Muscle Fiber Characteristics of Four Muscles from Different Cattle Breeds and their Relation to Meat Instrumental Toughness
|Kateg. publikace||Příspěvky ve sbornících|
The objective of the present study was to compare the muscle fiber characteristics of four muscles (longissimus lumborum (LL), semitendinosus (ST), biceps femoris (BF) and psoas major (PM)) collected from 37 Aberdeen Angus (AA), Gascon (GS), Holstein (HO), and Fleckvieh (FL) young bulls reared under identical housing and feeding conditions. Furthermore, the relationships between histochemical characteristics and instrumental meat toughness were evaluated. Significant differences between muscles were found in muscle fiber cross-sectional area (CSA), fiber type proportions and in the relative area of the muscle occupied by each fiber type. The smallest CSA of all fiber types was detected in the PM muscle while the highest values were found for the type I in the ST muscle and for the types IIA and IIB in the BF muscle. The lowest fiber type proportions and the relative areas of the muscle for types I, IIA and IIB were observed in ST, LL and BF muscles, respectively. Significant breed differences were only found in the ST and BF muscle. Higher proportions of type I fibers were detected in AA and HO than in GS and FL bulls. On the contrary, GS and FL animals had higher relative areas occupied by IIB fibers than the other groups.
|Projekt||Rozvoj hospodářských zvířat v multifunkčním zemědělství|
VÚŽV v.v.i. > Publikace > Detail publikace