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Genetic parameters of novel mid-infrared predicted milk traits in three dual-purpose cattle breeds

This study examines the genetic parameters and potential of novel mid-infrared predicted milk traits in three dual-purpose cattle breeds. The research explores the usefulness of mid-infrared spectra in predicting longevity and the impact of genomics on reliability.

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Genetic parameters of novel mid-infrared predicted milk traits in three dual-purpose cattle breeds

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  1. Genetic parameters of novel mid-infrared predicted milk traits in three dual-purpose cattle breeds S. Vanderick1,2, F.G. Colinet1, A. Mineur1, R.R Mota1, N. Gengler1, H. Hammami1 1Gembloux Agro-Bio Tech, ULiège, B-5030 Gembloux, Belgium 2 sylvie.vanderick@uliege.be EAAP 2018 Meeting Dubrovnik

  2. Dual-purposecattle Dual-purpose Belgian Blue (dpBB) Montbéliarde (MON) Normande (NOR) EAAP 2018 Meeting Dubrovnik

  3. Dual-purposecattle • Difficulty in gathering relevant large-scale data in routine • Small sized cattle populations • (Organic) pasture based production systems EAAP 2018 Meeting Dubrovnik

  4. Usefulness of mid-infrared spectra (MIR) FOSS Milk samples (milk payment, milk recording) MIR analysis Calibration equations • Quantification • wide range of novel phenotypes ! Raw data = MIR spectra EAAP 2018 Meeting Dubrovnik

  5. Objectives • Genetic parameters of 39 novel MIR predicted milk traits • How MIR traits can predict longevity at early stages? • Any help from genomics? EAAP 2018 Meeting Dubrovnik

  6. Data EAAP 2018 Meeting Dubrovnik

  7. MIR predicted milk traits • Cheese properties: 8 • Groups of fatty acids (FA): 14 • Minerals: 5 • Protein components: 8 • Ketone bodies: 3 • Methane (CH4) single-trait multi-lactation random regression test-day model EAAP 2018 Meeting Dubrovnik

  8. CH4 Conventional Production traits Cheese properties Ketone bodies Groups of FA Minerals Proteins EAAP 2018 Meeting Dubrovnik

  9. CH4 Conventional Production traits Cheese properties Ketone bodies Groups of FA Minerals Proteins EAAP 2018 Meeting Dubrovnik

  10. CH4 Conventional Production traits Cheese properties Ketone bodies Groups of FA Minerals Proteins EAAP 2018 Meeting Dubrovnik

  11. CH4 Conventional Production traits Cheese properties Ketone bodies Groups of FA Minerals Proteins EAAP 2018 Meeting Dubrovnik

  12. CH4 Conventional Production traits Cheese properties Ketone bodies Groups of FA Minerals Proteins EAAP 2018 Meeting Dubrovnik

  13. Prediction of longevity at early stages ? production & novel MIR traits EAAP 2018 Meeting Dubrovnik

  14. 21,287 test-day records Prediction of longevity at early stages ? 2,988 primiparousdpBB cows EBV & GEBV for production & novel MIR traits 7,744 animals in pedigree 314 genotyped animals (108 ♀ and 206 ♂ ) EAAP 2018 Meeting Dubrovnik

  15. 21,287 test-day records Prediction of longevity at early stages ? 2,988 primiparousdpBB cows Different scenarios without and with genomics EBV & GEBV for production & novel MIR traits 7,744 animals in pedigree Partial least squares analyses (high correlated traits) 314 genotyped animals (108 ♀ and 206 ♂ ) EAAP 2018 Meeting Dubrovnik

  16. Longevity from MIR traits? Based on genotyped dpBB bulls with ≥ 10 daughters (N=160) EAAP 2018 Meeting Dubrovnik

  17. Longevity from MIR traits? Based on genotyped dpBB bulls with ≥ 10 daughters (N=160) EAAP 2018 Meeting Dubrovnik

  18. Longevity from MIR traits? Based on genotyped dpBB bulls with ≥ 10 daughters (N=160) EAAP 2018 Meeting Dubrovnik

  19. Longevity from MIR traits? Based on genotyped dpBB bulls with ≥ 10 daughters (N=160) EAAP 2018 Meeting Dubrovnik

  20. Take home messages • Novel MIR predicted milk traits for dual-purpose cattle: • heritable  selection • promising early indicators of longevity (for dpBB) • Use of genomics: • Slight increase of reliabilities (not shown) • GEBV for novel MIR traitstend to be better predictors of longevity MIR traits ~ useful in 3 dual-purpose cattle breeds EAAP 2018 Meeting Dubrovnik

  21. Acknowledgements EAAP 2018 Meeting Dubrovnik

  22. Genetic parameters of novel mid-infrared predicted milk traits in three dual-purpose cattle breeds S. Vanderick1,2, F.G. Colinet1, A. Mineur1, R.R Mota1, N. Gengler1, H. Hammami1 1Gembloux Agro-Bio Tech, ULiège, B-5030 Gembloux, Belgium 2 sylvie.vanderick@uliege.be EAAP 2018 Meeting Dubrovnik

  23. CH4 Conventional Production traits Cheese properties Ketone bodies Groups of FA Minerals Proteins EAAP 2018 Meeting Dubrovnik

  24. R² of calibration equation EAAP 2018 Meeting Dubrovnik

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