de.mpg.escidoc.pubman.appbase.FacesBean

Post

 
 Vis
  Can combination of birth weight and post-weaning growth rate affect tenderness of Longissimus dorsi muscle of lamb?
Item is

Ophav

 Ophav:
Berhe, Daniel Tsegay1, Forfatter
Hansen, Hanne H.1, Vejleder
Karlsson, Anders Hans1, Vejleder
Tilknytninger:
1Det Biovidenskabelige Fakultet, København, Danmark, diskurs:18              
skjul Ophav
Vis Ophav

Indhold

Ukontrollerede emneord: -
 Abstract: The objective of this study was to investigate the effect of combination of birth weight (BW) and post-weaning growth rate (PWGR) on tenderness of Longissimus dorsi (LD) muscle using 33 lambs. Lambs were weighed within 24 h after birth and grouped into 2 groups (Low: 3.42 ± 0.11 kg, n=19 and High: 6.19 ± 0.12kg, n=14) based on their birth weight. After weaning, further grouping of each group was made based on random grouping into 2 different growth rates (Slow and fast ) and hence four treatment groups were formed (low-slow (L-S), n= 8; low-fast (L-F), n=11; high-slow (H-S), n= 8; and high-fast (H-F), n=6). The post-weaning growth rate was managed by feeding the lambs in pasture comprised of different vegetation. The slow and fast growing categories grew on average of 64 ± 5.5 and 155 ± 5.5 g/day, respectively from weaning to slaughter. All lambs were slaughtered at an average age of 167 ± 3.6 days. Myofibril fragmentation and Sensory evaluation were performed at 24 h post-mortem in LD muscle. The mean particle size (D(v,0.1)) value and volume to surface area mean diameter (D(3,2)) value of the muscle of the L-S group were significantly greater compared to the H-S treatment group (D(v,0.1), P <0.01; D(3,2), P = 0.02). The D(v,0.1) value and D(3,2) value of the muscle of the L-F and H-F groups were not significantly different (D(v,0.1), P > 0.05; D(3,2), P > 0.05). The D(v,0.1) value and D(3,2) value of the muscle of the L-S group were significantly greater compared to the L-F group (D(v,0.1), P = 0.007; D(3,2), P < 0.01). The D(v,0.1) value and D(3,2) value of the muscle of the H-S and H-F groups were not significantly different (D(v,0.1), P > 0.05; D(3,2), P > 0.05). The D(v,0.1) value and D(3,2) value of the muscle of the L-S group were significantly larger compared to the L-F, H-S and H-F groups (D(v,0.1), P = 0.03; D(3,2), P = 0.049). The combination of the main effects (birth weight and post-weaning growth rate) didn’t show any significant difference in tenderness score. However, there was significant effect of the post-weaning growth rate when the data was analysed for each main effect and the slow growing group was scored higher for tenderness compared to the fast growing group. Based on the results from the myofibril fragmentation method, it was concluded that reduced birth weight combined with slow growth rate affected the tenderness of the muscle.
skjul Indhold
Vis Indhold

Filer

Bemærkninger:
-
Tilgængelighed:
Offentlig
Mime-type / størrelse:
application/pdf / 682KB
Copyright dato:
-
Copyright information:
De fulde rettigheder til dette materiale tilhører forfatteren.
skjul Filer
Vis Filer

Basal

Bogmærk denne post: https://diskurs.kb.dk/item/diskurs:12773:2
 Type: Speciale
skjul Basal
Vis Basal

Links

Vis Links

Detaljer

Sprog: English - eng
 Datoer: 2010
 Sider: 54 pages
 Publiceringsinfo: København, Danmark : Institut for Fødevarevidenskab
 Indholdsfortegnelse: -
 Note: Food Science and Technology, Food Science and Technology
 Type: Speciale
skjul Detaljer
Vis Detaljer

Kilde

Vis Kilde