Genetic control of milk yield from lactations of different duration in Nili-Ravi buffaloes

Abstract

Data on 2704 lactations of 1093 Nili-Ravi buffaloes were used to see the genetic control of milk yield projected for lactation length using information on last recorded yield and average daily yield of the recorded lactation. Year and season of calving and their interaction significantly affected actual and predicted milk yield. Winter calvers had a higher mean (1364.5±31.63 kg) as compared to summer calvers (1299.4±30.28 kg). The milk yield adjusted to 308-days increased from first parity (1731.8±78.86 kg) to third parity (1919.6±64.56 kg) where after it declined gradually. Age at calving with in parity affected lactation milk yield significantly (P