UN SDG
Livestock Studies 1995, Vol 35, Num, 3-4     (Pages: 050-055)
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ESTIMATES OF GENETIC PARAMETERS OF REPRODUCTIVE TRAITS OF BROWN SWISS RAISED AT REGIONAL AGRICULTURAL SCHOOL IN VAN

Ali KAYGISIZ 1 ,Yusuf VANLI 1

1 Department of Animal Breeding and Genetics, Faculty of Agriculture, University of Kahramanmaraş Sütçü İmam. KAHRAMANMARAŞ -TÜRKİYE - The genetic parameters of reproductive traits of Brown Swiss cattle, raised at Regional Agricultural School in Van, were estimated. The data from 123 Brown Swiss cows sired by 29 bulls for a period of 25 years (1968 -1992), were used in this study.

The heritability estimates were obtained by the method of halfsib analysis on sire groups. The heritability estimates were 0.071 ± 0.104, 0.063 ± 0.098 and 0.142 ± 0.03, for calving interval, service period and gestation period respectively.

The repeatability estlmates were obtained by intraclass correlation obtained from the anlysis of variance. The repeatability estimates were 0.143 ± 0.039, 0.306 ± 0.058 and 0.462 ± 0.174 for calving interval, service period and gestation period respectively. Keywords : Brown Swiss Cattle, Heritability. Repeatability, Service period, Calving interval, Gestation pertod