GENETIC ANALYSIS OF PRODUCTION AND REPRODUCTION TRAITS OF HOLSTEIN FRIESIAN CATTLE ON AN ORGANIZED FARM
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Date
2008
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Anand Agricultural University, Anand
Abstract
The body weight, production and reproduction records of Holstein
Friesian cattle were collected from H.F. farm, Anand Agricultural University,
Anand from 1992 – 2007. Total 278 body weight records at birth weight, body
weight at 3, 6 and 12 months under 32 sires and daily milk production records for
209 lactations from 130 cattle were collected. Data up to fifth lactations were
collected for each animal. The records were analyzed using least squares analysis
procedures incorporating Period, Seasons of calving, parity etc. non-genetic
factors in statistical model. The Mixed Model Least-Squares and Maximum
Likelihood Computer Programme PC 2 Version of Harvey (1990) was used to
estimate genetic parameters from adjusted data by paternal half sib correlation
method. Gamma function of Statistical Packages for Social Sciences programme