Pantnagar Journal of Research

Abstract

Data for the present investigation were collected from the history sheet of crossbred cattle maintained at the Instructional Dairy Farm of G. B. Pant University of Agriculture and Technology, Pantnagar. The data pertained to 1029 crossbred cattle from 107 sires were distributed over a period of 49 years from 1966 to 2014. The average breeding values of 91 sires by the Animal Model and 107 sires by the Sire Model were evaluated for all the traits. The average breeding values for AFC, FLMY, FLP, FDP, FCI, LTMY, and LTLL were estimated as 1199.02 days, 2799.08 kg, 332.08 days, 129.30 days, 459.04 days, 10002.88 kg, and 1087.66 days, respectively, by Animal Model. The average breeding values for AFC, FLMY, FLP, FDP, FCI, LTMY, and LTLL were estimated as 1199.85 days, 2799.56 kg, 332.10 days, 129.12 days, 458.57 days, 10005.00 kg, and 1091.55 days, respectively, by Sire Model. Sires were ranked according to their breeding values for both the models, which indicated that all sires would not rank the same for first lactation and lifetime traits. The top-ranking sires between the SM and AM were inconsistent for some traits. There were changes in the rank of first top 10 sires of sire evaluation by the Animal and Sire Model. Comparison between the Animal and Sire Model was done by estimating Information criteria of Akaike (AIC) and Bayesian (BIC) information criteria and found that Animal Model was having highest negative value for (AIC) and (BIC), indicating its superiority over than Sire Model for estimating genetic parameters. which suggested that the Animal Model would be the most adequate model.