Random regression models using different functions to model milk flow in dairy cows
“Random regression models using different functions to model milk flow in dairy cows”, vol. 13, pp. 7528-7541, 2014.
, We analyzed 75,555 test-day milk flow records from 2175 primiparous Holstein cows that calved between 1997 and 2005. Milk flow was obtained by dividing the mean milk yield (kg) of the 3 daily milking by the total milking time (min) and was expressed as kg/min. Milk flow was grouped into 43 weekly classes. The analyses were performed using a single-trait Random Regression Models that included direct additive genetic, permanent environmental, and residual random effects.