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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
14/01/2019 |
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Data da última atualização: |
24/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
KERN, E. L.; COBUCI, J. A.; COSTA, C. N.; DUCROCQ, V. |
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Afiliação: |
Elisandra Lurdes Kern, UFRGS; Jaime Araujo Cobuci, UFRGS; CLAUDIO NAPOLIS COSTA, CNPGL; Vincent Ducrocq, French National Institute for Agricultural Research. |
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Título: |
Phenotypic relationships between type traits and productive life using a piecewise Weibull proportional hazard model. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Scientia Agricola, v. 75, n. 6, p. 470-478, 2018. |
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DOI: |
10.1590/1678-992X-2017-0153 |
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Idioma: |
Inglês |
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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 |
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Palavras-Chave: |
Conformation traits; Culling risk; Survival analysis. |
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Thesaurus Nal: |
Dairy cattle; Longevity. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190361/1/Artigo-SciAgricola-Claudio-Phenotypic.pdf
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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.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
16/10/2019 |
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Data da última atualização: |
09/12/2019 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
ALVES, S. A. M. |
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Afiliação: |
SILVIO ANDRE MEIRELLES ALVES, CNPUV. |
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Título: |
Aspectos da mancha foliar de glomerella em macieira. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Agapomi, n. 305, p. 8-9, out. 2019. |
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Idioma: |
Português |
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Conteúdo: |
A Mancha Foliar de Glomerella é uma doença que afeta a macieira durante o período de verão, principalmente os clones da cultivar Gala. Uma vez constatada a doença no pomar é de difícil controle devido a velocidade de desenvolvimento e a baixa eficiência dos fungicidas em atuar como curativos. Ademais, a planta pode comportar-se como extremamente suscetível e perder as folhas. A seguir são apresentadas as principais características dessa doença. |
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Palavras-Chave: |
Cultivar Gala; Macieira; Manejo de pomares de macieira. |
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Thesagro: |
Doença de Planta; Glomerella Cingulata; Maçã; Mancha Foliar. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/202969/1/Alves-Agapomi-n305-2019-P08-09.pdf
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Marc: |
LEADER 01006nam a2200193 a 4500
001 2113172
005 2019-12-09
008 2019 bl uuuu u00u1 u #d
100 1 $aALVES, S. A. M.
245 $aAspectos da mancha foliar de glomerella em macieira.$h[electronic resource]
260 $aAgapomi, n. 305, p. 8-9, out. 2019.$c2019
520 $aA Mancha Foliar de Glomerella é uma doença que afeta a macieira durante o período de verão, principalmente os clones da cultivar Gala. Uma vez constatada a doença no pomar é de difícil controle devido a velocidade de desenvolvimento e a baixa eficiência dos fungicidas em atuar como curativos. Ademais, a planta pode comportar-se como extremamente suscetível e perder as folhas. A seguir são apresentadas as principais características dessa doença.
650 $aDoença de Planta
650 $aGlomerella Cingulata
650 $aMaçã
650 $aMancha Foliar
653 $aCultivar Gala
653 $aMacieira
653 $aManejo de pomares de macieira
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Embrapa Uva e Vinho (CNPUV) |
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