Comparação da produção embrionária de doadoras GIR leiteiro e Girolando (GIR leiteiro x holandês)

Abstract

Over the years, biotechnology applied to animal reproduction has made significant advances, such as in vitro embryo production (IVP) has been increasingly used and accessible, and approaching the subject, the research aimed to evaluate the effect of the genetic group of a Zebu dairy breed being Gir milkman dairy and a synthetic Girolando (Gir milkman x Holstein) in PIVE. The mean total and viable oocyte production and embryo production by donors of the same breed were evaluated in the period of March 2023. The data were provided by the company Fertilife referring to a dairy farm in the state of Goiás. For this purpose, ultrasound-guided follicular aspiration (ovum pick up - OPU), tracking and selection of oocytes was performed. Data were evaluated by analysis of variance to assess the effect of race, and means were compared by TUKEY'S test at 5% significance. The average amount of oocytes per cow was higher in the Girolando (Gir milkman x Holstein) when compared to the Gir milkman breed. The number of embryos was higher in the Girolando (Gir milkman x Holstein) when compared to the Gir milkman breed. In this way, the Girolando breed (Gir milkman x Holstein) obtained better indexes for both variables studied