Avaliação do desempenho ao primeiro parto de fêmeas Nelore e F1

Pelicioni, Luciele Cristina; Muniz, Carolina Amália de Souza Dantas; Queiroz, Salete Linhares

doi:10.1590/s1516-35981999000400011

Cited by 7 publications

(7 citation statements)

References 3 publications

(2 reference statements)

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“…Our AFC mean agrees with those reported by Pelicioni et al (1999) 2000) and Bertazzo et al (2004), studying Nelore cattle in the state of São Paulo, Brazil reported means of 41.7, 38.3 ± 3.5 and 38.7 ± 4.5 months, respectively, and for another zebu breed, Lôbo (1998) calculated a mean of 59 ± 16.4 months for the same trait. Smaller means are recorded European cattle (Frazier et al, 1999;Pelicioni et al, 1999) and in Nelore herds where dams had been prematurely exposed to sires (Pereira et al, 2002;Dias et al, 2004;Silva et al, 2005).…”

Section: Resultssupporting

confidence: 91%

See 1 more Smart Citation

Genetic associations between accumulated productivity, and reproductive and growth traits in Nelore cattle

Grossi

Frizzas

Paz³

et al. 2008

Livestock Science

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Section: Resultssupporting

confidence: 91%

“…Smaller means are recorded European cattle (Frazier et al, 1999;Pelicioni et al, 1999) and in Nelore herds where dams had been prematurely exposed to sires (Pereira et al, 2002;Dias et al, 2004;Silva et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

Genetic associations between accumulated productivity, and reproductive and growth traits in Nelore cattle

Grossi

Frizzas

Paz³

et al. 2008

Livestock Science

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“…A precocidade da raça Brangus em comparação à Nelore também foi observada por Pelicioni et al (1999), que compararam a idade ao primeiro parto de fêmeas Nelore e F1 de várias raças com Nelore, entre elas a Brangus, e observaram menor idade para os animais cruzados. A menor idade ao primeiro parto foi para os animais cruzados Nelore x Angus, seguidos pelo Nelore x Brangus.…”

Section: Coeficiente De Determinação (Coefficient Of Determination)unclassified

Exigências líquidas de proteína e energia para ganho de peso de tourinhos Brangus e Nelore alimentados com dietas contendo diferentes proporções de concentrado

Putrino¹,

Leme²,

Silva³

et al. 2006

R. Bras. Zootec.

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RESUMO -Foram estimadas as exigências de energia e proteína para ganho de peso de tourinhos das raças Brangus e Nelore, por meio da técnica de abate comparativo, pela estimativa da composição química do corpo vazio a partir do corte da 9 a -10 a -11 a costelas. Foram utilizados 28 animais (28 meses de idade) de cada raça, sendo quatro foram abatidos no início do período experimental, para estimativa da composição corporal inicial, e os demais, alimentados sem restrição por 145 dias com dietas contendo 20, 40, 60 ou 80% de concentrado na matéria seca. Os pesos médios iniciais e finais foram de 238 e 402 kg para os Brangus e 230,7 e 361,9 kg para os Nelore, respectivamente. Os ganhos diários de peso vivo em jejum, peso de corpo vazio e peso de carcaça quente foram diferentes entre as raças e os níveis de concentrado, com maiores médias para os animais Brangus e para o nível de 60% de concentrado na dieta. Os animais Brangus apresentaram maiores valores de extrato etéreo e energia e os Nelore, maiores teores de água, proteína e cinzas no corpo vazio. As exigências líquidas de proteína e de energia para o ganho de peso vazio foram diferentes entre raças, com valores de 0,161 e 0,188 kg de proteína e 3,02 e 2,46 Mcal por kg de ganho de peso vazio para os animais Brangus e Nelore, respectivamente. Os animais da raça Brangus tiveram maior exigência de energia e os Nelore, maior exigência de proteína, mas não houve efeito do nível de concentrado na dieta, provavelmente em razão da pouca idade dos animais, que não haviam alcançado a fase de maior deposição de gordura.Palavras-chave: bovinos de corte, composição corporal, confinamento, crescimento, maturidade Net energy and protein requirements for weight gain of Brangus and Nellore bulls fed diets containing different concentrate proportionsABSTRACT -The energy and protein requirements for gain of Brangus and Nellore bulls were estimated using the comparative slaughter technique, in which the empty body as well as the gain composition were estimated through the 9 th -10 th -11 th rib cut. Twenty-eight animals from each breed were used in this research. At the beginning of the trial four animals from each breed were slaughtered to determine the initial body composition while the remaining bulls had free access to diets containing 20, 40, 60 or 80% of concentrate (dry matter basis) during 145 days. The average initial and final shrunk body weights were 238 and 402 kg for Brangus and 230.7 and 361.9 kg for Nellore, respectively. Animals averaged eight months of age in the beginning of the trial. The final average shrunk body gain, empty body gain, and hot carcass gain differed between breeds and concentrate levels with greater values found for Brangus and 60% of dietary concentrate, respectively. Fat and energy contents in the empty body were greater for Brangus while water, protein, and ash were higher for Nellore bulls. Protein and energy requirements for empty weight gain differed between breeds averaging 0.161 and 0.188 kg of protein and 3.02 and 2.46 Mcal of energy per...

