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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
07/10/1998 |
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Data da última atualização: |
07/10/1998 |
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Autoria: |
EUCLIDES FILHO, K.; FIGUEIREDO, G. R.; SILVA, L. O. C.; ALVES, R. G. O. |
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Afiliação: |
EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande, MS). |
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Título: |
Beef cattle preweaning growth and rate of weight gain as affected by genetic group. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
In: WORLD CONGRESS ON GENETIC APPLIED TO LIVESTOCK PRODUCTION, 6., 1998, Armidale. Proceeding... Armidale: Organazing Committee, 1998. |
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Volume: |
v.23. |
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Páginas: |
p.197-200. |
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Idioma: |
Inglês |
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Notas: |
CNPGC. |
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Conteúdo: |
New demands imposed by consumer and mainly by socioeconomic changes am exerting new pressures on beef cattle production systems in Brazil. These forces result in new challenges which are related to improvement of the efficiency of production and reduction of age at first calving, as well as the slaughter age. Closely related to these parameters are: the need for increasing weight and rate of weight gain. This experiment was carried out using information from Nellore and croossbred animals from six genetic groups formed by mating Simental, Chianina and Charolais bulls with Nellore cows, and Nellore bulls with 1/2 Simental 1/2 Nellore, 1/2 Chianina 1/2 Nellore and 1/2 Charolais 1/2 Nellore cows. The traits analyzed were preweaning gain and days necessary to reach 165 kg of liveweight. With respect to sire breed it was observed that those breeds with heavier mature weight or higher weigltt gain produced calves that gained weight faster (P<.05). Thus, progenies from Charolais bulls had the higher preweanmg gains (680 g/day), followed by those sired by Simental and Chianina (650 and 640 g/day), which were not different from each other (P>.05), and finally, the calves sired by Nellore bulls (600g/day). As far as breed of dam is concerned, the higher the milk production potential and/or the higher the mature weight, the higher was the preweaning weight gain (P<.05). Calves from Simental-Nellore and Charolais-Nellore F1 cows were those that gained faster (670 and 680 g/day), while those ou of Nellore and 1/2 Chianina -1/2 Nellore cows were the lightest. With respect to age at 165 kg of liveweight it was observed that larger paternal breeds were those wich reached 165 kg most rapidly (P<.05). As far as maternal breed is concerned, progeny out of 1/2 Simental-1/2 Nellore were the youngest at 165 kg of liveweight, and those out of Nellore cows were the oldest (P<.05). MenosNew demands imposed by consumer and mainly by socioeconomic changes am exerting new pressures on beef cattle production systems in Brazil. These forces result in new challenges which are related to improvement of the efficiency of production and reduction of age at first calving, as well as the slaughter age. Closely related to these parameters are: the need for increasing weight and rate of weight gain. This experiment was carried out using information from Nellore and croossbred animals from six genetic groups formed by mating Simental, Chianina and Charolais bulls with Nellore cows, and Nellore bulls with 1/2 Simental 1/2 Nellore, 1/2 Chianina 1/2 Nellore and 1/2 Charolais 1/2 Nellore cows. The traits analyzed were preweaning gain and days necessary to reach 165 kg of liveweight. With respect to sire breed it was observed that those breeds with heavier mature weight or higher weigltt gain produced calves that gained weight faster (P<.05). Thus, progenies from Charolais bulls had the higher preweanmg gains (680 g/day), followed by those sired by Simental and Chianina (650 and 640 g/day), which were not different from each other (P>.05), and finally, the calves sired by Nellore bulls (600g/day). As far as breed of dam is concerned, the higher the milk production potential and/or the higher the mature weight, the higher was the preweaning weight gain (P<.05). Calves from Simental-Nellore and Charolais-Nellore F1 cows were those that gained faster (670 and 680 g/day), whi... Mostrar Tudo |
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Palavras-Chave: |
Bovino de corte; Brasil; Brazilian; Charoles; Growing; Mato Grosso do Sul; Simental. |
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Thesagro: |
Cerrado; Crescimento; Cruzamento; Desmama; Ganho de Peso; Melhoramento. |
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Thesaurus Nal: |
beef cattle; Brazil; breeding; Charolais; Chianina; crossbreds; Nellore; savannas; Simmental; weaning; weight gain. |
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Categoria do assunto: |
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Marc: |
LEADER 03160naa a2200481 a 4500
001 1318211
005 1998-10-07
008 1998 bl uuuu u00u1 u #d
100 1 $aEUCLIDES FILHO, K.
245 $aBeef cattle preweaning growth and rate of weight gain as affected by genetic group.
260 $c1998
300 $ap.197-200. v.23.
490 $vv.23.
500 $aCNPGC.
520 $aNew demands imposed by consumer and mainly by socioeconomic changes am exerting new pressures on beef cattle production systems in Brazil. These forces result in new challenges which are related to improvement of the efficiency of production and reduction of age at first calving, as well as the slaughter age. Closely related to these parameters are: the need for increasing weight and rate of weight gain. This experiment was carried out using information from Nellore and croossbred animals from six genetic groups formed by mating Simental, Chianina and Charolais bulls with Nellore cows, and Nellore bulls with 1/2 Simental 1/2 Nellore, 1/2 Chianina 1/2 Nellore and 1/2 Charolais 1/2 Nellore cows. The traits analyzed were preweaning gain and days necessary to reach 165 kg of liveweight. With respect to sire breed it was observed that those breeds with heavier mature weight or higher weigltt gain produced calves that gained weight faster (P<.05). Thus, progenies from Charolais bulls had the higher preweanmg gains (680 g/day), followed by those sired by Simental and Chianina (650 and 640 g/day), which were not different from each other (P>.05), and finally, the calves sired by Nellore bulls (600g/day). As far as breed of dam is concerned, the higher the milk production potential and/or the higher the mature weight, the higher was the preweaning weight gain (P<.05). Calves from Simental-Nellore and Charolais-Nellore F1 cows were those that gained faster (670 and 680 g/day), while those ou of Nellore and 1/2 Chianina -1/2 Nellore cows were the lightest. With respect to age at 165 kg of liveweight it was observed that larger paternal breeds were those wich reached 165 kg most rapidly (P<.05). As far as maternal breed is concerned, progeny out of 1/2 Simental-1/2 Nellore were the youngest at 165 kg of liveweight, and those out of Nellore cows were the oldest (P<.05).
650 $abeef cattle
650 $aBrazil
650 $abreeding
650 $aCharolais
650 $aChianina
650 $acrossbreds
650 $aNellore
650 $asavannas
650 $aSimmental
650 $aweaning
650 $aweight gain
650 $aCerrado
650 $aCrescimento
650 $aCruzamento
650 $aDesmama
650 $aGanho de Peso
650 $aMelhoramento
653 $aBovino de corte
653 $aBrasil
653 $aBrazilian
653 $aCharoles
653 $aGrowing
653 $aMato Grosso do Sul
653 $aSimental
700 1 $aFIGUEIREDO, G. R.
700 1 $aSILVA, L. O. C.
700 1 $aALVES, R. G. O.
773 $tIn: WORLD CONGRESS ON GENETIC APPLIED TO LIVESTOCK PRODUCTION, 6., 1998, Armidale. Proceeding... Armidale: Organazing Committee, 1998.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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