Effects of intramuscular injections of vitamin E-selenium and a gonadotropin releasing hormone analogue (GnRHa) on reproductive performance and blood metabolites of post-molt male broiler breeders

Abstract

Objective: To investigate the effects of intramuscular injection of vitamin E-selenium and a GnRH analogue (GnRHa) on reproductive performance and serum biochemical parameters in post-molt male broiler breeders. Methods: A total of 32 ROSS 308 male broiler breeders (60 weeks of age) were induced to molt and then were randomly distributed into four groups: group 1 (control) without any injection, group 2 subjected to intramuscular of 0.1 mL/kg body weight of vitamin E-selenium, group 3 subjected to intramuscular of 0.3 mL. Receptal solution as a GnRHa and group IV subjected to intramuscular both of vitamin E-selenium and GnRHa. Results: The results showed that the egg hatchability and fertility percentages were increased and the eggs infertility percentage declined significantly in groups 3 and 4 (P  0.05). The results of blood biochemical parameters indicated that serum glucose was higher in group 3 which was injected with GnRHa (P  0.05). The results showed that serum testosterone concentration was increased in groups 3 and 4 (P  0.05). Conclusions: It is concluded that reproductive performance and serum testosterone in post-molt male broiler breeders were improved by treated with vitamin E-selenium and GnRHa