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Articles by Lamiaa Mostafa Radwan
Total Records ( 1 ) for Lamiaa Mostafa Radwan
  Lamiaa Mostafa Radwan , Mahmoud Yousef Mahrous , Neima Koutb Alsenosy and Mohamed Ibrahim El Sabry
  Background and Objective: The global warming is a hot topic for poultry scientists because of its negative influence on the quantity and the quality of poultry production. This study was conducted to investigate the influence of heat stress on Myogenin and uncoupling protein (UCP) genes expression and some carcass traits in two strains of broilers. Materials and Methods: This study was divided into two separate experiments, which were conducted at the same time. In the both experiments, chicks were exposed to 24°C (control) or 2 h/day at 2-7 days of age and against exposed to 40°C or 3 h/day at 33-34 days of age (treated), while chicks were fed a starter diet contained 23 and 25% crude protein in first and second experiments, respectively. At days 4 and 35 of age, samples were collected to determine the gene expression using qRT-PCR. At slaughter, carcass traits were measured. The Myogenin gene which responsible for the formation of muscle tissues is severely affected by heat stress which resulted in a depression in carcass and muscles weight. So, from a practical point of view it’s an important to compensate this accursed depression by raising the protein level in broiler diets. Results: The results showed that body weight, carcass, breast muscle relative weights of Cobb were significantly heavier compared to Ross. In general, the gene expression of both Myogenin and UCP genes were negatively influenced by heat stress, however, the increase in the protein (percentage) mitigated delirious heat stress effect, in both strains. Conclusion: Increasing the protein percentage may be used to alleviate the influence of heat stress and maintain the high yield of broilers.
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