Carcass attributes in breeding objectives and selection criteria for british breeds in Uruguay

Authors

  • J. I. Urioste Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, Uruguay.
  • R. W. Ponzoni South Australian Research and Development Institute, GPO Box 397, Adelaide, SA, Australia 5001.
  • M. Aguirrezabala Asociación Rural del Uruguay, Av. Uruguay 867, Montevideo, Uruguay.
  • G. Rovere Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, Uruguay.
  • D. Saavedra Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, Uruguay.

DOI:

https://doi.org/10.31285/AGRO.07.1032

Keywords:

beff cattle, breeding objectives, selection indexes, carcass traits, British breeds

Abstract

This study considered the inclusion of carcass attributes in breeding objectives and selection criteria developed for pasture-fed Uruguayan production systems for beef cattle, based on British breeds. Correlated responses in dressing percentage (DP), eye rib area (ERA) and dorsal fat depth (DFD) were determined, when these traits are not formally included in the breeding objective. Addition of DP in the breeding objective, which also included growth, reproduction and feed intake traits, was studied. Genetic change in each trait when using selection indices that included growth (G), growth plus reproduction (GR) and growth plus reproduction plus carcass measures (GRC, where ERA and DFD were obtained by ultrasound techniques) was evaluated. The correlated response in carcass traits when they were not included in the breeding objective was insignificant or very small. When included in the breeding objective, DP showed the lowest economic-genetic importance in relation to other growth, reproduction and feed intake traits. Index GR showed a genetic gain of 94% over that produced by index G, whereas index GRC only showed a superiority of 16% over index GR. Carcass attributes are not expected to deteriorate, even when they were not included in the breeding objective. Inclusion of DP as the only carcass trait in the objective is of secondary importance in beef cattle selection.

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Published

2003-01-01

How to Cite

1.
Urioste JI, Ponzoni RW, Aguirrezabala M, Rovere G, Saavedra D. Carcass attributes in breeding objectives and selection criteria for british breeds in Uruguay. Agrocienc Urug [Internet]. 2003 Jan. 1 [cited 2023 Feb. 1];7(1):1-8. Available from: https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1032

Issue

Section

Animal production and pastures