Chemical composition, fatty acid profile, including health indices of intramuscular fat, and technological suitability of the meat of young bulls of three breeds included in a genetic resources conservation programme fattened within a low-input system*

Zygmunt Litwińczuk, Piotr Domaradzki, Mariusz Florek, Paweł Żółkiewski
2016 Animal Science Papers and Reports   unpublished
Proximate composition and the proportions of 38 fatty acids (FA) were determined in the meat (m. longisimus lumborum and m. semitendinosus) of young bulls of 3 native Polish breeds (Polish Red-PR, White-Backed-WB and Polish Black-and-White-PBW) raised in a low-input system on a diet based on fodder from permanent grassland and slaughtered at the age of 18-20 months. The reference groups consisted of young bulls of the Polish Holstein-Friesian (PHF) and Simmental (SIM) breeds fattened in the
more » ... fattened in the same conditions. Breed was found to have a significant effect on the chemical composition, total collagen content and its proportion in total protein, protein hydration and net energy, as well as the FA profile, proportions and indices in the meat analysed. The technological properties of the native young bulls' meat showed intermediate values between the SIM (the most favourable) and the PHF (the least favourable) breeds. The beef obtained from the native breeds had more beneficial FA profiles (lower SFA and higher MUFA proportions), ratios (n6/n3 and h/H), and indices (AI and TI) than those from