The Endocrine Function of Testes in 12- and 18-Month-Old Boars of Different Breeds

Document Type : Original Articles


1 Department of Epizootology, Radiobiology, and Pharmacology, I.I. Ivanov Kursk State Agricultural Academy. 305021, Kursk, K. Marxa Str., 70

2 Candidate of Agricultural Sciences, Kursk Institute of Cooperation (branch) of BUKEP. 305004 Kursk, Radishcheva Str., 116

3 Kursk Institute of Cooperation (branch) of BUKEP. 305004 Kursk, Radishcheva Str., 116


Testes have several primary functions, such as male gametes production (spermatozoa) and secretion of several endocrine factors, including the production of steroid and protein hormones which facilitate elements in the healthy reproductive function of mammals. The potential of an animal functional endocrine reservoir could be an interesting finding in animal reproduction management. Therefore, the current study aimed to analyze the functional endocrine reserves of testes in 12- and 18-month-old boars of four different boar breeds, namely Large White, Landrace, Duroc, and Tempo, as the animal model in this research (n=10). To determine the functional endocrine reserves of the testes at 12 and 18 months of age, boars received injections of  human chorionic gonadotropin (hCG) 3 times every 72 hours. Testosterone was measured in blood samples (10 mL) taken from the jugular vein before the administration of hCG as well as 2, 12, 24, 48, and 72 hours after administration of each of three hCG injections. The index of endocrine activity of the testes was determined by the formula: Ita = Т1 –Т0 / Т0, where Ita is the index of endocrine activity of the testes, T0 is the testosterone concentration before the administration of hCG, and T1 is the maximum testosterone concentration after the third administration of hCG. The effects of the hCG injection on boar testes at different age periods indicated that the testes of Large White and Duroc boars have higher potential endocrine reserves compared with the Landrace and Tempo breeds.


Main Subjects

Article Title [French]

La Fonction Endocrinienne des Testicules chez les Sangliers de 12 et 18 Mois de Différentes Races

Abstract [French]

Les testicules ont plusieurs fonctions principales, telles que la production de gamètes mâles (spermatozoïdes) et la sécrétion de plusieurs facteurs endocriniens, notamment la production d'hormones stéroïdiennes et protéiques qui facilitent les éléments de la fonction reproductive saine des mammifères. Le potentiel d'un réservoir endocrinien fonctionnel animal pourrait être une découverte intéressante dans la gestion de la reproduction animale. Par conséquent, la présente étude visait à analyser les réserves endocriniennes fonctionnelles des testicules chez des Sangliers de 12 et 18 mois de quatre races différentes de Sangliers, à savoir Large White, Landrace, Duroc et Tempo, comme modèle animal dans cette recherche (n=10). Pour déterminer les réserves endocriniennes fonctionnelles des testicules à 12 et 18 mois, des Sangliers ont reçu des injections de gonadotrophine chorionique humaine (hCG) 3 fois toutes les 72 heures. La testostérone a été mesurée dans des échantillons de sang (10 mL) prélevés dans la veine jugulaire avant l'administration d'hCG ainsi que 2, 12, 24 48 et 72 heures après l'administration de chacune des trois injections d'hCG. L'indice d'activité endocrinienne des testicules a été déterminé par la formule: Ita = Т1 –Т0 / Т0, où Ita est l'indice d'activité endocrinienne des testicules, Т0 est la concentration de testostérone avant l'administration d'hCG, et Т1 est la concentration maximale de testostérone après la troisième administration d'hCG. Les effets de l'injection d'hCG sur les testicules des Sangliers à différentes périodes d'âge ont indiqué que les testicules des Sangliers Large White et Duroc ont des réserves endocriniennes potentielles plus élevées que celles des races Landrace et Tempo.

Keywords [French]

  • Sangliers
  • races
  • Large White
  • Landrace
  • Duroc
  • Tempo
  • Testostérone
  • Gonadotrophine Chorionique
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