Genetic evaluation of Holsteins in Colombia.

  title={Genetic evaluation of Holsteins in Colombia.},
  author={B Y Abubakar and R. E. MCDOWELL and Lloyd Dale Van Vleck},
  journal={Journal of dairy science},
  volume={69 4},
Original data consisted of 31,777 records of progeny of 1442 sires for calvings between 1975 and 1983. Unadjusted means for milk yield (kg), days in milk, days dry, calving interval, days carried calf, and age at calving were 4281, 267, 88, 421, 145, and 36.6. Estimated total variance for first lactation milk yield by Henderson's method 3 was 1,385,436 kg2 with sire and error variances accounting for 1.8 and 98.2%. Heritabilities for milk yield, lactation length, age at calving, and days… CONTINUE READING