Notes
Slide Show
Outline
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Animal Improvement Programs Laboratory (AIPL)
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Mission
  • Conduct research to discover, test, and implement improved genetic evaluation techniques for economically important traits of dairy cattle and goats
  • Genetically improve efficiency of dairy animals for yield and fitness
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Production traits evaluated
  • Yield
    • Milk
    • Fat
    • Protein
  • Component percentage
    • Fat
    • Protein
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Fitness traits evaluated
  • Type (conformation)
  • Productive life (longevity)
  • Somatic cell score (mastitis resistance)
  • Fertility
    • Daughter pregnancy rate (cow)
    • Estimated relative conception rate (bull)
  • Calving ease and stillbirth (service sire and daughter)
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U.S. dairy population & yield
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National Dairy Genetic Evaluation Program
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Current research
  • Improved evaluations for male and female fertility
  • Improved evaluations of calving traits by accounting for genetic differences by parity
  • DNA information used in evaluations
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Genomic evaluations
  • Joint project with Bovine Functional Genomics Laboratory
    • Over 38,000 SNP informative for Holsteins
    • Over 6000 bull and cows genotyped so far
  • SNP effects estimated from animals with evaluations
  • Evaluations of young animals
  • Increased accuracy over parent information
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Current status
  • Field test results distributed for 750 nominated animals
  • Extension to Jersey and Brown Swiss in progress
  • Transition to commercial genotyping labs
  • Extension to cows planned for June
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Possible impact
  • Genomic evaluations received on bull calves before purchase
  • Genotyping required for bull dams
  • Decreased number of bulls in waiting
  • Marketing based on genomic evaluations
  • Increased rate of genetic improvement
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Summary
  • Genetic evaluations developed by AIPL are basis of impressive rate of genetic improvement
  • Frequent innovations improve accuracy and add traits of economic importance
  • Genomic information expected to lead to large changes in animal breeding industry