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Revista de la Facultad de Ciencias Veterinarias
versión impresa ISSN 0258-6576
Resumen
VERDE, Omar. Beef Cattle Production System at La Cumaca Experimental Station II.- Weaning Weight. Rev. Fac. Cienc. Vet. [online]. 2007, vol.48, n.2, pp.105-110. ISSN 0258-6576.
In this second article, the character adjusted to age 205 days, was the evaluated in a registered Brahman herd located at La Cumaca Alí Benavides Zapata Experimental Station, in State of Yaracuy, Venezuela. A total of 4715 weights measured at 205 days were analized using mixed models techniques (including an Animal Model). The following variables were studied: sex, year and month of birth, age of dam, and sire and dam effects. The results of the present investigation show overall average weight of 158.6 ± 0.76 kg. All effects were significant (p<0.01), yielding an annual phenotipic trend of 100 g, a direct genetic trend of 236 g, and a maternal trend one of 178g, correspondingly. The direct and maternal heritability indexes were 0.11 and 0.24, respectively. Cows produced heavier calves from first to fourth parturition, declining from there
Palabras clave : Beef cattle; Brahman; animal husbandry methods; weaning weight; sex; animal models; Yaracuy.