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Volume 46, issue 3
Arch. Anim. Breed., 46, 235–243, 2003
https://doi.org/10.5194/aab-46-235-2003
© Author(s) 2003. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 46, 235–243, 2003
https://doi.org/10.5194/aab-46-235-2003
© Author(s) 2003. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Oct 2003

10 Oct 2003

Factors affecting actual weaning weight, preweaning average daily gain and relative growth rate in Asturiana de los Valles beef cattle breed

F. Goyache1, I. Fernández1, L. J. Royo1, I. Álvarez1, and J. P. Gutiérrez2 F. Goyache et al.
  • 1Área de Genética y reproducción Animal, C/ Camino de los Claveles 604, 33203 Gijón (Asturias), Spain
  • 2Dpto. de Produccion Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain

Abstract. In this paper we analyse the major environmental and genetic factors affecting actual weaning weight (WW), preweaning average daily gain (ADG) and relative growth rate (RGR) in a representative sample of field data of Asturiana de los Valles beef cattle breed. Major environmental factors affect preweaning growth performance of Asturiana de los Valles calves in the direction usually found in the literature. However RGR seems to be self-corrected for sex of calf and calving number. Heritabilities for the direct and maternal genetic effects were 0.67 and 0.29, 0.51 and 0.31 and 0.18 and 0.12 respectively for WW, ADG and RGR. The estimates of genetic parameters affecting RGR are more realistic than those estimated for the WW and ADG. Selection for RGR would lead to obtain higher growth rates and lower birth weights. RGR could be an interesting selection criterion in beef cattle improvement programs.

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