Notes
Slide Show
Outline
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AIPL Contributions to S-1008
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Stillbirth Genetic Correlations
Service sire SB above diagonal, daughter SB below
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Calving Ease Genetic Correlations
Service sire CE above diagonal, daughter CE below
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Brown Swiss Calving Ease
Service sire correlations above diagonal, daughter below
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Milk (kg)
Genetic trend on all-breed base
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Fat (kg)
Genetic trend on all-breed base
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Protein (kg)
Genetic trend on all-breed base
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Somatic Cell Score
Genetic trend on all-breed base
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Productive Life
Genetic trend on all-breed base
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Daughter Pregnancy Rate
Genetic trend on all-breed base
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Economic Measures, Cow Size
1987 ADSA meeting
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Possible Economic Measures
  • Lifetime Profit or ANRI-OC
  • Discounted net present value
  • Annualized profit / annualized cost
  • Return on investment
  • Others?
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Alleles Shared by Sibs
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Reliability from Sibs
Assuming 60 loci affect trait
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REL from Sibs of Parents
Assuming 60 independent loci affect trait
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REL from Unrelated Animals
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Genomic EBVs for Real Bulls
  • USDA-BFGL study with industry funding using 60,000 SNPs
  • Genotype ~2000 proven bulls
  • Predict ~400 bulls sampled later
  • Reliability = 71% vs 36% from PA
  • Higher if LD & major loci assumed
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Conclusions
  • Corr (USA, foreign stillbirth) ~ .70
  • All-breed genetic trends seem reasonable
  • Several economic goals are possible
  • Dense maps will change selection