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Breed And Heterosls Effects On Testicular Development And Endocrine Function Of Puberal Boars, R. W. Fent, R. P. Wettemann, R. K. Johnson
Breed And Heterosls Effects On Testicular Development And Endocrine Function Of Puberal Boars, R. W. Fent, R. P. Wettemann, R. K. Johnson
Department of Animal Science: Faculty Publications
Purebred and two-breed cross Duroc, Landrace, Spotted and Yorkshire boars were evaluated at 218 ± 6 d of age to determine the influence of breed on testicular development and on concentrations of luteinizing hormone (LH) and testosterone in blood serum after treatment with gonadotropin releasing hormone (GnRH). Concentrations of LH and testosterone were determined in serum samples obtained from the vena cava of 139 boars just before and 1, 2, 3 and 4 h after an im injection of 200/ μg of GnRH. The right testes of 136 boars were removed and sperm numbers were determined in homogenates of testicular …