Article
Random regression models using different functions to model milk flow in dairy cows.
Genetics and molecular research : GMR - 12 Sept 2014
Laureano M M M, Bignardi A B, El Faro L, Cardoso V L, Tonhati H, Albuquerque L G
Abstract excerpt
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...
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