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Can you believe those genomic evaluations for young bulls?

Explore the adoption of genomic testing for young bulls in North America from 2008 to 2009, comparing genomic and traditional breeding methods, reliability, and Net Merit changes. Discover how genotypic advancements impact bull selection and breeding outcomes. Acknowledgments to organizations and contributors.

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Can you believe those genomic evaluations for young bulls?

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  1. Can you believe those genomic evaluations for young bulls?

  2. Proven Bulls or Young Bulls?

  3. Genotyped Animals (n=6,005)In North America as of April 2008

  4. Genotyped Animals (n=19,464)In North America as of December 2008

  5. Genotyped Animals (n=25,393)In North America as of April 2009

  6. Adoption of Genomic TestingUS young bulls with NAAB codes, Apr 2009 * 2007-2008 counts are incomplete

  7. Genomic Tested BullsAvailable Apr 2009

  8. 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)

  9. Net Merit of Top 20 Bulls from 2009 data based on selection in 2004

  10. Changes in Net Merit means for top 20 bulls (2009 – 2004)

  11. Net Merit regressions Predict 2009 from 2004 data, expected = 1.00

  12. Average regressions across all traits Predict 2009 from 2004 data, expected = 1.00

  13. Genomic vs. Traditional • Examine traditional and genomic trends for two traits: • Net Merit • Protein • Data from February 2009

  14. Genomic vs. traditional – protein PTA

  15. Genomic vs. traditional – net merit

  16. Genomic vs. trad. – protein reliability

  17. Genomic vs. trad. – net merit reliability

  18. Reliability frequency

  19. 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

  20. 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)

  21. 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)

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