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Volume 53, issue 1
Arch. Anim. Breed., 53, 65–72, 2010
https://doi.org/10.5194/aab-53-65-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 53, 65–72, 2010
https://doi.org/10.5194/aab-53-65-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Oct 2010

10 Oct 2010

Relationships between the polymorphism of myosin heavy chains and selected meat quality traits of pigs with different susceptibility to stress

B. Grześ1, E. Pospiech1,2, M. Koćwin-Podsiadła3, A. Łyczyński4, E. Krzęcio, B. Mikołajczak, and E. Iwańska B. Grześ et al.
  • 1Institute of Meat Technology, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Poland
  • 2Department of Meat and Fat Technology of the Institute of Agricultural and Food Biotechnology in Poznań, Poland
  • 3Department of Pig Breeding and Meat Quality Evaluation, Faculty of Life Sciences, University of Podlasie, Siedlce, Poland
  • 4Department of Small Mammals Breeding and Raw Materials of Animal Origin, Faculty of Animal Breeding and Biology, Poznań University of Life Sciences, Poland

Abstract. The aim of the investigations was to analyse the share of myosin heavy chains (MHC) isoforms (type I, IIa, IIb, and IIx) in the longissimus thoracis et lumborum muscle derived from pigs of different RYR1 genotypes (TT – homozygous negative, CT – heterozygous, CC – homozygous positive). The composition of the MHC isoforms in the muscle tissue of the examined animals was referred to selected meat quality traits. It was revealed that the animals with the CT and TT genotypes were characterized by a significantly (P≤0.05) lower share of the type I and higher share of the type IIb MHC isoform in comparison to homozygotes CC. Inferior tenderness and water holding capacity of meat obtained from pigs susceptible to stress (TT) at 144 h after slaughter could have been associated, among others things, with the increased share of MHC isoform type IIb. The composition of MHC isoforms might be a useful indicator in breeding work in the selection of animals carrying the gene of susceptibility to stress.

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