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ESTIMATES OF GENETIC PARAMETERS OF SOME GROWTH TRAITS IN JERSEY CATTLE

  • Khan, R.N. (Animal Sciences Institute, National Agricultural Research Centre) ;
  • Akhtar, S. (Animal Sciences Institute, National Agricultural Research Centre)
  • Received : 1994.03.30
  • Accepted : 1995.04.25
  • Published : 1995.12.01

Abstract

Data from 178 Jersey calves born at Livestock Experiment Station were analyzed to obtain estimates of heritability, genetic and phenotypic correlations of some growth traits. Sex-specific variance and covariance components were estimated for birth weight (BWT), 180-d weight (WWT), 365-d weight (YWT), birth to weaning daily gain (BWG), weaning to yearling daily gain (WYG) and brith to yearling gain (BYG). Heritabilities, genetic and phenotypic correlations were generally higher in males than females. Heritabilities estimated for males and females respectively were 0.98 and 0.49 for BWT; 0.70 and 0.76 for WWT; 0.71 and 0.26 for YWT. Genetic correlations were higher than phenotypic correlations in all the treats studied.

Keywords

Genetic Correlation;Phenotypic Correlation;Growth;Jersey Cattle