initiatives: • Survey breeding objectives • Survey on testing systems and breeding value estimation

  9. Survey breeding objectives…

  10. Performance testing

  11. Three types of performance tests competition test capacity field station accuracy

  12. Competition tests • many observations • large variation in traits (earnings, placings, scores, highest level) • problems with pre-selection • large environmental variation • low heritabilities (h2 = 0.10 - 0.20) • can only be measured late in life (5-12 years) MANY OBSERVATIONS BUT LOW VALUE

  13. Field performance tests • early age (3 - 4 years of age) • uniform conditions • reasonable costs • reasonable heritabilities (h2 = 0.20 - 0.30) • reasonable predictive value for later sport performance (rg > 0.50) REASONABLE GOOD INFORMATION AT REASONABLE COSTS

  14. Station performance tests • early age (3 - 4 years of age) • long testing period (up to 100 days) • very uniform conditions • high heritabilities (h2 = 0.20 - 0.60) • high predictive value for later sport performance (rg > 0.80) • high costs VERY GOOD INFORMATION AT HIGH COSTS

  15. How to improve transparency and comparability?

  16. Dairy cattle: Interbull 1. exchange information on national genetic evaluations 2. improvement and harmonisation of methods 3. international genetic evaluation using information from multiple countries

  17. INTERSTALLION further research initiatives: • Information exchange • harmonisation • Is across country evaluation possible?

  18. 1. Exchange information • http://www.interstallion.org • standardised information on: • breeding population • breeding objective • testing methods • genetic evaluation systems

  19. 2. Harmonise

  20. 3. Is across country evaluation possible? • Genetic connectedness • Genetic correlations start of pilot projects

  21. Pilot projects (I & II) • Investigate the genetic connectedness between countries/associations • Estimate genetic correlations between performances in different countries • 2 Phd studiesEmma Thorén Hellsten (SLU)Catherine Ruhlmann (INRA)extended committee (EAAP, ICAR, WBFSH) • Support by SLU, INRA , WBFSH

  22. Id numbers !! Ramiro, G. Ramiro Z Germany, Holstein ramiro 210389565 Belgium, sBs ramiro z X-188 Belgium, BWP ramiro z 1317Netherlands, KWPN g.ramiro z 294 France ramiro 59041861

  23. Pilot project I • Test results of horses • Station or field test • Young horses • DWBKWPNSWBHANHOL

  24. Results phase 1….

  25. Results gen. correlation • Only between DWB and SWB • Very high gen. Correlations between similar traits dressage, jumping

  26. Pilot project II • Competition data(jumping) • Breeding valuestallions • DWBKWPNSWBHANHOLISHBWP, sBsCSF

  27. Connectedness

  28. Genetic correlations

  29. The historic role of INTERSTALLION • IS research has pointed out variation in breeding programmes for sport horsesmade this info available + proposed some guidelines for improvement • IS research indicates that across country evaluation is technically possibleare (all) studbooks willing to continue

  30. .. role in the future... • Return to status of working group • Focuss on research on emerging traits (defects, longevity, temperament, ..) • Information dissemination (website)

  31. acknowledgements • Interstallion members • Swedish Agricultural University • KULeuven with support from Vlaams Fokkerij Centrum and Vlaams Varkens stamboek

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