<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The commercial crossbreds with various genotypes and different growth rates in terms of the fattening and slaughter value as well as the microstructure and the quality characteristics of <italic>musculus biceps brachii</italic> were investigated. The experiment involved 38 bulls: 20 crossbreds obtained from Polish Black-and-White Lowland dams (BW) sired by Limousin bulls (LIM) – group I, and 18 crossbreds obtained from BW cows and Simmental bulls (SIM) – group II. The animals of both groups were divided into low growth rate (LG I and LG II; daily weight gain ≤900 g/day) and high growth rate category (HG I and HG II; >900 g/day). The results show that significantly better dressing percentage and carcass conformation (based on the EUROP carcass classification system) were attained by BW × LIM hybrids. The genotype of bulls did not influence the content of valuable cuts in carcass and meat content of cuts, as well as most characteristics of the meat quality. The differences (P&lt;0.05) in anaerobic index were noticed in both genetic groups of bulls in the two growth rate categories. The findings presented in the experiment also show that the number of bulls with giant fibres (GF) and the size of GF was greater in more intensively growing bulls (P&lt;0.05) and it probably determined the higher values of tenderness and acidity of <italic>biceps brachii</italic> muscle. It should be noticed that the increased growth rate of bulls may result in poorer quality of meat.</p></abstract>

The commercial crossbreds with various genotypes and different growth rates in terms of the fattening and slaughter value as well as the microstructure and the quality characteristics of musculus biceps brachii were investigated. The experiment involved 38 bulls: 20 crossbreds obtained from Polish Black-and-White Lowland dams (BW) sired by Limousin bulls (LIM) – group I, and 18 crossbreds obtained from BW cows and Simmental bulls (SIM) – group II. The animals of both groups were divided into low growth rate (LG I and LG II; daily weight gain ≤900 g/day) and high growth rate category (HG I and HG II; >900 g/day). The results show that significantly better dressing percentage and carcass conformation (based on the EUROP carcass classification system) were attained by BW × LIM hybrids. The genotype of bulls did not influence the content of valuable cuts in carcass and meat content of cuts, as well as most characteristics of the meat quality. The differences (P<0.05) in anaerobic index were noticed in both genetic groups of bulls in the two growth rate categories. The findings presented in the experiment also show that the number of bulls with giant fibres (GF) and the size of GF was greater in more intensively growing bulls (P<0.05) and it probably determined the higher values of tenderness and acidity of biceps brachii muscle. It should be noticed that the increased growth rate of bulls may result in poorer quality of meat.

Effect of Commercial Crossbreeding and Growth Intensity on Slaughter Indicators, Microstructure and The Quality Characteristics of Biceps Brachii Muscle in Bulls

Department of Cattle Breeding and Milk Evaluation, Siedlce University of Natural Sciences and Humanities, Prusa 14, 08-110 Siedlce, Poland

Department of Cattle Breeding, University of Technology and Life Sciences, Mazowiecka 28, 85-084 Bydgoszcz, Poland

Department of Animal Physiology, University of Technology and Life Sciences, Mazowiecka 28, 85-084 Bydgoszcz, Poland

Annals of Animal Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The commercial crossbreds with various genotypes and different growth rates in terms of the fattening and slaughter value as well as the microstructure and the...

Effect of Commercial Crossbreeding and Growth Intensity on Slaughter Indicators, Microstructure and The Quality Characteristics of Biceps Brachii Muscle in Bulls

Published Online: Jul 29, 2014

Page range: 673 - 683

Received: Aug 29, 2013

Accepted: Jan 17, 2014

DOI: https://doi.org/10.2478/aoas-2014-0024

Keywords
bulls, commercial crossbreeding, growth rate, muscle microstructure, beef quality

© 2014 Krzysztof Młynek et. al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of Commercial Crossbreeding and Growth Intensity on Slaughter Indicators, Microstructure and The Quality Characteristics of Biceps Brachii Muscle in Bulls

Published Online: Jul 29, 2014

Page range: 673 - 683

Received: Aug 29, 2013

Accepted: Jan 17, 2014

DOI: https://doi.org/10.2478/aoas-2014-0024

Keywordsbulls, commercial crossbreeding, growth rate, muscle microstructure, beef quality

© 2014 Krzysztof Młynek et. al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
bulls, commercial crossbreeding, growth rate, muscle microstructure, beef quality