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 | Acesso ao texto completo restrito à biblioteca da Biblioteca Rui Tendinha. Para informações adicionais entre em contato com biblioteca@incaper.es.gov.br. |
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Registro Completo |
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Biblioteca(s): |
Biblioteca Rui Tendinha. |
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Data corrente: |
07/01/2015 |
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Data da última atualização: |
07/01/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FONSECA, A. F. A. da.; SEDIYAMA, T.; CRUZ, C. D.; SAKIYAMA, N. S.; FERRÃO, R. G.; FERRÃO, M. A. G.; BRAGANÇA, S. M. |
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Afiliação: |
Aymbiré Francisco Almeida da Fonseca, Incaper/Embrapa Café; Romário Gava Ferrão, Incaper; Maria Amélia Gava Ferrão, Incaper/Embrapa Café; Scheilla Marina Bragança, Incaper. |
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Título: |
Repeatability and number of harvests required for selection in robusta coffee. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Crop Breeding in Applied Biotechnology, Viçosa, MG, v. 4, n. 3, p. 325-329, Sept. 2004 |
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DOI: |
10.12702/1984-7033.v04n03a10 |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to estimate the repeatability coefficient of the grain yield in Coffea canephora by three methods: to quantify the precision of the measurements; to predict the real value of an individual based on n evaluations; and to determine the number of phenotypic measures required in each plant to obtain an adequate precision level for an efficient discrimination of the genotypes. The coefficients of repeatability and determination were estimated based on four harvests of 80 genotypes. Highest estimates of the repeatability coefficient were obtained by the method of the principal components derived from the matrix of covariances, which expresses the correlation between each measurement pair. The prediction precision of the real individual value ranged from 65.32 to 81.59%, and remained practically unchanged from the sixth harvest on.
Este trabalho objetivou estimar o coeficiente de repetibilidade da produção de grãos em Coffea canephora, por três métodos, visando quantificar a precisão das medidas, predizer o valor real do indivíduo com base em n avaliações e determinar o número de medidas fenotípicas que devem ser tomadas em cada indivíduo para que se obtenha o nível de precisão adequado na discriminação eficiente de genótipos. Os coeficientes de repetibilidade e de determinação foram estimados com base em quatro colheitas de 80 genótipos. As maiores estimativas do coeficiente de repetibilidade foram obtidas pelo método dos componentes principais obtidos da matriz de covariâncias, que considera a correlação entre cada par de medições. A precisão na predição do valor real dos indivíduos variou de 65,32 a 81,59%, e tornou-se praticamente inalterada a partir da sexta colheita. MenosThis study aimed to estimate the repeatability coefficient of the grain yield in Coffea canephora by three methods: to quantify the precision of the measurements; to predict the real value of an individual based on n evaluations; and to determine the number of phenotypic measures required in each plant to obtain an adequate precision level for an efficient discrimination of the genotypes. The coefficients of repeatability and determination were estimated based on four harvests of 80 genotypes. Highest estimates of the repeatability coefficient were obtained by the method of the principal components derived from the matrix of covariances, which expresses the correlation between each measurement pair. The prediction precision of the real individual value ranged from 65.32 to 81.59%, and remained practically unchanged from the sixth harvest on.
Este trabalho objetivou estimar o coeficiente de repetibilidade da produção de grãos em Coffea canephora, por três métodos, visando quantificar a precisão das medidas, predizer o valor real do indivíduo com base em n avaliações e determinar o número de medidas fenotípicas que devem ser tomadas em cada indivíduo para que se obtenha o nível de precisão adequado na discriminação eficiente de genótipos. Os coeficientes de repetibilidade e de determinação foram estimados com base em quatro colheitas de 80 genótipos. As maiores estimativas do coeficiente de repetibilidade foram obtidas pelo método dos componentes principais obtidos da matriz d... Mostrar Tudo |
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Thesaurus NAL: |
Coffea canephora; Genetic improvement; Repeatability; Robusta coffee. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02528naa a2200253 a 4500
001 1004804
005 2015-01-07
008 2004 bl uuuu u00u1 u #d
024 7 $a10.12702/1984-7033.v04n03a10$2DOI
100 1 $aFONSECA, A. F. A. da.
245 $aRepeatability and number of harvests required for selection in robusta coffee.$h[electronic resource]
260 $c2004
520 $aThis study aimed to estimate the repeatability coefficient of the grain yield in Coffea canephora by three methods: to quantify the precision of the measurements; to predict the real value of an individual based on n evaluations; and to determine the number of phenotypic measures required in each plant to obtain an adequate precision level for an efficient discrimination of the genotypes. The coefficients of repeatability and determination were estimated based on four harvests of 80 genotypes. Highest estimates of the repeatability coefficient were obtained by the method of the principal components derived from the matrix of covariances, which expresses the correlation between each measurement pair. The prediction precision of the real individual value ranged from 65.32 to 81.59%, and remained practically unchanged from the sixth harvest on. Este trabalho objetivou estimar o coeficiente de repetibilidade da produção de grãos em Coffea canephora, por três métodos, visando quantificar a precisão das medidas, predizer o valor real do indivíduo com base em n avaliações e determinar o número de medidas fenotípicas que devem ser tomadas em cada indivíduo para que se obtenha o nível de precisão adequado na discriminação eficiente de genótipos. Os coeficientes de repetibilidade e de determinação foram estimados com base em quatro colheitas de 80 genótipos. As maiores estimativas do coeficiente de repetibilidade foram obtidas pelo método dos componentes principais obtidos da matriz de covariâncias, que considera a correlação entre cada par de medições. A precisão na predição do valor real dos indivíduos variou de 65,32 a 81,59%, e tornou-se praticamente inalterada a partir da sexta colheita.
