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Muscle fibre types, fat deposition and fatty acid profile of Casertana versus Large White pig

Salvatore Velotto
University of Study of Naples Federico II, Department of Soil, Plant, Environmental and Animal Production Sciences - Faculty of Agriculture, Via Universitŕ 133, 80055 Portici (NA), Italy
Abstract :
Used were 8 castrated males and 8 entire females of indigenous Casertana and Large White pigs, 4
animals of each breed. In
Longissimus dorsi
(LD) and
Psoas major
(PM) muscles the morphometric
characteristics of FG (
fast glycolytic
), FOG (
fast oxidative glycolytic
) and SO (
slow oxidative
) fibre
types was performed and their percentage determined. Determined was also the area of adipocytes
from internal and external layer of adipose tissue from backfat, shoulder, dorsal and loin regions. The
SO were larger than FG and FOG fibres (P< 0.05-0.001) and the size of FG fibres was significantly
different among the two breeds considered, higher in Large White pigs and lower in Casertana.
LD muscle was characterized by FG and SO fibres larger than PM (P<0.001). Males had fibres
larger than females in both muscles and breeds. The dorsal region had bigger adipocytes in both
the pig breeds (P<0.05-0.01). In comparison with the outer fat layer, the inner and middle layers
showed more developed adipocytes. Differences in fatty acid composition were observed between
breeds. Particularly, Casertana pigs showed higher level of essential fatty acids than did Large
White. The results showed the particular characteristics of the Casertana breed as compared to pig

lines intensively selected for growth efficiency

Keywords :
dipocyte /fat / fatty acid / fibre type / meat / muscle / pig

Date Deposited : 01 Apr 2015 15:13

Last Modified : 01 Apr 2015 15:13

Official URL: http://www.ighz.edu.pl/?p0=5&p1=34&o=7497

Volume 30, Number 1, - 2012

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