<![CDATA[This study aimed to release the heat shock protein 70 by applying heat shock exposure programs at early ages on physical semen characteristics and blood constituents of Hi-Plus buck rabbits under hot conditions. A total number of 40 Hi-Plus buck rabbits were divided into four equals treatments: the 1sttreatment (C), bucks served as control. Rabbits of 2nd, 3rd and 4th treatments were exposed to heat shock program. The 2nd treatment (HSE30) exposed at 30 days of age, the 3rd treatment (HSE60) exposed at 60 days of age and the 4th treatment (HSE30+60) exposed at 30+60 days of age. HSP70 and blood metabolites were increased (P≤ 0.05) in the rabbits of HSE groups compared to control group. Triiodothyronine hormone was increased (P≤0.05) in HSE groups as compared to control group. Corticosterone hormone decreased (P≤0.05) in the rabbits of HSE groups as compared to control group. Physical semen quality was improved (P≤0.05) in rabbits of HSE groups as compared to control group. In conclusion, early heat shock exposure programs for buck rabbits might increase release of HSP70 which positive reflect on enhance physiological responses and physical semen characteristics under severe heat stress conditions.]]>
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