HISTOLOGICAL STRUCTURE OF MUSCULUS LONGISSIMUS DORSI IN PIGS WITH THE SAME RYANODINE RECEPTOR GENOTYPE (CC) IN RELATION TO MEAT QUALITY INDICATORS

Z. ELIÁŠ, S. HLUCHÝ, R. TOMAN

Abstract


The aim of this study was to investigate the histological structure of pig longissimus muscle in relation to indicators of meat quality. A total number of 16 pigs about 101.28 kg average live weight of the same CC RYR -1 genotype were used. Animals were raised on Fattening and Carcass Value Experimental Station (FCVES) of SUA in Nitra on equal conditions, fed with standard nutrition fortified with vitaminmineral mixture and slaughtered on experimental abattoir of FCVES. Samples from musculus longissimus dorsi (MLD) for histological evaluation were taken within 30 minutes after slaughter, immediately frozen in liquid nitrogen and stored at temperature -20°C. On experimental abattoir of FCVES feeding indicators, and indicators of meat quality and carcass value were observed. Samples were histochemically processed and single types of muscle fibers were differentiated according to reaction on SDH on the basis of method by Vacek (1974). Microscopic system Nikon, digital camera Pixelink and software for image analyse LUCIA for morphometric analysis of MLD structure were used. Histological evaluation of MLD showed highest abundance of white and lowest abundance of intermediate muscle fibers, and highest variability in red muscle fibers. Concerning to the average muscle fiber diameter, the highest values in white and the lowest values in red muscle fibers were obtained. Negative correlations between white muscle fiber content and pH1 in MLD and thigh and pH24 in thigh were obtained. Pearson´s correlation coefficients showed positive correlation of white and red muscle fiber diameter to pH1 and pH24 in thigh. Concerning to free water content negative correlations of intermediate and white muscle fiber diameter were found.


Keywords


pig; MLD; muscle fibers; meat quality

Full Text:

PDF

Refbacks

  • There are currently no refbacks.


Copyright (c)


Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
_________________________________________________________________

Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Faculty of Animal Science and Biotechnologies
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
Phone: +40-256-277160, Fax.: +40-256-277110