&lt;b&gt;Performance in preweaning pure and crossbred calves in the Mato Grosso do Sul Pantanal region, Aquidauana, Mato Grosso do Sul State, Brazil

Fialho, Fabio Rafael Leão; Rezende, Marcos Paulo Gonçalves de; Souza, Júlio César de; Silva, Rosana Moreira da; Oliveira, N. M. de; Silveira, Maurício

doi:10.4025/actascianimsci.v37i4.28345

Cited by 11 publications

(12 citation statements)

References 24 publications

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“…In the current study, sex had a significant effect on WW and YW traits (P<0.01). Schiermiester et al (2015) also reported a significant sex effect on these traits in a composite population represented by purebred Angus, Hereford, Red Angus, Charolais, Gelbvieh, Simmental, Limousin, and Composite MARC III (1/4 Angus, 1/4 Hereford , 1/4 Pinzgauer, 1/4 Red Poll), corroborating the results found by Alencar et al (2009) and Fialho et al (2015), who evaluated crossbred animals created by crossing Angus × Nelore and Simmental × Nelore cows and Angus, Bonsmara, and Canchim bulls; and purebred and crossbred calves derived from Nellore, Brangus, Wagyu, and ½ Brangus × ½ Nellore cows, crossed with bulls of the Aberdeen Angus, Red Angus, Brangus, Nellore, and Wagyu breeds, respectively.…”

Section: Discussionsupporting

confidence: 86%

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

Otto¹,

Santos²,

Perotto³

et al. 2021

Revista Brasileira De Zootecnia

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We aimed to evaluate the effects of sex and the linear and quadratic components of age of dam at calving, as well as apply a mixed model including maternal effect for the genetic evaluation of weaning (WW) and yearling (YW) weights. The phenotypic database was composed by Charolais, Caracu, Aberdeen Angus, and Canchim purebred and crossbred animals. Single-trait analyses were performed using models that included the maternal effect for WW and YW traits, and a model ignoring this effect on YW (YWNM). The Deviance Information Criterion (DIC), model posterior probabilities (MPP), accuracy of breeding values (ACC), and Spearman's rank correlation were applied to compare the models including and ignoring the maternal effect on YW. Sex and age of dam at calving had significant effects on WW and YW. The direct heritability estimates were 0.21±0.03 and 0.05±0.02, and the maternal heritabilities were 0.11±0.02 and 0.02±0.01 for WW and YW, respectively. The heritabilities estimated for YW may have been influenced by the several genetic groups in the population and by used conventional animal model, which may not have been the better fit model to evaluate YW in this population. The DIC, MPP, and ACC values indicated that YW outperformed the YWNM model, but the rank correlation and percentages of individuals selected in common suggested that the best animals would be selected independently of the model chosen.

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Section: Discussionsupporting

confidence: 86%

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

Otto¹,

Santos²,

Perotto³

et al. 2021

Revista Brasileira De Zootecnia

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“…Comparison with other breeds yielded a similar result in the study of Ribeiro et al (2009), who analyzed data for Nelore animals, and observed an average of 198.77 kg. Guimarães et al (2003) and Fialho et al (2015) evaluated the weight at 205 days for Tabapuã and Nelore animals, respectively, and obtained lower values (170.35 and 175.59 kg) than in this study. However, it should be emphasized that animals of zebuine origin have, in general, lower average values in relation to animals that present taurine breeds in their genetic composition, as in the case for Santa Gertrudis.…”

Section: Resultscontrasting

confidence: 67%

“…However, lower average values were obtained by Lopes et al (2009) with an ADG of 0.701 kg day -1 for Brangus animals. Fialho et al (2015) observed an ADG of 0.650 and 0.700 kg day -1 for Nelore and Brangus, respectively.…”

Section: Traitsmentioning

confidence: 86%

“…The animals of the Santa Gertrudis breed averaged 218.05 ± 18.67 days to gain 160 kg from birth to weaning, a time shorter than that found by Gemin et al (2004) of an average of 285 days for Guzerá animals. Santos et al (2011), Pereira and Muniz (2013), Ferreira et al (2014), and Fialho et al (2015) analyzed data from Nellore animals and found averages of 237, 306, 233, and 248 days, respectively. Thus, the Santa Gertrudis breed in this study gained 160 kg from birth to weaning in a shorter period of time.…”

