Prediction of lactation milk yield from test day records using Wood model

The model parameters, fit statistics and prediction of lactation yield from test day records of different breed groups of Holstein-Friesian breed were estimated after fitting the Wood Model. The model parameters and fit statistics of different breed groups were varied. There was a significant difference among breed groups of Holstein-Friesian cows. According to R2, CV and RootMSE values, the Holstein-Friesian (75%) x Local (25%) blood group showed good fit of Wood model than other breed groups. The predicted highest lactation milk yield (1813.62Kg) was observed for the cow which carries 75% of Holstein-Friesian blood.