Phenotypic correlation of traits of production and reproduction of Simmental cows in different regions of Serbia
The main goal of this research was to examine, using modern methods, the variability of phenotypic correlations of production performances and reproductive properties of Simmental cows reared on the farms of individual agricultural producers, in different breeding areas of the Republic of Serbia. Th...
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Veröffentlicht in: | Biotechnology in animal husbandry 2019, Vol.35 (3), p.219-228 |
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Sprache: | eng |
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Zusammenfassung: | The main goal of this research was to examine, using modern methods, the
variability of phenotypic correlations of production performances and
reproductive properties of Simmental cows reared on the farms of individual
agricultural producers, in different breeding areas of the Republic of
Serbia. The study of phenotypic correlations of milk performance and
fertility properties in different regions of Serbia was carried out on a
total of 3.056 primi parous Simmental heifers under control, with lactations
completed within one year. The examined animals were reared on different
individual farms, and mainly in very different conditions of housing and
nutrition, depending on the breeding area. The study of phenotypic
correlations included the following milk performance traits: milk yield,
milk fat content, milk fat yield, yield of 4% corrected milk; and fertility
properties: age at first calving and service period. The results of the
study among other things indicate that although the phenotypic correlations
between the fertility and milk performance properties show different degrees
of variation, they should be taken into account in the final assessment of
the breeding value of the animal, so that the breeding selection programs
are more comprehensively designes. |
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ISSN: | 1450-9156 2217-7140 |
DOI: | 10.2298/BAH1903219P |