Articles | Volume 59, issue 2
Arch. Anim. Breed., 59, 209–213, 2016
Arch. Anim. Breed., 59, 209–213, 2016

Original study 19 May 2016

Original study | 19 May 2016

Genetic parameters of reproductive traits in Tunisian Holsteins

Hafedh Ben Zaabza et al.

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Cited articles

Abe, H., Masuda, Y., and Suzuki, M.: Relationships between reproductive traits of heifers and cows and yield traits for Holstein in Japan, J. Dairy Sci., 92, 4055–4062, 2009.
Albarràn-Portillo, B. and Pollot, G. E.: The relationship between fertility and lactation characteristics in Holstein cows on United Kingdom commercial dairy farms, J. Dairy Sci., 96, 635–646, 2013.
Ben Gara, A., Rekik, B., and Bouallègue, M.: Genetic parameters and evaluation of the Tunisian dairy cattle population for milk yield by Bayesian and BLUP analyses, Livest. Prod. Science., 100, 142–149, 2006.
Campos, M. S., Wilcox, C. J., Becerril, C. M., and Diz, A.: Genetic Parameters for Yield and Reproductive Traits of Holstein and Jersey Cattle in Florida, J. Dairy Sci., 77, 867–873, 1994.
Djemali, M. and Berger, P. J.: Yield and reproduction characteristics of Friesian cattle under North African conditions, J. Dairy Sci., 75, 3568–3575, 1992.
Short summary
Genetic parameters for 11 456 Tunisian Holstein cows were estimated for the following five reproductive traits: calving interval (CI), calving to first service interval, calving to conception interval (CCI), first service to conception interval and number of services per conception. Low heritabilities were estimated for these traits, and genetic correlation estimates between them were moderately high. The CCI–CI genetic correlation was 0.85, indicating that they are the same trait genetically.