Prediction of Lifetime Milk Production from Early Lactation Traits in Crossbred Cattle

The first and second lactation traits of 158 crossbred cattle has been analyzed for prediction of life time milk production (LTP3) of crossbred cattle. On the basis of individually first and second lactation traits the lactation milk yield (LMY) and lactation length (LL) are important traits for prediction of lifetime milk production. When we consider all the first and second lactation traits including age at first calving the R² and R_A² were found 0.872 and 0.862 respectively, and finally traits LMY1, LMY2, LL1, LL2,SP 1, SP2, DP 1 and DP 2 were selected in the model by using backward elimination method of regression analysis.