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Doctoral Thesis
DOI
https://doi.org/10.11606/T.11.2018.tde-03012018-130038
Document
Author
Full name
Mirian Fernandes Carvalho Araújo
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 2017
Supervisor
Committee
Dias, Carlos Tadeu dos Santos (President)
Medeiros, Simone Daniela Sartorio de
Pião, Antonio Carlos Simões
Piedade, Sonia Maria de Stefano
Sermarini, Renata Alcarde
Title in Portuguese
Interação tripla genótipos × locais × anos: um teste estatístico para verificar a contribuição de cada fator
Keywords in Portuguese
Contribuição de genótipos,locais e anos
Interação G×L×A
Teste F modificado
Abstract in Portuguese
O presente trabalho teve por objetivos propor um método alternativo para testar a contribuição de cada genótipo, local e ano para a interação genótipos × locais × anos por meio de um teste F, em dados provenientes de experimentos agronômicos e implementar uma rotina computacional para a realização da análise de dados, mediante a contribuição de cada genótipo, local e ano para a interação. O estudo avalia treze genótipos e nove ambientes (combinação de três locais e três anos). Simulou-se as somas de quadrados das fatias horizontais (genótipos), verticais (locais) e frontais (anos) do arranjo de três entradas de interação genótipos × locais × anos (G×L×A) gerando 500, 1000 e 5000 experimentos para verificar a distribuição empírica. Os resultados indicaram um ajuste à distribuição qui-quadrado não-central para as fatias horizontais, verticais e frontais do arranjo de três entradas de interação G×L×A, verificados também pelo teste de Kolmogorov-Smirnov e o gráfico QQplot. Na aplicação do teste F proposto, identificou-se os genótipos, locais e anos que contribuem mais para a interação genótipos × locais × anos, sendo de fácil aplicação e interpretação.
Title in English
Triple interaction genotypes × locations × years studies: A statistical test for factor contribution analysis
Keywords in English
Factor contribution
G×L×A interaction
Modified F test
Abstract in English
The present study objectives is to demonstrate an alternative method for test factor con- tribution on a triple interaction system segregating environment effects (locations × years) and genotypes effect. The analysis consists of two parts: (1) a F test, applied in agronomical experiments for means calculation; and (2) the implementation of a computer routine for simulating experiments and check results with the proposed method. The triple interaction (genotypes × locations × years) was studied in thirteen genotypes and nine environments (a combination of three locations and three years), in a block design with three repetitions. The sum of squares within horizontal slices (genotypes), vertical slices (locations) and frontal slices (years) of three way array the genotypes × locations × years (G×L×A) were simulated, generating 500, 1000 and 5000 experiments to test the empirical distribution. The results indicates a non-central chi-squared distribution for horizontal, vertical and frontal slices in the three way array G×L×A, also was tested using the Kolmogorov-Smirnov test and QQplot plot. The application of F test identified the genotypes, locations and years showing the relative contribution of these factors for the triple interaction (genotypes × locations × years), getting an easy routine and fast interpretation method.
 
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Publishing Date
2018-01-17
 
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