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Genetic solution to the problem of boar taint for production of entire males

Genetic solution to the problem of boar taint for production of entire males P.K. Mathur a ,*, H.A. Mulder b , J. Ten Napel b , J. J. Windig b , R.E. Crump b , B. van der Fels b , L. Heres c , S. Bloemhof a , M. S. Lopes a , E. F. Knol a a IPG, Institute for Pig Genetics B.V., The Netherlands

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Genetic solution to the problem of boar taint for production of entire males

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  1. Genetic solution to the problem of boar taint for production of entire males P.K. Mathura,*, H.A. Mulderb , J. Ten Napelb, J. J. Windigb, R.E. Crumpb, B. van der Felsb , L. Heresc, S. Bloemhofa,M. S. Lopesa, E. F. Knola a IPG, Institute for Pig Genetics B.V., The Netherlands b Animal Breeding and Genomics Centre, Wageningen UR c VION Food Group, The Netherlands

  2. Detection methods Human Nose Scores (HNS) Androstenone and skatole Genetic parameters Production Reproduction Genomic analysis Breeding strategy Genetic solution to the problem of boar taint

  3. Boar taint Consumers recognise boar taint by SMELL When pork is heated

  4. So do the slaughter plants .. Schnippe, Schweinzuch und Schweinemast, SUS, 4:2011

  5. We did so in the “lab” Human Nose Scores (HNS) 4 3 2 1 0 21,972 samples Source: Mathur et al. (2011) submitted to Meat Science journal

  6. But the science believes in boar taint compounds Accumulatedin fat • Skatole (3-methyle-indole) • Produced in hind gut • Related “Fecal” odour • Androstenone (pheromone) • Produced in testes • Related “urine” odour

  7. Genetic parameters More than 7,000 boars Heritabilities (diagonal), Genetic correlation (below diagonal), Phenotypic correlations (above diagonal). Significant estimates in bold Source: Windig et al. (2011) submitted to Journal of Animal Science

  8. Production traits Genetic correlations N= 7,336 : Androstenone and Skatole N= 20,130 : Human Nose Scores Source: Windig et al. (2011) submitted to Journal of Animal Science

  9. Reproduction traits Genetic correlations Significant estimates in bold

  10. Genomic information Reduction in boar taint due to a single SNP with large effect Source: Duijvesteijn et al. BMC Genetics (2010)

  11. We used a panel of SNPs Each AI boar genotyped with a panel of boar taint related SNPs selected out of 60K SNPs

  12. Genomic selection Phenotypic data HNS, And, Ska Genotypes based on selected SNP panel Genomic Breeding Values (GBVs)

  13. Breeding goal Reduce “True” Boar taint • Assumed to follow normal distribution • Values on underlying scale based on area under the curve

  14. Sorting of LBT boars a) ASI compounds (carcass and biopsy) b) TOPIGS LBT-boar Human nose scores c) LBT = Low Boar Taint Genomics

  15. Effect of genetic selection Human Nose Scores Effect of LBT boars (%) 4 3 2 1 0

  16. Conclusion through a combination of: A) Boar taint compounds (And, Ska) B) Human nose scores C) Genomic information Boar taint can be reduced through genetics

  17. Thanks !

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