Transcriptional Profile and Meat Quality Attributes of Abo-Deleek Lambs Managed under Intensive and Semi-Intensive Production Systems of Egypt
Transcriptional Profile and Meat Quality Attributes of Abo-Deleek Lambs Managed under Intensive and Semi-Intensive Production Systems of Egypt
Zayed Mohammad Ali I.1*, Mona Mohamdy1, M.F. Shehata1, Nasser Ghanem2
ABSTRACT
Feeding regime and genetic potentiality for muscle development and growth are major factors affecting sheep meat production. Therefore, the aim of this study was to evaluate the potential of Abo-Deleek lambs in meat production under different management systems. Sixteen Abo-Deleek lambs aged six months were used in the present study. Experimental lambs were divided according to body weight into two similar groups and then randomly allocated to two different management systems, intensive (G1=22.31± 3.95kg) and semi-intensive (G2=22.34±1.98kg). At the end of the experiment, fourteen lambs were slaughtered to evaluate carcass traits. There was no significant (P< 0.05) difference on average pre slaughter weight (37.63± 2.97 and 36.88±3.83kg) for G1 and G2, respectively. However, significant differences were obtained between G1 and G2 in dressing percentage based on slaughter weight (49.11 vs. 46.21 %), liver percentage (1.74 vs. 1.39%) and percentages of edible parts (2.60 vs. 2.14%). Our results indicated that animals rose under semi-intensive system has more fat content in their eye muscle linked with increased expression of CPT-1 gene compared with animals rose under intensive system. This could be due to free movement which increased fat mobilization into muscle tissue through up regulation of CPT1 gene required for oxidation of fatty acids to meet their increased metabolic demand. Our data indicated the potential of Abo-Deleek lambs in meat production under different management systems which contribute in solving the problem of animal production shortage in Egypt. Molecular regulation of genes involved in muscle development is similar between the two production systems although semi-intensive system induces upregulation of fatty oxidation due to increasing demand for energy utilized in free movement of animals.
Keywords | Transcriptional profile, Meat quality, Abo-Deleek lambs
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June 2022
Vol. 10, Iss. 6, Pages 1189-1422
