(Animal Breeding and Genomics, WIAS, 1998-08) Baaijen, M.; Van der Lende, T.; Van Arendonk, J.A.M; Vargas Leitón, Bernardo
1. Allows the use of reproductive data from cows which have only partial information on a specific trait 2. The outcome variable corresponds to the measure of time elapsed from some starting point until an awaited event occurs 3. The results obtained from this analysis are given in the form of time specific probabilities 4. Time dependent covariates can also be added to the analysis.
OBJECTIVES 1. Assess the effect of heifer-weight category on age at first calving. 2. Assess the effect of heifer-weight and heifer-milk yield category on days open after first calving.
