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Year: 2004 | Volume: 7 | Issue: 7 | Page No.: 1221 - 1224
Galip Bakir, Ali Kaygisiz and Hasan Ulker
Abstract
The purpose of this study was to estimate genetic and phenotypic parameters for birth weight in Holstein calves raised at 4 different state farms. The least squares mean of birth weight was 38.09±0.07 kg. Effects of birth year, birth type, parity, farm (P<0.01) and season (P<0.05) on birth weight was significant; however, the effect of sex on birth weight was not significant. Repeatability and heritability estimates for birth weight were 0.34±0.02 (P<0.05) and 0.13±0.02 (P<0.01). Based on these results it can be suggested that the effects of environmental factors should be eliminated in the selection which will be mediated based on birth weight.