GOATS’ FOLLICLE AND CORPORA LUTEA DEVELOPMENT AS A RESPONSE TO SELENIUM SUPPLY

Abstract

Ovarian activity can be improved by applying hormones, which present a high cost and risk to health. The use of selenium will result in an alternative to improve ovarian activity. The study objective was to determine whether organic selenium (Se-O), in form of yeast enrichened with Se (Sel-Plex), improves the ovarian function in goats and whether the effect is immediate or indirect. Eighteen goats of local phenotype were used, previously synchronized at estrum, with body condition three, in a scale of one to five, located in Tlatlaya, Estado de México. The treatments were: group A: 300 mg of Se-O orally for 16 d
(n=nine), and group B: control (n=nine). Ovariotomies were carried out 13 d (three goats from each group), and 25 d (six goats from each group) after applying Se-O; the ovary with the highest number of ovarian structures was obtained, and both the ovaries and the follicles were measured (classified as small, medium and large), and the follicles and corpora lutea were counted. A completely random design was used, a variance analysis was performed with transformed data (SAS GLM procedure), and the follicular variables were compared with the Tukey test (P?0.05). For differences between corpora lutea, the Poisson distribution test was used. The Se-O at a dosage of 300 mg of Se-O animal^-1 16 days increased the number of follicles, both small and large (P?0.05), as well as the corpora lutea and size of the ovary (P?0.05). It is concluded that the Se-O increases the number of ovarian structures and the size of the ovary.