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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
20/12/2012 |
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Data da última atualização: |
09/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, M. V. G. B.; VAN TASSELL, C. P.; SONSTEGARD, T. S.; COBUCI, J. A.; GASBARRE, L. C. |
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Afiliação: |
MARCOS VINICIUS GUALBERTO B SILVA, CNPGL; CURTIS P. VAN TASSELL; TAD S. SONSTEGARD; JAIME ARAUJO COBUCI, UFRGS; LOUIS C. GASBARRE. |
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Título: |
Box-cox transformation and random regression models for fecal egg count data. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Frontiers in Genetics, v. 2, article 112, 2012. |
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DOI: |
https://doi.org/10.3389/fgene.2011.00112 |
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Idioma: |
Inglês |
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Conteúdo: |
Accurate genetic evaluation of livestock is based on appropriate modeling of phenotypic measurements. In ruminants, fecal egg count (FEC) is commonly used to measure resistance to nematodes. FEC values are not normally distributed and logarithmic transformations have been used in an effort to achieve normality before analysis. However, the transformed data are often still not normally distributed, especially when data are extremely skewed. A series of repeated FEC measurements may provide information about the population dynamics of a group or individual. A total of 6375 FEC measures were obtained for 410 animals between 1992 and 2003 from the Beltsville Agricultural Research Center Angus herd. Original data were transformed using an extension of the Box-Cox transformation to approach normality and to estimate (co)variance components. We also proposed using random regression models (RRM) for genetic and non-genetic studies of FEC. Phenotypes were analyzed using RRM and restricted maximum likelihood. Within the different orders of Legendre polynomials used, those with more parameters (order 4) adjusted FEC data best. Results indicated that the transformation of FEC data utilizing the Box-Cox transformation family was effective in reducing the skewness and kurtosis, and dramatically increased estimates of heritability, and measurements of FEC obtained in the period between 12 and 26 weeks in a 26-week experimental challenge period are genetically correlated. |
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Palavras-Chave: |
Bovine; Box-cox transformation; Genetic parameters; REML. |
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Thesaurus Nal: |
fecal egg count. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02199naa a2200241 a 4500
001 1943307
005 2024-02-09
008 2012 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3389/fgene.2011.00112$2DOI
100 1 $aSILVA, M. V. G. B.
245 $aBox-cox transformation and random regression models for fecal egg count data.$h[electronic resource]
260 $c2012
520 $aAccurate genetic evaluation of livestock is based on appropriate modeling of phenotypic measurements. In ruminants, fecal egg count (FEC) is commonly used to measure resistance to nematodes. FEC values are not normally distributed and logarithmic transformations have been used in an effort to achieve normality before analysis. However, the transformed data are often still not normally distributed, especially when data are extremely skewed. A series of repeated FEC measurements may provide information about the population dynamics of a group or individual. A total of 6375 FEC measures were obtained for 410 animals between 1992 and 2003 from the Beltsville Agricultural Research Center Angus herd. Original data were transformed using an extension of the Box-Cox transformation to approach normality and to estimate (co)variance components. We also proposed using random regression models (RRM) for genetic and non-genetic studies of FEC. Phenotypes were analyzed using RRM and restricted maximum likelihood. Within the different orders of Legendre polynomials used, those with more parameters (order 4) adjusted FEC data best. Results indicated that the transformation of FEC data utilizing the Box-Cox transformation family was effective in reducing the skewness and kurtosis, and dramatically increased estimates of heritability, and measurements of FEC obtained in the period between 12 and 26 weeks in a 26-week experimental challenge period are genetically correlated.
650 $afecal egg count
653 $aBovine
653 $aBox-cox transformation
653 $aGenetic parameters
653 $aREML
700 1 $aVAN TASSELL, C. P.
700 1 $aSONSTEGARD, T. S.
700 1 $aCOBUCI, J. A.
700 1 $aGASBARRE, L. C.
