Evaluación del Dipol como diluyente de recolección seminal y su efecto sobre la conservción y fertilidad de semen refrigerado de verraco

Abstract

At "Reprogenes" Gene Transfer Center and associated farms, located at km2 Riobamba-Guano, Riobamba canton, Chimborazo province, Dipol use was evaluated as diluent for seminal samples collection and its effect over the conservation and fertility of boar frozen semen, the seminal dose was applied to York Shyre-Landrace female pigs in their third and fourth birth. The treatments were distributed under a complete randomized design, evaluating different variables during the experiment which lasted 120 days. After finishing the experiment, the best average related to the spermatic characteristics after 168 hours of evaluation was determined for the boar heterospermic semen collected, by means of Dipol which reached an average of 83,30%, 3,31 points and 82,87% for the gross and individual motility and spermatic morphology respectively. On the other hand the doses made of heterospermic semen collected using Dipol, didn't show any bacterial growth after 168 hours of evaluation keeping a neutral pH relatively, while in the control group (without Dipol) there is bacterial growth after 72 hours of evaluation. The highest fertility rate in female pigs under artificial insemination was determined in those which were inseminated with heterospermic semen collected with the collecting diluent, reaching a 100% of fertility. That is why it is recommended to use Dipol as collecting diluents for diluted pig semen and its future preservation under refrigeration, since it showed good results from the reproductive, productive and economic viewpoint.