Search. Read. Cite.

Easy to search. Easy to read. Easy to cite with credible sources.

Pakistan Journal of Biological Sciences

Year: 2004  |  Volume: 7  |  Issue: 7  |  Page No.: 1221 - 1224

Estimates of Genetic and Phenotypic Parameters for Birth Weight in Holstein Friesian Cattle

Galip Bakir, Ali Kaygisiz and Hasan Ulker


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.

Cited References Fulltext