Profil histochemiczny miesni tucznikow w zaleznosci od rodzaju miesnia, plci, rasy, masy ciala i zywienia

• Autorzy: Migdal W , Wojtysiak D. , Pasciak P.

Warianty tytułu

EN

The histochemical profile of fatteners' muscles depending on the type of muscles, gender and breed of fatteners, their body weight, and feeding

• Języki publikacji: PL

Abstrakty

PL

Mięśnie szkieletowe świń mają określony profil włókien mięśniowych, który decyduje nie tylko o charakterze czynnościowym mięśnia, ale również o wartości technologicznej i kulinarnej. Przeprowadzono 5 doświadczeń, w których bezpośrednio po uboju tuczników (do 20 min) pobierano i zamrażano w ciekłym azocie próbki mięśni. Przeprowadzono reakcję histochemiczną na aktywność NADH2 (diaforazy) i wyróżniono trzy typy włókien mięśniowych: I - włókna czerwone, IIA - włókna pośrednie i IIB - włókna białe. Stwierdzono, że liczba włókien mięśniowych jest określona genetycznie, a występujące w niej zmiany mogą być spowodowane różnicami rasowymi (schematem krzyżowania). Tuczniki mieszańce po knurach rasy pietrain charakteryzowały się największym udziałem włókien mięśniowych białych, a najmniejszym udziałem włókien czerwonych w porównaniu z tucznikami mieszańcami po knurach rasy duroc. W mięśniach tych tuczników występowały najczęściej zmiany wielkości włókien. Średnica włókien mięśniowych uzależniona była od rasy, żywienia (lub dodatków np. izomerów CLA), masy ciała oraz rodzaju mięśnia. Płeć nie miała wpływu na kompozycję poszczególnych typów włókien mięśniowych, wpływała natomiast na średnicę włókien mięśniowych białych i pośrednich. Wraz ze wzrostem masy ciała zwiększała się średnica włókien mięśniowych. Procentowy udział włókien mięśniowych oraz średnica tych włókien zależały nie tylko od rodzaju mięśnia, ale również od miejsca pobrania próby w obrębie tego samego mięśnia.

EN

The pigs' skeletal muscles have a specific profile of muscle fibres, and this profile determines not only a functional character of each muscle, but, also, its technological and culinary properties. Five (5) experiments were performed during which samples of the muscles were taken upon the completed slaughter of fatteners, (not later than 20 minutes at the latest), and frozen in a liquid nitrogen. A histochemical reaction to determine the activity of NADH2 (diaphorase) was performed, and three (3) types of muscle fibres were distinguished: I - red fibres; IIA - intermediate fibres, and IIB - white fibres. It was stated that the number of muscle fibres was genetically determined, and changes occurring in this number could be caused by breed differences (cross-breeding scheme). The fatteners cross-bred with Pietrain boars were characterized by the highest per cent content of white fibres of muscles, and by the lowest per cent content of red fibres compared with the fatteners cross-bred with Duroc boars. In the muscles of the latter fatteners, changes in the size of fibres occurred most frequently. The diameter of muscle fibres depended on the breed, feeding (or supplements, for example CLA isomers), body weight, and muscles type. The gender had no effect on the composition of individual types of muscle fibres, however, it impacted the diameter of white and intermediate fibres of muscles. Together with the increase in the body weight, there was an increase in the diameter of muscle fibres. The per cent content of muscle fibres, as well as their diameter depended not only on the muscle type, but, also, on the place within the muscle itself from which a sample was taken.

Słowa kluczowe

PL

profil histochemiczny; plec zwierzat; masa ciala; zywienie zwierzat; trzoda chlewna; rasy zwierzat; miesnie; konferencje; wlokna miesniowe; Baranowo k.Poznania konferencja; tuczniki

EN

histochemical profile; animal sex; body weight; animal feeding; pig; animal breed; muscle; conference; muscle fibre; Baranowo near Poznan conference; fattener

• Wydawca: -
• Czasopismo: Żywność Nauka Technologia Jakość. Suplement
• Rocznik: 2005
• Tom: 12
• Numer: 3
• Opis fizyczny: s.157-168,rys.,tab.,bibliogr.

Twórcy

autor

Migdal W

• Akademia Rolnicza, ul.Balicka 122, 30-149 Krakow

autor

Wojtysiak D.

autor

Pasciak P.

Bibliografia

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