Tasa de fertilidad al primer servicio en vacas resultantes del cruce alterno entre Brahman Rojo y Holstein Rojo de acuerdo con el predominio racial, la generación (madres e hijas) y a la época de parto

Fernando Pedro Perea Ganchou; Eleazar Soto-Belloso; Daniel A. Perdomo; Mariana S. Perea; Roberto A. Palomares; Juan C. Gutiérrez; Hugo Hernández-Fonseca

doi:10.53588/alpa.300613

Fernando Pedro Perea Ganchou Universidad de Los Andes Venezuela https://orcid.org/0000-0001-8301-6339
Eleazar Soto-Belloso Facultad de Ciencias Veterinarias, Universidad del Zulia
Daniel A. Perdomo Departamento de Ciencias Agrarias, Universidad de Los Andes
Mariana S. Perea Práctica privada
Roberto A. Palomares College of Veterinary Medicine, University of Georgia
Juan C. Gutiérrez Facultad de Ciencias Veterinarias, Universidad del Zulia https://orcid.org/0000-0002-3827-1186
Hugo Hernández-Fonseca School of Veterinary Medicine, Saint George’s University https://orcid.org/0000-0001-5572-2084

DOI: https://doi.org/10.53588/alpa.300613

Keywords: fertility rate, reproductive efficiency, Dry season, crossbred cows

Abstract

The fertility rate at 1st service (FPS) is the percentage relationship between the cows that become pregnant at the 1st service and those that are served for the first time, and constitutes an important reproductive index that allows evaluating the reproductive efficiency of the herd (González-Stagnaro, 2001). The effect of racial predominance and season on FPS in tropical mestizo cows was previously described (Perea et al., 2005; Perea and González-Stagnaro, 2005). In Bos indicus predominant cows, FPS is higher than in Bos taurus predominant cows (Perea et al., 2006). The dry season favors a higher FPS in both genetic groups (Perea et al., 2006). Considering a population of mestizo cows subject to alternate crossbreeding between the Red Holstein and Red Brahman breeds, the objective of this study was to evaluate the FPS in predominantly Brahman or Holstein mothers and daughters according to three calving seasons in the year.

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References

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First service conception rate in cows resulting from alternating crossbreeding between Brahman Red and Holstein Red according to breed predominance, generation (dams and daughters), and calving season

Abstract

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