Parâmetros genéticos para diferentes relações de peso ao nascer e à desmama em vacas da raça Nelore

Boligon, Arione Augusti; Sala, Victor Eduardo; Mercadante, Maria Eugênia Zerlotti; Ribeiro, Enílson Geraldo; Cyrillo, Joslaine Noely dos Santos Gonçalves; Albuquerque, Lúcia Galvão de

doi:10.1590/s0103-84782013005000019

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…The means obtained for these traits were similar to those previously reported for Nellore cattle (Boligon et al, 2008(Boligon et al, , 2013Pedrosa et al, 2014a).…”

Section: Resultssupporting

confidence: 88%

Inclusion of cytoplasmic lineage effect and direct-maternal genetic covariance for genetic evaluation of growth traits in Nellore cattle

et al. 2016

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ABSTRACT.We evaluated the impact of cytoplasmic lineage effects (Lc) for growth traits on genetic evaluation, including the genetic covariance between direct and maternal effects (s am ). Pedigree data from 496,190 Nellore animals and observations on birth weight (BW, N = 243,391), weaning weight (WW, N = 431,681), and post-weaning weight gain adjusted to 345 days (PWG, N = 172,131) were analyzed. Four univariate models were used to obtain estimates of (co)variance components using the restricted maximum likelihood method in the BLUPF90 program. Model 1 included Lc and s am . Model 2 included Lc and s am was set to zero. Model 3 did not include Lc. Model 4 did not include Lc and s am was set to zero. These models considered the effects of the Lc as random. Phenotypic variance obtained through cytoplasmic lineage effects was determined for all traits, ranging from 0.07 to 0.15, 0.15 to 0.03, and 0.05 to 0.03% for BW, WW, and PWG, respectively, for models 1 and 2. Correlations between direct and maternal genetic components were positive for WW and negative for BW and PWG. No differences were observed for genetic parameter estimates or animal ranking with the inclusion of s am . For BW, the likelihood ratio suggested that model 1 best fits the data, while model 4 was the most appropriate for WW and PWG. Thus, these models are recommended for genetic evaluations. Despite the low magnitude of cytoplasmic lineages, this effect could predict breeding value and improve the selection of animals for BW in this Nellore population.

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“…The means obtained for these traits were similar to those previously reported for Nellore cattle (Boligon et al, 2008(Boligon et al, , 2013Pedrosa et al, 2014a).…”

Section: Resultssupporting

confidence: 88%

Inclusion of cytoplasmic lineage effect and direct-maternal genetic covariance for genetic evaluation of growth traits in Nellore cattle

et al. 2016

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“…However, when calf weight was expressed relative to the cow weight, similar values were found: 8.8, 8.6, and 8.1% for the light, moderate, and heavy groups, respectively. Boligon et al (2013) mentioned that calves are heavier at birth when their mothers have larger biotypes. However, those authors also stressed the increased probability of occurrence of dystocia, claiming that in cows with a body weight of 400 to 450 kg, the birth weight of their offspring should be around 35 kg, on average.…”

Section: Resultsmentioning

confidence: 99%

<b>Body size and its effects on productive efficiency of cows with predominant Nellore genetic composition

Farias

Cerdótes

Restle

et al. 2018

Acta Sci. Anim. Sci.

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This study was developed to evaluate productive efficiency during the lactation period of cows with predominant Nellore genetic composition based on their body size. Cows were divided into the following categories: light (≤ 316 kg), moderate (≥ 317 and ≤ 400 kg), or heavy (≥ 401 kg). Body weight change and total gain from birth to 210 days of age of calves born from heavy cows (0.155±0.03 and 111.6±5.1 kg) were higher than those of calves born from light (0.064±0.03 and 91.0±4.3 kg) and moderate (0.144±0.03 and 97.7±4.0 kg) cows. Calf production index differed (p < 0.05) with the herd of heavy cows (93.5±3.2 kg), producing 57.4 and 19.7% more kilograms of calf than light (59.4±2.7 kg) and moderate (78.1±2.4 kg) cows, respectively. Heavy Nellore cows produce heavier calves and have a better reproductive performance, which lead to a better calf production index. However, they require a larger area for the same herbage allowance. Calves born from heavier Nellore cows gain more weight from birth to 210 days of age and are heavier from 210 to 270 days of age.

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“…Na escolha de bovinos de corte são levados em consideração como critério de seleção, com maior relevância, características de produção, bem como pesos atingidos em idades distintas, como, por exemplo, peso ao nascer e peso a desmama (Boligon et al, 2013). Essas medidas são de obtenção acessível, expondo correlações favoráveis com diversas características de desejo econômico, ademais de responderem à seleção individual, apresentando herdabilidade mediana.…”

Section: Falta Do Controle De Peso Ao Nascer E Peso a Desmamaunclassified

Diagnosis of beef cattle in the municipality of Acrelândia, Acre: case study

Diniz¹,

Diniz²,

Reis³

2020

Pubvet

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Objetivou-se verificar e descrever os principais pontos fracos apresentados por um sistema de produção de bovinos de corte e organizar os aspectos relevantes que devem ser alterados para o aumento da produtividade pelas ferramentas de gestão. Os dados coletados são resultados de uma propriedade, localizada em Acrelândia, Acre, no período de junho de 2019, sendo coletados a partir de um formulário semiestruturado, contendo 152 questões. As respostas foram obtidas por meio da observação, bem como por entrevista com o proprietário. Utilizando-se a matriz GUT, os principais pontos fracos encontrados, em ordem decrescente: animais doentes juntos aos sadios, ausência de controle do peso ao nascer e a desmama e escolha visual dos touros. Frente a análise dos fatores apresentados, torna-se favorável a aplicação de métodos de planejamento em curto prazo, permitindo maior eficiência econômica e produtiva de modo geral.Palavras chave: Ferramentas de gestão, pecuária de corte, matriz GUT, planejamento Diagnosis of beef cattle in the municipality of Acrelândia, Acre: case study

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Parâmetros genéticos para diferentes relações de peso ao nascer e à desmama em vacas da raça Nelore

Cited by 6 publications

References 8 publications

Inclusion of cytoplasmic lineage effect and direct-maternal genetic covariance for genetic evaluation of growth traits in Nellore cattle

Inclusion of cytoplasmic lineage effect and direct-maternal genetic covariance for genetic evaluation of growth traits in Nellore cattle

<b>Body size and its effects on productive efficiency of cows with predominant Nellore genetic composition

Diagnosis of beef cattle in the municipality of Acrelândia, Acre: case study

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