Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/915561
Research center of Embrapa/Collection: Embrapa Meio Ambiente - Artigo em anais de congresso (ALICE)
Date Issued: 2011
Type of Material: Artigo em anais de congresso (ALICE)
Authors: MAIA, A. de H. N.
DEL PONTE, E. M.
GODOY, C. V.
Additional Information: ALINE DE HOLANDA NUNES MAIA, CNPMA; EMERSON MEDEIROS DEL PONTE, UFRGS; CLAUDIA VIEIRA GODOY, CNPSO.
Title: Heterogeneidade da relação entre produtividade da soja e severidade da ferrugem asiática: uma análise exploratória.
Publisher: In: ESCOLA DE MODELOS DE REGRESSÃO, 12., 2011, Fortaleza. Anais... Fortaleza: Universidade Federal do Ceará, Departamento de Estatística e Matemática Aplicada, 2011. 1 CD ROM.
Language: pt_BR
Keywords: Linear model
Influence analysis
Between-trials heterogeneity
Ferrugem asiática
Description: This work aimed to conduct an exploratory, prior to meta-analysis, assessment of the heterogeneity of the linear relationship between soybean yield (Y) and the severity (X) of a foliar fungal disease (soybean rust) from 144 fungicide trials conducted in five years and 45 locations in Brazil. We used graphical analysis to explore the within- and between-trial variability of model parameter estimates (effect sizes) and summary measures for model goodness-of-fit and influence analysis. In the estimation of the weighted mean regression coefficients, following the metaanalysis concept, we propose a method that takes into account the magnitude of influence measures as well as the uncertainties of parameters estimates, usually the inverse of the standard error of for the parameter estimate. High between-trial heterogeneity was observed for parameter estimates, standard errors (within trial variability), determination coefficient and influence measures. Graphical analysis suggested influence of timing of disease onset and control yield class on model slope, which will be quantified further using a meta-analytical approach.
Thesagro: Doença de planta
Soja
Ferrugem
Análise estatística
Regressão linear
Data Created: 2012-02-15
Appears in Collections:Artigo em anais de congresso (CNPMA)

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