Formerly International Journal of Basic and Applied Agricultural Research

Estimation of breeding value of sires using first lactation traits by BLUP method in crossbred cattle

VINEETA ARYA, B. N. SHAHI, D. KUMAR and R. S. BARWAL
Pantnagar Journal of Research, Volume - 20, Issue - 3 ( September-December 2022)

Published: 2022-12-31

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Abstract


The present investigation was carried on crossbred cattle maintained at Instructional Dairy Farm, Nagla of G.B. Pant University of Agriculture and Technology, Pantnagar. The study was conducted on 700 crossbred cattle, progeny of 68 sires which were born over a period of 28 years from 1990-2017. The sires were evaluated for first lactation traits namely Age at First Calving (AFC), First Lactation Milk Yield (FLMY), First Lactation Period (FLP), First Dry Period (FDP), First Calving Interval (FCI), First Service Period (FSP) and First Lactation 305 Day Milk Yield (FL305DMY) on the basis of analysed breeding value using univariate animal model i.e., BLUP (Best Linear Unbiased Prediction). Of late, the sires having different level of exotic inheritance were ranked on the basis of estimated breeding value. The average value of AFC, FLMY, FLP, FDP, FCI, FSP and FL305DMY observed in the present study were 1180.53 days, 2861.30 kg, 326.14 days, 124.15 days, 450.56 days, 261.33 days and 2615.9 kg, respectively. The minimum and maximum breeding values estimated for the respective traits were 1111.48 to 1245.82 days for AFC, 2530.32 to 3282.84 kg for FLMY, 301.86 to 345.44 kg for FLP, 104.49 to 145.62 days for FDP, 421.91 to 476.10 days for FCI, 248.79 to 268.88 days for FSP and 2392.69 to 2939.84 kg for FL305DMY. Taken into consideration the estimated average breeding value of different sires, the crossbred bulls were ranked for different first lactation traits and top ten sires according to traits of interest were recommended for selection and utilization in improvement programmes.


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