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.: Home > Animal Science Papers and Reports > 2004 > Volume 22 Number 4 > Joanna Bogucka1, Wojciech Kapelaٌski2

Microstructure traits of longissimus lumborum muscle in Polish Landrace and crossbred Stamboek and Torhyb pigs

Joanna Bogucka1, Wojciech Kapelaٌski2
1 Division of Animal Histology, University of Technology and Agriculture, Mazowiecka 28, 85-084 Bydgoszcz, Poland 2 Department of Pig Breeding, University of Technology and Agriculture, Mazowiecka 28, 85-084 Bydgoszcz, Poland
Abstract :

Material consisted of 98 castrated males of Polish Landrace (PL), and crossbreds from Dutch
Stamboek (S) and Polish Torhyb (T) crossing programmes. The samples of Longissimus lumborum
were frozen in liquid nitrogen. Microscopic preparations were subjected to a histochemical reaction
to differentiate the types of muscle fibres varying in enzymatic activity. Proportion of each muscle
fibre type was determined. Fibre diameters were also measured using the Q 500 MC Leica Image
Analysis System. Proportions of muscle fibre types were similar in all three groups. Proportion of STO fibres ranged from 13.42 (in T) to 14.90% (in PL). The highest number of FTO (18.50%) and the least of FTG fibres (68.08%) were observed in T crossbreds. The least share of FTO fibres (16.00%) and the highest of FTG fibres (70.50%) were shown in S pigs. S pigs had the least diameters of all muscle fibre types (STO – 43.12, FTO – 37.76 and FTG – 49.90 ىm) and the highest number of all fibres on the surface of 1.089 mm2 (230.50). The most beneficial pH1 value (6.41) and WHC (19.78%) were shown in S pigs. Better traits of meat quality were related to fine-fibre structure of longissimus lumborum.

Keywords :
microstructure / muscle / pigs

Date Deposited : 11 Aug 2011 13:09

Last Modified : 11 Aug 2011 13:09

Official URL: http://www.ighz.edu.pl/

Volume 22, Number 4, - 2004

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