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Can you believe those genomic evaluations for young bulls? - PowerPoint PPT Presentation


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Can you believe those genomic evaluations for young bulls?. Proven Bulls or Young Bulls?. Genotyped Animals (n=6,005) In North America as of April 2008. Genotyped Animals (n=19,464) In North America as of December 2008. Genotyped Animals (n=25,393) In North America as of April 2009.

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adoption of genomic testing us young bulls with naab codes apr 2009
Adoption of Genomic TestingUS young bulls with NAAB codes, Apr 2009

* 2007-2008 counts are incomplete

young vs old bull test
Young vs. Old Bull Test
  • Genomic PTAs computed from Nov 2004 data
    • Select top 20 young and old bulls for genomic or traditional NM$
  • Predict Jan 2009 daughter merit
    • Remove direct contribution of PA (similar to DYD)
    • Compare regressions and bias (adjusting for 2005 base change)
genomic vs traditional
Genomic vs. Traditional
  • Examine traditional and genomic trends for two traits:
    • Net Merit
    • Protein
  • Data from February 2009
conclusions
Conclusions
  • Almost all new bulls and majority of in-waiting bulls are genotyped
  • Genomic PTAs have
    • Less bias than parent averages
    • Regressions closer to 1.0
    • Higher correlations with later data
  • Higher Net Merit for top 20 young bulls than proven bulls from 2004
acknowledgments
Acknowledgments
  • Genotyping and DNA extraction:
    • USDA Bovine Functional Genomics Lab, U. Missouri, U. Alberta, GeneSeek, Genetics & IVF Institute, Genetic Visions, and Illumina
  • Computing:
    • AIPL staff (Leigh Walton, Jay Megonigal)
  • Funding:
    • National Research Initiative grants
      • 2006-35205-16888, 2006-35205-16701
    • Agriculture Research Service
    • Holstein, Jersey and Brown Swiss breed associations
    • Contributors to Cooperative Dairy DNA Repository (CDDR)
cddr contributors
CDDR Contributors
  • National Association of Animal Breeders (NAAB, Columbia, MO)
    • ABS Global (DeForest, WI)
    • Accelerated Genetics (Baraboo, WI)
    • Alta (Balzac, AB, Canada)
    • Genex (Shawano, WI)
    • New Generation Genetics (Fort Atkinson, WI)
    • Select Sires (Plain City, OH)
    • Semex Alliance (Guelph, ON, Canada)
    • Taurus-Service (Mehoopany, PA)