Section: Traitsmentioning

confidence: 99%

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Environmental effects on pre-weaning traits in Santa Gertrudis cattle

Marestone¹,

Muniz²,

Ribeiro³

et al. 2019

SCA

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We aimed to evaluate environmental effects on pre-weaning traits of Santa Gertrudis cattle. We used 213 standardized records for adjusted 205-day weight at weaning (W205), average daily gain from birth to weaning (AGD), and number of days to gain 160 kg from birth to weaning (D160), obtained from the Santa Gertrudis Breeders' Association for animals born between 1990 and 1997. The files were edited with information regarding cow age at calving (CAC) and contemporary group (CG), for which the effects of year and season of birth, animal category, herd, and sex were considered. It was observed that cow age at calving, which had linear and quadratic effects, and effect of contemporary group were significant (P < 0.0001) for the evaluated traits. Estimated averages were 198.05 ± 40.64 kg, 0.790 ± 0.198 kg day-1, and 288.05 ± 67.18 days for W205, ADG, and D160, respectively. Males were 4.67 kg heavier (197.17 kg) than females, on average. Regarding the animal category effect, the classified females were 2.3% heavier than the unclassified, on average. On average, animals born in the dry season were 1.6% lighter than those born in the rainy season (197.18 kg). Thus, environmental effects are important and should be considered in any analysis model.

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“…However, the expression of this quantitative phenotypic characteristic is not only due to its genes, but also influenced by month of birth, the cow's gestational age, the calf's weaning age, the matrix's maturity weight, the mother's racial composition, the calf's sex, and correlations between these variables (Castro-Pereira, Alencar, & Barbosa, 2007;Bocchi, Oliveira, Ferraz, & Eler, 2008;Queiroz, Costa, Oliveira, & Fries, 2009;Barichello, Alencar, Torres Jr., & Silva, 2011;Fialho et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

<b>How the calving order of cows affects the performance of Nellore calves

Silveira

Jangarelli

2017

Acta Sci. Anim. Sci.

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ABSTRACT. This study aimed to verify the effect of age of dam on the performance of male and female Nellore calves, using the following variables: average daily gain (ADG), adjusted weight for 205 days of age (W205), and number of days to reach 160 kg (D160). Information were collected from a commercial herd consisting of 1,122 calves and 1,009 heifers and their mothers. To classify animals with similar performance based on the cows' calving orders (age of dam), the multivariate cluster analysis was adopted through the complete linkage hierarchical method. The best performance was observed in the calves of cows in their sixth calving at most; for heifers, the best performance was seen in those born to cows in their eighth calving at most. Cows in their eighth calving should be discarded.Keywords: average daily gain, cluster analysis, cow age, number of days to reach 160 kg, weaning weight.Ordem de parto da matriz sobre o desempenho de bezerros da raça Nelore RESUMO. Objetivou-se com este estudo verificar o efeito da idade da vaca sobre o desempenho de bezerros e bezerras da raça Nelore, utilizando-se as variáveis ganho médio diário (GMD), peso ajustado para os 205 dias de idade (P205) e o número de dias para atingir 160 kg (D160). Foram coletadas informações de um rebanho comercial composto por 1.122 bezerros e 1.009 bezerras e suas respectivas mães. Para classificar os animais com desempenhos similares em função das ordens de parto (idade) das vacas, utilizou-se a análise multivariada de agrupamento, por meio do método hierárquico de ligação completa. O melhor desempenho é observado em bezerros filhos das vacas de até sexto parto. Para as bezerras o maior desempenho é verificado em filhas das matrizes de até oito partos. Vacas de no máximo oito partos devem ser descartadas.Palavras-chave: análise de agrupamento, ganho médio diário, idade da vaca, número de dias para atingir 160 kg, peso ao desmame.

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<b>Performance in preweaning pure and crossbred calves in the Mato Grosso do Sul Pantanal region, Aquidauana, Mato Grosso do Sul State, Brazil

Cited by 11 publications

References 24 publications

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

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

Environmental effects on pre-weaning traits in Santa Gertrudis cattle

<b>How the calving order of cows affects the performance of Nellore calves

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