| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
14/01/2019 |
|
Data da última atualização: |
24/01/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
KERN, E. L.; COBUCI, J. A.; COSTA, C. N.; DUCROCQ, V. |
|
Afiliação: |
Elisandra Lurdes Kern, UFRGS; Jaime Araujo Cobuci, UFRGS; CLAUDIO NAPOLIS COSTA, CNPGL; Vincent Ducrocq, French National Institute for Agricultural Research. |
|
Título: |
Phenotypic relationships between type traits and productive life using a piecewise Weibull proportional hazard model. |
|
Ano de publicação: |
2018 |
|
Fonte/Imprenta: |
Scientia Agricola, v. 75, n. 6, p. 470-478, 2018. |
|
DOI: |
10.1590/1678-992X-2017-0153 |
|
Idioma: |
Inglês |
|
Conteúdo: |
ABSTRACT: Longevity is an important trait due to its relationship with profitability. Type traits have been used as indirect predictors for productive life. The objective of this study was to evaluate the relationship of 20 type traits on length of productive life in Brazilian Holsteins, using a piecewise Weibull proportional hazard model. Three analyses were performed i) productive life was corrected for within herd level of production as a proxy for functional longevity, which included the time-dependent effects of region within year, class of milk production within herdyear, milk production class within lactation number, fat class and protein contents within herd and (variation in) herd size as well as the time-independent fixed effect of age at first calving and the type trait score; ii) the effects related to production were omitted from the first model (true longevity) and iii) with the first model, the effect of type was also studied considering five classes of percentage of type-scored cows within the herd. All analyses were performed using the Survival Kit program. The final score, angularity, top line, udder texture and suspensory ligament showed the strongest relationship with productive life. When type traits were available only for a small fraction of the herd, the cows had a better chance of remaining longer in the herd. The absence of type trait phenotypes was associated with a strong increase of culling risk for the cows. Type traits were not found to be good indirect predictors of productive life in Brazil. MenosABSTRACT: Longevity is an important trait due to its relationship with profitability. Type traits have been used as indirect predictors for productive life. The objective of this study was to evaluate the relationship of 20 type traits on length of productive life in Brazilian Holsteins, using a piecewise Weibull proportional hazard model. Three analyses were performed i) productive life was corrected for within herd level of production as a proxy for functional longevity, which included the time-dependent effects of region within year, class of milk production within herdyear, milk production class within lactation number, fat class and protein contents within herd and (variation in) herd size as well as the time-independent fixed effect of age at first calving and the type trait score; ii) the effects related to production were omitted from the first model (true longevity) and iii) with the first model, the effect of type was also studied considering five classes of percentage of type-scored cows within the herd. All analyses were performed using the Survival Kit program. The final score, angularity, top line, udder texture and suspensory ligament showed the strongest relationship with productive life. When type traits were available only for a small fraction of the herd, the cows had a better chance of remaining longer in the herd. The absence of type trait phenotypes was associated with a strong increase of culling risk for the cows. Type traits were not found to be good... Mostrar Tudo |
|
Palavras-Chave: |
Conformation traits; Culling risk; Survival analysis. |
|
Thesaurus Nal: |
Dairy cattle; Longevity. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190361/1/Artigo-SciAgricola-Claudio-Phenotypic.pdf
|
|
Marc: |
LEADER 02250naa a2200229 a 4500
001 2103810
005 2023-01-24
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1590/1678-992X-2017-0153$2DOI
100 1 $aKERN, E. L.
245 $aPhenotypic relationships between type traits and productive life using a piecewise Weibull proportional hazard model.$h[electronic resource]
260 $c2018
520 $aABSTRACT: Longevity is an important trait due to its relationship with profitability. Type traits have been used as indirect predictors for productive life. The objective of this study was to evaluate the relationship of 20 type traits on length of productive life in Brazilian Holsteins, using a piecewise Weibull proportional hazard model. Three analyses were performed i) productive life was corrected for within herd level of production as a proxy for functional longevity, which included the time-dependent effects of region within year, class of milk production within herdyear, milk production class within lactation number, fat class and protein contents within herd and (variation in) herd size as well as the time-independent fixed effect of age at first calving and the type trait score; ii) the effects related to production were omitted from the first model (true longevity) and iii) with the first model, the effect of type was also studied considering five classes of percentage of type-scored cows within the herd. All analyses were performed using the Survival Kit program. The final score, angularity, top line, udder texture and suspensory ligament showed the strongest relationship with productive life. When type traits were available only for a small fraction of the herd, the cows had a better chance of remaining longer in the herd. The absence of type trait phenotypes was associated with a strong increase of culling risk for the cows. Type traits were not found to be good indirect predictors of productive life in Brazil.
650 $aDairy cattle
650 $aLongevity
653 $aConformation traits
653 $aCulling risk
653 $aSurvival analysis
700 1 $aCOBUCI, J. A.
700 1 $aCOSTA, C. N.
700 1 $aDUCROCQ, V.
773 $tScientia Agricola$gv. 75, n. 6, p. 470-478, 2018.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
14/07/1999 |
|
Data da última atualização: |
14/07/1999 |
|
Autoria: |
JUNQUEIRA, N. T. V. |
|
Título: |
Cultivo de outras especies frutiferas de potencial para o Distrito Federal. |
|
Ano de publicação: |
1998 |
|
Fonte/Imprenta: |
In: INCENTIVO a fruticultura no Distrito Federal: manual de fruticultura. Brasilia: OCDF / COOLABORA, 1998. |
|
Páginas: |
p.81-83. |
|
Idioma: |
Português |
|
Palavras-Chave: |
Brasil; Cultivation; Cultivo; Distrito Federal; Marmeleiro; Producao potencial; Production possibilities. |
|
Thesagro: |
Carica Papaya; Caryocar Brasiliense; Cerrado; Ficus Carica; Figo; Fruta; Hancornia Speciosa; Mamão; Mangaba; Pequi; Pêssego; Prunus Persica. |
|
Thesaurus NAL: |
Brazil; figs; papayas; peaches. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01046naa a2200397 a 4500
001 1545391
005 1999-07-14
008 1998 bl uuuu u00u1 u #d
100 1 $aJUNQUEIRA, N. T. V.
245 $aCultivo de outras especies frutiferas de potencial para o Distrito Federal.
260 $c1998
300 $ap.81-83.
650 $aBrazil
650 $afigs
650 $apapayas
650 $apeaches
650 $aCarica Papaya
650 $aCaryocar Brasiliense
650 $aCerrado
650 $aFicus Carica
650 $aFigo
650 $aFruta
650 $aHancornia Speciosa
650 $aMamão
650 $aMangaba
650 $aPequi
650 $aPêssego
650 $aPrunus Persica
653 $aBrasil
653 $aCultivation
653 $aCultivo
653 $aDistrito Federal
653 $aMarmeleiro
653 $aProducao potencial
653 $aProduction possibilities
773 $tIn: INCENTIVO a fruticultura no Distrito Federal: manual de fruticultura. Brasilia: OCDF / COOLABORA, 1998.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
