Genetic Parameters for Cow-calve Phase in Hereford x Angus Crosses Under Extensive Grazing

Authors

  • Fernando Pereyra Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República (Udelar). 37003 Cerro Largo, Uruguay.
  • Jorge Ignacio Urioste Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Udelar. 12900 Montevideo, Uruguay.
  • Diego Gimeno Secretariado Uruguayo de la Lana.11900 Montevideo, Uruguay.
  • Francisco Peñagaricano Department of Animal Sciences, University of Wisconsin. Madison, 53706 WI, USA.
  • Dorrel Bentancur Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República (Udelar). 37003 Cerro Largo, Uruguay.
  • Ana Espasandín Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Udelar. 60000 Paysandú, Uruguay.

DOI:

https://doi.org/10.31285/AGRO.19.330

Keywords:

beef cattle, crossbreeding, direct effects, maternal effects, heterosis

Abstract

In a diallelic experiment between Hereford (H/H) and Aberdeen Angus (A/A) breed, developed between 1994 and 2002 at the Bernardo Rosengurtt Experimental Station (College of Agriculture-University of the Republic, Uruguay) individual (giA-giH) and maternal (gmA-gmH) breed differences, individual (hiAH) and maternal (hmAH) heterosis were estimated, using linear models for body condition at calving (BCC), birth weight (BW), and weaning weight (WW), and generalized linear models for weaning percentage (% W). Racial and estimated heterosis effects were not significant for BCC, while for BW the difference in kg was negative, and H/H was superior (-1.18 ± 0.42 kg, P = 0.0051). For WW, the difference between maternal effects (gmA - gmH) was positive, with 4.87 ± 1.01 kg (P <0.0001), and individual heterosis was 5.12 ± 1.24 kg (P <0.0001). The hiAH for % W was 0.22 ± 0.03. The hmAH was significant for WW (11.58 ± 1.48 kg, P=0.0001). At birth, calves H/H, A/H and H/A were heavier than A/A. For % W, crossbred dams averaged 24.7 points (14.9 %) higher than pure breeds (85.0 vs. 60.3). Crossbred breed dams weaned calves significantly heavier (means 159.1 kg). Hereford dams weaned significantly lighter calves (means 143.3kg); while the calves of Angus dams weighed 151.6 kg.

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Published

2015-06-01

How to Cite

1.
Pereyra F, Urioste JI, Gimeno D, Peñagaricano F, Bentancur D, Espasandín A. Genetic Parameters for Cow-calve Phase in Hereford x Angus Crosses Under Extensive Grazing. Agrocienc Urug [Internet]. 2015 Jun. 1 [cited 2024 Apr. 24];19(1):140-9. Available from: https://agrocienciauruguay.uy/index.php/agrociencia/article/view/330

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Section

Animal production and pastures
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