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2007, vol. 23, br. 5-6-2, str. 267-275
Uticaj genotipa na karakteristike mišićnog vlakna m. longissimus lumborum tovljenika
Department of Reproduction and Animal Anatomy, Agriculture University, Krakow, Poland + Department of Animal Products Technology, Agriculture University, Krakow, Poland

e-adresawmigdal@ar.krakow.pl
Ključne reči: mišićna tkiva; histohemija; m. longissimus lumborum; tovljenici
Sažetak
Cilj ovog istraživanja je bio poređenje histohemijskog sadržaja mišića m. longissimus lumborum kod tovljenika meleza različitih rasa. Istraživanje je izvedeno na 36 tovljenika tri različita meleza (12 životinja u svakoj grupi): grupa I [♀durok x hempšir♂], grupa II [♀poljski landras x (durok x hempšir)♂] i grupa III [♀(poljski landras x poljska bela velika) x (durok x hempšir)♂]. U roku od 20 minutak post mortem uzorci mišića su uzeti za histohemijsku analizu sa m. longissimus lumborum na desnoj polutki. Radi razlikovanja tipova mišićnih vlakana: tip I (crvena), tip IIA (srednja), i tip IIB (bela) delovi su bojeni za aktivnost dehidrogenaze NADH2 (diaforaza).Ocenjivan je procenat mišićnih vlakana, oblast poprečnog preseka (CSA) i relativna ovlast (RA). Dobijeni rezultati ukazuju da je genotip tovljenika imao uticaj na sastav mišićnog vlakna - posebno na procenat i veličinu mišićnog vlakna. Najveći poprečni presek belih i srednjih vlakana je utvrđen kod tovljenika grupe III, dok je u grupi I utvrđena najmanja oblast poprečnog preseka. Osim toga, veća oblast poprečnog preseka crvenih vlakana je utvrđena kod grupe III u poređenju sa grupom I i II, između kojih nisu utvrđene signifikantne razlike. Takođe, m. longissimus lumborum kod tovljneika iz grupe III su imali viši procenat belih tkiva i niži procenat crvenih tkiva, nego mišići tovljenika iz grupa II i I. S druge strane, genotipovi tovljenika nisu uticali na relativne oblasti tipova vlakana (RA). Razlike u karakteristikama mišićnog tkiva između ispitivanih meleza tovljenika su imale uticaj na kvalitet mesa sa aspekta konzumacije.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.2298/BAH0702267W
objavljen u SCIndeksu: 23.01.2008.