Characterization of follicular dynamics and embryo production of the Creole bovine race. Compared to two races entered Holstein and Brown Swiss

The research will be carried out at the Granja de Irquis, from the University of Cuenca, located in the Victoria del Portete parish, Canton Cuenca, Azuay province. The objective aims to contribute to the knowledge of follicular dynamics, responses to synchronization, superovulation and obtaining embryos in Creole livestock, promoting the multiplication and conservation of the genetic material of this race, in order to recover germplasm of these animals adapted to the height ecosystem for milk production. For which 10 Creole breed heifers, 10 Holstein and 10 Brown Swiss will be used, in which follicular dynamics will be characterized, by using ultrasonography by measuring number and size of follicles and lute bodies, as well as, estrogen levels and blood progesterone, these measurements will be made daily. With the data obtained we will determine the number of follicular waves in each of the races under study. Finally, the response to synchronization, superovulation and embryo production of a pre -established protocol in the Creole race, Brown Swiss and Holstein will be evaluated and compared through the classification established by the "International Embryo Transfer Society". For statistical analysis, research has been separated in two stages: stage1; In which unifactorial multivariant (Manova) will be carried out with three levels of factor, with the objective to avoid correlations between the data. For stage 2: a unifactorial anova model will be used.

XII UNIVERSITY COMPETITION FOR RESEARCH PROJECTS UNIVERSITY OF CUENCA