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| Registros recuperados : 307 | |
| Registros recuperados : 307 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
27/11/2015 |
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Data da última atualização: |
25/07/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
RODRIGUES, W. B.; WECHSLER, F. S.; NOGUEIRA, E. |
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Afiliação: |
UNESP; UNESP; ERIKLIS NOGUEIRA, CPAP. |
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Título: |
Reproductive performance and reconception of Nellore cows according to their pure- or cross-bred calves. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Reproduction in Domestic Animals, v. 50, n. 3, p. 431-436, 2015. |
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DOI: |
10.1111/rda.12509. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of the present research was to evaluate the effect of a calf?s genetic group on the productive and reproductive efficiency of its Nellore dam. Fixed-time artificial insemination was applied to 800 cows using semen extracted from Nellore, Simmental and Angus Red bulls. Four hundred eleven cows calved, producing 119 Nellore, 103 ½Simmental?½Nellore and 189 ½Nellore?½Angus Red calves. The second mating period, which paired Nellore cows with Simmental bulls, was initiated 10 days after parturitions began and lasted for 5 months. Based on the two successive parturitions, the cumulative parturition rate for calving periods of 3, 4 and 5 months was calculated. Although no significant difference was observed for birth weight among the genetic groups, cross-bred calves weighed, on average, 10% more than did pure-bred calves at the age of 205 days. Nellore dams experienced a gestation period that was 7 days longer than did the cross-bred dams, and the former showed a higher parturition rate at 90 and 120 days of the calving season, but not at 150 days (calving rates of 80.6, 76.4 and 76.2% for mothers of Nellore, ½Nellore?½Angus Red and ½Nellore?½Simmental, respectively, p > 0.05). At 90 and 120 days, Nellore dams produced more kg of calf per mated dam. In conclusion, in a short breeding season, Nellore dams nursing pure-bred Nellore calves were found to have a higher biological efficiency compared with Nellore dams nursing cross-bred calves. |
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Palavras-Chave: |
Calf. |
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Thesaurus NAL: |
Nellore; reproduction. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/134175/1/reproductive-performance-versao-early-view-03-2015.pdf
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Marc: |
LEADER 02050naa a2200193 a 4500
001 2029804
005 2017-07-25
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1111/rda.12509.$2DOI
100 1 $aRODRIGUES, W. B.
245 $aReproductive performance and reconception of Nellore cows according to their pure- or cross-bred calves.
260 $c2015
520 $aThe objective of the present research was to evaluate the effect of a calf?s genetic group on the productive and reproductive efficiency of its Nellore dam. Fixed-time artificial insemination was applied to 800 cows using semen extracted from Nellore, Simmental and Angus Red bulls. Four hundred eleven cows calved, producing 119 Nellore, 103 ½Simmental?½Nellore and 189 ½Nellore?½Angus Red calves. The second mating period, which paired Nellore cows with Simmental bulls, was initiated 10 days after parturitions began and lasted for 5 months. Based on the two successive parturitions, the cumulative parturition rate for calving periods of 3, 4 and 5 months was calculated. Although no significant difference was observed for birth weight among the genetic groups, cross-bred calves weighed, on average, 10% more than did pure-bred calves at the age of 205 days. Nellore dams experienced a gestation period that was 7 days longer than did the cross-bred dams, and the former showed a higher parturition rate at 90 and 120 days of the calving season, but not at 150 days (calving rates of 80.6, 76.4 and 76.2% for mothers of Nellore, ½Nellore?½Angus Red and ½Nellore?½Simmental, respectively, p > 0.05). At 90 and 120 days, Nellore dams produced more kg of calf per mated dam. In conclusion, in a short breeding season, Nellore dams nursing pure-bred Nellore calves were found to have a higher biological efficiency compared with Nellore dams nursing cross-bred calves.
650 $aNellore
650 $areproduction
653 $aCalf
700 1 $aWECHSLER, F. S.
700 1 $aNOGUEIRA, E.
773 $tReproduction in Domestic Animals$gv. 50, n. 3, p. 431-436, 2015.
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Embrapa Pantanal (CPAP) |
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