Article
Genetic analysis of longitudinal trajectory of clinical mastitis in first-lactation Norwegian cattle.
Journal of dairy science - 1 Aug 2003
Heringstad B, Chang Y M, Gianola D, Klemetsdal G
Abstract excerpt
Clinical mastitis records for 36,178 first-lactation daughters of 245 Norwegian Cattle (NRF) sires were analyzed with a Bayesian longitudinal threshold model. For each cow, the period going from 30 d before calving to 300 d after calving was divided into 11 intervals of 30 d length each. Absence or presence of clinical mastitis within each interval was scored as "0" or "1", respectively. A Bayesian threshold...
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