Estimation of genetic parameters of claw formation in Holstein and Slovak Spotted cattle
2023
Chalupková, Monika
The aim of the study was to analyse the claw conformation traits in selected groups of Holstein and Slovak Spotted cows and estimate their heritability and genetic correlations between them separately for each breed. Images of the right hind claw taken during functional trimming were analysed using the NIS Elements 3.0. The pedigree database was processed by the CFC program. Genetic correlations and heritability of claw conformation traits were estimated using the generalised linear mixed model. Lower average values of claw conformation traits were found in Holstein cows compared to the group of Slovak Spotted cows. The variability of analysed traits was significantly affected in both groups by the effect of sire, calving year and season. Both positive and negative genetic correlations were observed between the claw conformation traits in the evaluated groups. In the Holstein cows, the highest positive genetic correlation was found between claw length and diagonal (0.91). In the group of Slovak Spotted cows, the highest positive genetic correlation was found between claw width and functional claw area (0.87). The heritability of tested claw conformation traits was moderate, with an average h2 value of 0.30 ±0.09.
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书目信息
出版者 Slovak University of Agriculture in Nitra, Faculty of Agrobiology and Food Sciences
ISSN 1336-9245