Genetic Evaluation of Age at First Calving Data First calving from January 1, 1997 to present


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Genetic Evaluation of Age at First Calving


Data

  • First calving from January 1, 1997 to present

  • Calving ages between 540 and 1105 days

  • The cows sire had to be at least 5 years old

  • 8,193,513 first calvings



Model



Summary Statistics ― Cows currently milking



Summary Statistics ― Active Bulls



Correlations



Correlations (Continued)



Variance Component Estimates



Genetic Trend



Genetic Trend



Low Active HO Bulls



High Active HO Bulls



High and Low Active HO Bulls with > 90% rel



Low Active JE Bulls



High Active JE Bulls



High and Low Active JE Bulls with > 90% rel



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