650 $aCoffea canephora
650 $aGenetic improvement
650 $aRepeatability
650 $aRobusta coffee
700 1 $aSEDIYAMA, T.
700 1 $aCRUZ, C. D.
700 1 $aSAKIYAMA, N. S.
700 1 $aFERRÃO, R. G.
700 1 $aFERRÃO, M. A. G.
700 1 $aBRAGANÇA, S. M.
773 $tCrop Breeding in Applied Biotechnology, Viçosa, MG$gv. 4, n. 3, p. 325-329, Sept. 2004
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Registro original: |
Biblioteca Rui Tendinha (BRT) |
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| Acesso ao texto completo restrito à biblioteca da Biblioteca Rui Tendinha. Para informações adicionais entre em contato com biblioteca@incaper.es.gov.br. |
|
Registro Completo |
|
Biblioteca(s): |
Biblioteca Rui Tendinha. |
|
Data corrente: |
08/01/2014 |
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Data da última atualização: |
01/09/2015 |
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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: |
MARTINS, D. dos S.; VENTURA, J. A.; LIMA, R. de C. A.; CULIK, M. P.; COSTA, H.; FERREIRA, P. S. F. |
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Afiliação: |
David dos Santos Martins, Incaper; Jose Aires Ventura, Incaper; Rita de Cássia Antunes Lima, CNPq/Incaper; Mark Paul Culik, CNPQ; Helcio Costa, Incaper; Paulo Sérgio Fiuza Ferreira, UFV. |
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Título: |
Interaction between Papaya meleira virus (PMeV) infection of papaya plants and Mediterranean fruit fly infestation of fruits. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Crop Protection, vol. 36, p. 7-10, 2012. |
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Páginas: |
4p. |
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DOI: |
10.1016/j.cropro.2012.01.001 |
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Idioma: |
Inglês |
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Conteúdo: |
The Mediterranean fruit fly (Medfly), Ceratitis capitata (Wied.), is a pest of quarantine importance that usually only infests papaya fruits in advanced stages of maturity. However, some diseases, such as sticky disease of papaya plants, caused by the Papaya meleira virus (PMeV), break the natural resistance of fruits to fruit flies, enabling them to be infested while still unripe. Therefore, this study of the relationship of papaya sticky disease with C. capitata under field conditions was conducted to determine the period of security to guarantee the harvest of papaya fruits free of fruit flies in areas where sticky disease is endemic. Infestation of papaya fruits by C. capitata was evaluated from uninfected plants and from sticky disease infected plants, in seven stages of the disease and three stages of ripening of fruits. A direct relationship was observed between time of sticky disease symptoms and infestation of fruits by the Medfly, and it was determined that a period of four weeks after the first appearance of the symptoms of sticky disease in papaya plants was the period of security in which infestation of fruits by fruit flies did not occur. Infection of papaya plants with sticky disease was associated with a reduced level of benzyl-isothiocyanate (BITC), from 43.1 ?g ml?1 to 1.7 ?g ml?1, a natural chemical compound in the latex of papaya fruit, and considered to be associated with resistance to fruit flies. |
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Thesaurus NAL: |
Benzyl-isothiocyanate (BITC); Carica papaya; Ceratitis capitata; Medfly; Virus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02239naa a2200265 a 4500
001 1001435
005 2015-09-01
008 2012 bl --- 0-- u #d
024 7 $a10.1016/j.cropro.2012.01.001$2DOI
100 1 $aMARTINS, D. dos S.
245 $aInteraction between Papaya meleira virus (PMeV) infection of papaya plants and Mediterranean fruit fly infestation of fruits.$h[electronic resource]
260 $c2012
300 $a4p.
520 $aThe Mediterranean fruit fly (Medfly), Ceratitis capitata (Wied.), is a pest of quarantine importance that usually only infests papaya fruits in advanced stages of maturity. However, some diseases, such as sticky disease of papaya plants, caused by the Papaya meleira virus (PMeV), break the natural resistance of fruits to fruit flies, enabling them to be infested while still unripe. Therefore, this study of the relationship of papaya sticky disease with C. capitata under field conditions was conducted to determine the period of security to guarantee the harvest of papaya fruits free of fruit flies in areas where sticky disease is endemic. Infestation of papaya fruits by C. capitata was evaluated from uninfected plants and from sticky disease infected plants, in seven stages of the disease and three stages of ripening of fruits. A direct relationship was observed between time of sticky disease symptoms and infestation of fruits by the Medfly, and it was determined that a period of four weeks after the first appearance of the symptoms of sticky disease in papaya plants was the period of security in which infestation of fruits by fruit flies did not occur. Infection of papaya plants with sticky disease was associated with a reduced level of benzyl-isothiocyanate (BITC), from 43.1 ?g ml?1 to 1.7 ?g ml?1, a natural chemical compound in the latex of papaya fruit, and considered to be associated with resistance to fruit flies.
650 $aBenzyl-isothiocyanate (BITC)
650 $aCarica papaya
650 $aCeratitis capitata
650 $aMedfly
650 $aVirus
700 1 $aVENTURA, J. A.
700 1 $aLIMA, R. de C. A.
700 1 $aCULIK, M. P.
700 1 $aCOSTA, H.
700 1 $aFERREIRA, P. S. F.
773 $tCrop Protection, vol. 36, p. 7-10, 2012.
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