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“…The highest price paid for F from the BX genetic group is related to its final destination for this category, since they are mainly acquired for replacement of cows, as the British breeds and their crosses with zebu breeds are considered to have fertility precocity and maternal ability compared with continental races (Pelicioni et al, 1999). In addition, the study area has a transition tendency to commercialized British breeds as breeding cows; this may be the reason that producers pay more for F compared with M calves.…”

Section: Resultsmentioning

confidence: 99%

Factors affecting the selling prices of calves in auctions in Santa Catarina State, Brazil

et al. 2016

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-The objective of this study was to investigate the effects of genetic group and calf sex on selling prices in auctions in the state of Santa Catarina (SC), Brazil. We evaluated 33,143 animals, representing 3,587 lots in 47 auctions from 2009 to 2014. The calves were classified according to genetic groups: British breed or crossbreed (BX); Continental breed or crossbreed (CX); Zebu breed or crossbreed (ZC); British and Continental crossbreed (BC); and Bos taurus and Bos indicus crossbreed (TI). The lots were composed of male and female calves. The years presenting low and high changes in the price of calves were similar to the variation in the price of beef cattle and, in 2014, the calf price reached its highest value (R$5.36). Male calves were sold at prices higher than female calves (average 7.8%), but this difference was driven by year of analysis, in which the closest approach occurred during periods of reduction in the price of live cattle in SC (2012 and 2013). Calves of genetic groups ZX and TI received, on average, lower prices (R$4.49 and R$4.64, respectively) compared with the other groups. In 2013, males from the BX group had greater variation in price compared with CX (3.9%) and BC (5.7%). On the other hand, female heifers from the BX group received higher average prices in 2011 compared with the CX, BC, IT, and ZX groups (8.1, 8.5, 14.7, and 16.5%, respectively). Recently, female British heifers have had a greater appreciation in auctions held in SC, possibly for their reproductive performance potential of beef cows. Thus, sex and different genetic groups are factors that impact the selling price of calves in the SC region.

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Avaliação do desempenho ao primeiro parto de fêmeas Nelore e F1

Cited by 7 publications

References 3 publications

Genetic associations between accumulated productivity, and reproductive and growth traits in Nelore cattle

Genetic associations between accumulated productivity, and reproductive and growth traits in Nelore cattle

Exigências líquidas de proteína e energia para ganho de peso de tourinhos Brangus e Nelore alimentados com dietas contendo diferentes proporções de concentrado

Factors affecting the selling prices of calves in auctions in Santa Catarina State, Brazil

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