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Genetic Evaluation of Calving Traits in Denmark, Finland, and Sweden

Dorothee Boelling Ulrik Sander Nielsen Jukka Pösö Jan-Åke Eriksson Gert Pedersen Aamand. Genetic Evaluation of Calving Traits in Denmark, Finland, and Sweden. Introduction. NAV: joined breeding value estimation across Denmark, Finland, and Sweden New group of traits: calving performance

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Genetic Evaluation of Calving Traits in Denmark, Finland, and Sweden

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  1. Dorothee Boelling Ulrik Sander Nielsen Jukka Pösö Jan-Åke Eriksson Gert Pedersen Aamand Genetic Evaluation of Calving Traitsin Denmark, Finland, and Sweden

  2. Introduction • NAV: joined breeding value estimation across Denmark, Finland, and Sweden • New group of traits: calving performance • Two groups: Holstein and Red Dairy Group • Procedures and results for Holstein will be presented here

  3. Calving Traits

  4. Survival

  5. Calving Ease

  6. Calving Ease: 2 Scales

  7. The Statistical Model

  8. Genetic Parameters: Heritabilities

  9. Breeding Values for Birth and Calving Traits • Birth Traits: direct breeding value = 2 x effect as sire of the calf + direct breed effects • Calving Traits (DK + Fi): maternal breeding value = 2 x effect as MGS + maternal breed effects – 0.5 x direct breeding value • Calving Traits (Sw): MGS Breeding Value = 2 x effect as MGS + maternal breed effects

  10. Results: Survival 1

  11. Results: Calving Ease 1

  12. Results: Birth Index

  13. Results: Calving Index

  14. Changes to National Systems (1)

  15. Changes to National Systems (2)

  16. Outlook • Interbull testrun in March 2007 • Still national breeding value estimation • Model for Holstein ready for implementation • Work still under progress for Red Dairy Cattle

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