773 $tFrontiers in Genetics$gv. 2, article 112, 2012.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
17/10/2008 |
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Data da última atualização: |
15/04/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
WREGE, M. S.; HIGA, R. C. V.; BRITEZ, R. M.; SOUSA, V. A. de; CARAMORI, P. H.; BRAGA, H. J.; RADIN, B. |
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Afiliação: |
Marcos Silveira Wrege, Embrapa Florestas; Rosana Clara Victoria Higa, Embrapa Florestas; Ricardo Miranda Britez, SPVS; Valderês Aparecida de Sousa, Embrapa Florestas; Paulo Henrique Caramori, IAPAR; Hugo José Braga, EPAGRI/CIRAM; Bernadete Radin, FEPAGRO. |
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Título: |
Climate change and Araucaria angustifolia Bert. O. Ktze conservation strategy. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: IUFRO INTERNATIONAL CONFERENCE ON ADAPTATION OF FORESTS AND FOREST MANAGEMENT TO CHANGING CLIMATE WITH EMPHASIS ON FOREST HEALTH: A REVIEW OF SCIENCE, POLICIES AND PRACTICES, 2008, Umea. Book of abstracts and preliminary programme. [S.l.]: SLU: FAO: IUFRO, 2008. p. 231. |
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Idioma: |
Inglês |
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Conteúdo: |
Araucaria angustifolia, known as Parana pine, sets the boundary of the Ombrophylous Mixed Forest. Natural occurrence is above 500 m on the Brazilian Southern tableland and it has been related to climatic fluctuation during the Quaternary. The species was intensively exploited for timber use and due to the expansion of the area for agricultural use. The bioma conservation status is considered critical and only a restricted area is left on an advanced successional stage. The majority of the remaining area is under considerable pressure because it is located on the most populated areas. Besides human pressure, the species is also threatened by recent global climate change. It is a threat to some protected sites that can be decimated in a nearby future. The aim of this work is to point out areas threatened by climate change to support araucaria conservation programs. Using 30 years climatic series with multiple linear regression maps were drawn with 1.C, 2.C and 3.C temperature increased over the natural distribution map. Latitude, longitude and elevation were use as independent variables to establish temperature suitable zones. These are preliminary results and show a significant decrease on what is nowadays favorable for the species development. With an increase of 3.C in temperature, the favourable area will be confined to a small part of the highest part of Southern Tableland. More climate variables will be used to improve maps future limits and to give priority for germplasm collection and conservation. MenosAraucaria angustifolia, known as Parana pine, sets the boundary of the Ombrophylous Mixed Forest. Natural occurrence is above 500 m on the Brazilian Southern tableland and it has been related to climatic fluctuation during the Quaternary. The species was intensively exploited for timber use and due to the expansion of the area for agricultural use. The bioma conservation status is considered critical and only a restricted area is left on an advanced successional stage. The majority of the remaining area is under considerable pressure because it is located on the most populated areas. Besides human pressure, the species is also threatened by recent global climate change. It is a threat to some protected sites that can be decimated in a nearby future. The aim of this work is to point out areas threatened by climate change to support araucaria conservation programs. Using 30 years climatic series with multiple linear regression maps were drawn with 1.C, 2.C and 3.C temperature increased over the natural distribution map. Latitude, longitude and elevation were use as independent variables to establish temperature suitable zones. These are preliminary results and show a significant decrease on what is nowadays favorable for the species development. With an increase of 3.C in temperature, the favourable area will be confined to a small part of the highest part of Southern Tableland. More climate variables will be used to improve maps future limits and to give priority for germplas... Mostrar Tudo |
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Palavras-Chave: |
Atlantic rain forest; Conservation; Floresta Ombrófila Mista. |
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Thesagro: |
Conservação; Mudança Climática. |
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Thesaurus NAL: |
climate change. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/195861/1/2008-RAC-Wrege-ICAFFM-Climate.pdf
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Marc: |
LEADER 02497nam a2200253 a 4500
001 1315149
005 2019-04-15
008 2008 bl uuuu u00u1 u #d
100 1 $aWREGE, M. S.
245 $aClimate change and Araucaria angustifolia Bert. O. Ktze conservation strategy.$h[electronic resource]
260 $aIn: IUFRO INTERNATIONAL CONFERENCE ON ADAPTATION OF FORESTS AND FOREST MANAGEMENT TO CHANGING CLIMATE WITH EMPHASIS ON FOREST HEALTH: A REVIEW OF SCIENCE, POLICIES AND PRACTICES, 2008, Umea. Book of abstracts and preliminary programme. [S.l.]: SLU: FAO: IUFRO, 2008. p. 231.$c2008
520 $aAraucaria angustifolia, known as Parana pine, sets the boundary of the Ombrophylous Mixed Forest. Natural occurrence is above 500 m on the Brazilian Southern tableland and it has been related to climatic fluctuation during the Quaternary. The species was intensively exploited for timber use and due to the expansion of the area for agricultural use. The bioma conservation status is considered critical and only a restricted area is left on an advanced successional stage. The majority of the remaining area is under considerable pressure because it is located on the most populated areas. Besides human pressure, the species is also threatened by recent global climate change. It is a threat to some protected sites that can be decimated in a nearby future. The aim of this work is to point out areas threatened by climate change to support araucaria conservation programs. Using 30 years climatic series with multiple linear regression maps were drawn with 1.C, 2.C and 3.C temperature increased over the natural distribution map. Latitude, longitude and elevation were use as independent variables to establish temperature suitable zones. These are preliminary results and show a significant decrease on what is nowadays favorable for the species development. With an increase of 3.C in temperature, the favourable area will be confined to a small part of the highest part of Southern Tableland. More climate variables will be used to improve maps future limits and to give priority for germplasm collection and conservation.
650 $aclimate change
650 $aConservação
650 $aMudança Climática
653 $aAtlantic rain forest
653 $aConservation
653 $aFloresta Ombrófila Mista
700 1 $aHIGA, R. C. V.
700 1 $aBRITEZ, R. M.
700 1 $aSOUSA, V. A. de
700 1 $aCARAMORI, P. H.
700 1 $aBRAGA, H. J.
700 1 $aRADIN, B.
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