Evaluar la capacidad reproductiva del esperma de gallos criollos criopreservado al 8% de glicerol en la fecundidad de gallinas criollas

Abstract

The evaluation of the post-thawing seminal quality and the productive indicators of the eggs, do not depend on the characteristics of the biotypes of the reproductive parents since these do not affect the fecundity. It was carried out the evaluation of the reproductive capacity of the sperm of Creole roosters (Cuban, Barbones and Guaricos), cryopreserved at 8% glycerol in the fecundity of Creole hens, by means of the intravaginal artificial insemination method. For this process, 27 Creole hens with homogeneous weights and ages were used, which had a training period of 30 days to facilitate the exposure of the vagina and the regulation of the posture for the insemination process. Each hen was inseminated for five consecutive days, using a total of 180 straws of 0.25 ml. The descriptive experimental field study was evaluated using Chi² tests. The progressive motility in the genetic material after thawing did not show differences between biotypes (P>0.05), while the mass motility was in favor of the Cuban biotype (P<0.05). Egg weight and dimension did not show differences (P>0.05) between biotypes. Fertility and hatchability percentages also showed no differences (P>0.05). It was concluded that the reproductive capacities of the different hen biotypes are not affected by the genetics of the parents, but by other environmental factors to be studied. These data support that these techniques are reliable and can be used in assisted reproduction and artificial insemination techniques in other galliform species and birds in general.

Keywords: Fertility, creole hens, glycerol, hatchability, artificial insemination.