Year:2022   Volume: 4   Issue: 4   Area:

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  3. ID: 230

Abdullah Hameed SALIM

THE EFFECT OF THE INTERACTION BETWEEN TWO MUTATIONS MSTN/T434C AND CAST/T350C ON CARCASS AND MEAT TRAITS IN ARABI SHEEP IN IRAQ

This study was carried out on a sample of 49 Iraqi Arabi sheep in a slaughterhouse in the Thi Qar Governorate in southern Iraq . Laboratory tests were done in the physiology lab of the Faculty of Agriculture and the Marshes at University of Thi Qar .The study aimed to find out the impact of the interaction between two mutations (MSTN/T434C and CAST/T350C) on the Myostatin and Calpastatin genes, respectively, on some characteristics of sheep carcass and meat after slaughtering sheep and recording the sex and age of the animal. The results of the study showed a significant difference (P≤0.05) of the interaction between the two mutations in the characteristics of live body weight, dressing ratio and carcass diameter by the superiority of the CCTT genotype in the characteristic of live body weight and the superiority of the TTTC genotype in the characteristic of the dressing ratio, while the superiority of the TTCC genotype in the characteristic of the carcass diameter and neither of the two traits showed both the hot weight and length of the carcass significant differences between the four genotypes that appeared between the resulting interactions. Significant differences (P≤0.05) appeared for the effect of the interaction between the two studied mutations on the Myostatin and Calpastatin genes in the meat pH characteristics and the muscle fibers breakage index, where the TCTC interaction outweighed the TTCC interaction while it did not differ significantly with the other three interactions in the pH. As for muscle fiber fracture index, the TTCC genotype was significantly superior to the CCTT genotype, but it was not significantly superior to the TTTC and TCTC interference, respectively.

Keywords: Arabi Sheep, Carcass Traits, Mutations Interaction, CAST And MSTN Genes.

http://dx.doi.org/10.47832/2717-8234.13.15


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