GENETIC STUDIES ON LACTATION MILK YILD AND LACTATION LENGTH IN MURRAH BUFFALOES

摘要

The present investigation was undertaken on the data of Murrah buffaloes maintained at Cattle Breeding Farm, Banavasi, Kurnool District, Andhra Pradesh. Records of 466 Murrah buffaloes distributed over 15 years (1976 to 1990) were analysed by least squares technique to study the effect of period, season and parity. Least squares analysis of variance revealed that period, season and parity had significant influence on lactation milk yield and on lactation of Murrah buffaloes. The overall means for lactation milk yield and lactation length were 1704.36 ± 91.89 kg and 265.57 ± 13.88 days, respectively. Heritabilities and repeatabilities for lactation milk yield and lactation length were 0.22 ± 0.18 and 0.15 ± 0.001, 0.29 ± 0.03 and 0.25 ± 0.03 respectively.