Veterinarski arhiv, Vol. 79 No. 4, 2009.
Izvorni znanstveni članak
Phenotypic characteristics and heritability of m. longissimus dorsi chemical composition in Croatian Simmental bulls
Igor Štoković
; Department of Animal Husbandry, University of Zagreb, Faculty of Veterinary Medicine, Zagreb, Croatia
Ivo Karadjole
; Department of Animal Husbandry, University of Zagreb, Faculty of Veterinary Medicine, Zagreb, Croatia
Dubravka Križanović
; Department of Animal Husbandry, University of Zagreb, Faculty of Veterinary Medicine, Zagreb, Croatia
Pero Božić
; Croatian Livestock Reproduction Centre, Zagreb, Croatia
Anamaria Ekert Kabalin
; Department of Animal Husbandry, University of Zagreb, Faculty of Veterinary Medicine, Zagreb, Croatia
Sažetak
The Simmental breed is a dual purpose breed widespread in the Republic of Croatia and represents more than two thirds of the total cattle population. In this research we focused on the heritability of chemical components (dry matter, water, protein, fat and ash) in musculus longissimus dorsi (MLD) and its phenotypic characteristics. The trial comprised 698 young bulls, which were sons of 68 sires chosen for artificial insemination (AI), over a period of 13 years. Average chemical composition of MLD was as follows: dry matter 24.87 ± 0.04%, water 75.13 ± 0.04%, protein 20.63 ± 0.05%, fat (ether extract) 3.14 ± 0.06% and ash 1.10 ± 0.002%. We calculated heritability and phenotypic correlations among the chemical components and analyzed various influences for all components. All calculations were performed in SAS 8.0 (Statistical Analysis System) and Statistica 7.1 software. Phenotypic correlations between dry matter and water, protein, fat and ash were -1.00, 0.20, 0.50 and
-0.20, respectively. Correlations between water and protein, fat and ash were -0.20, -0.50 and 0.20, respectively. Correlation coefficient between protein and fat was -0.75; between protein and ash -0.05 and between fat and ash -0.10. All correlations were significant (P<0.01) except between protein and ash. Heritability estimates for the investigated traits were: final mass 0.73; dry matter 0.60; water 0.60; protein 0.40; fat 0.30 and ash 0.36. The influence of year, season and month on chemical composition of MLD was significant (P<0.01). Phenotypic correlations and heritability estimates could be used for selection in order to improve the investigated traits.
Ključne riječi
Simmental cattle; musculus longissimus dorsi; chemical composition; heritability
Hrčak ID:
45592
URI
Datum izdavanja:
10.7.2009.
Posjeta: 1.158 *