Genetic variability and correlations between fertility traits monitored in progeny tests of Holstein Friesian bulls
2005
Djedovic, R., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Latinovic, D., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Bogdanovic, V., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Trifunovic, G., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Petrovic, M.M., Institute for Animal Husbandry, Belgrade - Zemun (Serbia)
Genetic parameters for fertility traits were established on two farms with Black and White and Holstein Friesian breeds. Investigations encompassed a total of 2,664 calves, the offspring of 24 bulls. Coefficients of heritability were evaluated using a mixed least square model. Coefficients of heritability for investigated fertility traits were relatively low. Evaluated heritabilities and their errors for type of calving, number of stillborn calves, body weight at birth, and duration of pregnancy, were: 0.190 +/- 0.062; 0.018 +/- 0.006; 0.149 +/- 0.051 and 0.288 +/- 0.086, respectively. Coefficients of genetic correlation ranged between 0.187 (correlation between the number of stillborn calves and duration of pregnancy), and 0.340 (correlation between the number of stillborn calves and body weight at birth).
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