Thesis (M.A. Agricultural Management (Animal Production)) -- University of Limpopo, 2016 / A total of 320 male and female day old Ovambo and Potchefstroom koekoek (PK)
chickens, were randomly assigned to a 2 (breed) × 2 (sex) factorial arrangement in a
completely randomised design. Meat quality traits of male and female Ovambo and
Potchefstroom Koekoek chickens were evaluated in this comparative study. The
chickens were raised from day-old and fed on a commercial grower diet with 11.5
MJ/ME kg DM and 20% crude protein. The carcass traits of the Ovambo and
Potchefstroom Koekoek (PK) were similar (P>0.05) except for breast yield. Sex
affected on all carcass traits. Breed, sex, and time interactions influenced colour
parameters of thigh and drumstick meat except redness (a*) and yellowness (b*)
values of chicken breast meat. The pH varied significantly (P<0.05) between the
breeds, sex and time period. The sensory evaluations of the chicken breeds were
similar (P>0.05). However, tenderness of the breast meat as measured by shear
force was higher for PK than that of Ovambo chickens. Fatty acid profiles of the
chickens were not affected (P>0.05) by breed or sex. The ratios of n-6 and n-3 fatty
acids were significantly lower in both breeds which are desirable in reducing the risk
of many heart-related diseases. The information obtained from this study can assist
efforts to promote production of indigenous chickens. The information also sheds
some light in terms of consumer awareness for healthier meat choices.
Keywords: Breed, Carcass traits, Meat colour, meat pH, Fatty acids
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:ul/oai:ulspace.ul.ac.za:10386/1486 |
| Date | January 2016 |
| Creators | Motsepe, Ramokone Johanna |
| Contributors | Norris, D., Mabelebele, M. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | ix, 52 leaves |
| Relation | Adobe Acrobat Reader |
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