Statistic and genetic parameters of 205-day weaning weight of beef calves

Abstract

Abstract. The aim of the study was to do genetic evaluation of the 205-day weaning weight of pure bred herds of different beef cattle breeds kept in Hungary and supply results for genetic programmes of different breeds. Population genetic analysis was performed on data from 42695 purebred beef calves from seven breeds born from 1981 to 2005 in Hungary. Animal model was used for the estimations. Sire, herd, age of dam at calving, birth year, season of birth and sex of calf had significant effects on 205-day calf weaning weight for each breed. Significant breed differences and breed overlaps were found. Direct heritability value estimates were 0.18 to 0.61, the maternal heritability values from 0.07 to 0.38, and the total heritability values were between 0.09 and 0.35. The direct-maternal genetic correlations were high and negative for all the breeds varying from −0.63 to −0.88.

Estimation of genetic parameters for weaning and yearling weights in a composite population used to form the Purunã breed

“…Regarding age of dams at calving, previous studies have reported its significant linear and quadratic effects on WW (Santos et al, 2011;Szabó et al, 2012;Chud et al, 2014;Goldberg and Ravagnolo, 2015), corroborating the results found in the current study (P<0.01). In addition, Queiroz et al (2013) found significant linear and quadratic effects of age of dam on YW gain in a Brangus cattle population, showing the influence of this parameter on the performance of calves after the weaning period.…”

Genetic parameters and predictions for direct and maternal growth traits in a multibreed Angus–Brahman cattle population using genomic–polygenic and polygenic models

“…In addition, the similarity between variance components and genetic parameters from the polygenic model and genomic-polygenic model 2 indicated that genotypic and pedigree information from genotyped animals accounted for additive genetic (co)variability for growth traits to a similar extent. Estimates of variance components and genetic parameters for growth traits here were within the range of values obtained for B. taurus (Garrick et al, 1989;Meyer, 1992Meyer, , 1994Van Vleck et al, 1996;Dodenhoff et al, 1998;Elzo et al, , 2001Montaldo and Kinghorn, 2003;Szabó et al, 2012)), Bos indicus (Eler et al, 1995;Diop et al, 1999;Elzo et al, , 2001Montaldo and Kinghorn, 2003), and B. taurus  B. indicus cattle (Meyer, 1992;Elzo et al, , 2001Demeke et al, 2003;Vergara et al, 2009).…”

Breeding value of sires based on offspring weaning weight as a recommendation for selecting Kebumen Ongole Grade cattle

“…This result was higher than the weaning weight of several Indonesian native cattle are Bali 90.5±15.46,Sumba Ongole 113.67±25.24 kg, Brahman cross 107.13+19.25 kg and 44.68+11.00 kg for Aceh (Praharani, 2009;Kaswati et al, 2013;Putra et al, 2014). It was also lower than weaning weight of Charolais 229.10±12.73 kg, Hungarian Grey 191±5.05 kg, Hungarian Simmental 236±3.40 kg, Angus 212±3,61 kg, Hereford 204±5.06 kg, Blonde d'Aquitaine 242±7.95 kg, Limousin 203±2.99 kg, Angus-Nellore 247.74±5.63 and Simmental-Nellore 248.16±7.31 (Contreras et al, 2015;Szabó et al, 2012;Szabó et al, 2013 andÍtavo et al, 2014). The difference in the weaning weight was caused by the difference of the weaning ages and breeds.…”