Niveles plasmáticos de la hormona antimülleriana y su relación con la población folicular en hembras Brahman
Resumen
La hormona antimülleriana (HAM) funciona como un modulador del desarrollo folicular y su nivel plasmático es independiente de la etapa del ciclo estral. Dado que la diferencia en la población folicular dentro y entre razas, es un factor a considerar en la biotecnología reproductiva, se considera que el nivel plasmático de HAM es una herramienta útil para seleccionar donantes de embriones. Con la finalidad de determinar la relación entre los niveles plasmáticos de HAM y la población folicular en hembras Brahman, se seleccionaron al azar 60 individuos entre 18 y 132 meses de edad, en el cantón Paján, provincia de Manabí, Ecuador. Se utilizó un diseño experimental completamente aleatorizado con arreglo factorial de los tratamientos. El factor A correspondió a la categoría del animal (vacas y vaquillas) y el factor B correspondió a los niveles de HAM (100-200; 200-300 y más de 300 pg.mL-1) con diez repeticiones. Se realizaron análisis estadístico descriptivo, análisis de varianza y ajustes de regresión. Se observó mayor número de folículos pequeños, grandes y totales a medida que aumentaron los niveles de HAM, los cuales fueron explicados a través de un ajuste cuadrático positivo, cuyo máximo fue alcanzado alrededor de 756 pg.mL-1. A partir de ese nivel ocurrió el descenso en la población de folículos. Los niveles plasmáticos de HAM representaron un indicador confiable de la población de folículos y un biomarcador para predecir el potencial reproductivo de la hembra Brahman.
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Derechos de autor 2019 Jorge Macias Andrade, Henry Vivanco Mackie, Ernesto A. Hurtado, Ángela Carreño Mendoza
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