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

  • 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
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

González-Stagnaro, C. 2001. Parámetros, cálculos e índices aplicados a la evaluación de la eficiencia reproductiva. En: González Stagnaro, C (Ed.). Reproducción Bovina. Fundación GIRARZ. Ediciones Astro Data S.A. Maracaibo, Venezuela. Cap. XIV, pp. 203-247. ISBN 980-296-826-0
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Perea Ganchou, F., C. González Stagnaro. 2005. Factores que afectan la fertilidad. En: González Stagnaro, C.; Soto Belloso, E. (Eds.). Manual de Ganadería Doble Propósito. Fundación GIRARZ. Ediciones Astro Data S.A. 6(13), pp. 471-477. ISBN 980-6863-00-3
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Published
2022-10-19
How to Cite
Perea Ganchou, Fernando Pedro, Eleazar Soto-Belloso, Daniel A. Perdomo, Mariana S. Perea, Roberto A. Palomares, Juan C. Gutiérrez, and Hugo Hernández-Fonseca. 2022. “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”. Latin American Archives of Animal Production 30 (Supl. 2), 79-82. https://doi.org/10.53588/alpa.300613.