Genetic parameters of estimated net energy efficiencies for milk production, maintenance, and body weight change in dairy cows.

@article{Buttazzoni1989GeneticPO,
  title={Genetic parameters of estimated net energy efficiencies for milk production, maintenance, and body weight change in dairy cows.},
  author={Luca Buttazzoni and Ivan L. Mao},
  journal={Journal of dairy science},
  year={1989},
  volume={72 3},
  pages={
          671-7
        }
}
Net efficiencies of converting intake energy into energy for maintenance, milk production, and body weight change in a lactation were estimated for each of 79 Holstein cows by a two-stage multiple regression model. Cows were from 16 paternal half-sib families, which each had members in at least two of the six herds. Each cow was recorded for milk yield, net energy intake, and three efficiency traits. These were analyzed in a multitrait model containing the same 14 fixed subclasses of herd by… CONTINUE READING