análise da repetibilidade em alguns descritores morfológicos para soja analysis of the repeatability in some morphologic descriptors to soybean

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ID: 138183
2012
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Abstract
Estudos envolvendo descritores adicionais têm sido de importância para o melhoramento genético de soja. Por isso, neste trabalho, objetivou-se estimar o coeficiente de repetibilidade do comprimento do hipocótilo, do epicótilo, do internódio entre o nó das folhas unifolioladas e da primeira folha trifoliolada, do pecíolo e da raque da primeira folha trifoliolada e determinar o número mínimo de avaliações necessário para predizer o valor real dos genótipos. O trabalho foi desenvolvido na Universidade Federal de Viçosa, analisando-se 85 genótipos de soja em quatro experimentos, no delineamento inteiramente casualizado. A partir das estimativas dos coeficientes de repetibilidade e de determinação obtidos pelos métodos - da análise de variância, dos componentes principais e da análise estrutural -, foram calculados os números de avaliações necessárias. Concluiu-se que os comprimentos do hipocótilo, do epicótilo e do internódio requereram menor quantidade de medição em comparação com os comprimentos do pecíolo e da raque, para o mesmo nível de confiabilidade; e com 15 medições obteve-se 85% de confiabilidade para comprimento do hipocótilo pelos métodos ANOVA e AE(correl) e 90% para CP(correl) e CP(cov); 90% de confiabilidade para comprimento do epicótilo e do internódio pelos métodos ANOVA, CP(correl), CP(cov) e AE(correl); 80% de confiabilidade para comprimento da raque da primeira folha trifoliolada pelos métodos ANOVA, CP(correl), CP(cov) e AE(correl); e, para o comprimento do pecíolo da primeira folha trifoliolada, seriam necessárias 21 medições para confiabilidade de 80% pelos métodos ANOVA e AE(correl) e de 85% pelos CP(correl) e CP(cov).
Studies involving additional descriptors has been important for soybean genetic improvement, so this study aimed to estimate the repeatability the length coefficient of hypocotyl, epicotyl, the internode between the unifoliated leaf nodes and the first trifoliate leaf, from the petiole and from the rachis of the first trifoliate leaf stage and determine the minimum number of evaluations needed to predict the real value of the genotypes. The study was conducted at the Universidade Federal de Viçosa, analyzing 85 soybean genotypes in four experiments in a completely randomized design. The numbers of necessary evaluations were calculated from the estimates of repeatability and coefficient of determination obtained by the methods of analysis of variance of the principal component and by the structural analysis. It was concluded that the lengths of the hypocotyl, epicotyl and the internode required fewer measurements compared with the length of the petiole and rachis to the same level of reliability, and with 15 measurements 85% of reliability was obtained for hypocotyl length by ANOVA and AE(correl) methods and 90% by CP(correl) and CP(cov) methods; 90% reliability was obtained for epicotyl and internode length by ANOVA, CP(correl), CP(cov) and AE(correl) method; 80% reliability was obtained for rachis length by ANOVA, CP(correl), CP(cov) and AE(correl) methods; and for petiole length, 21 measurements were needed for reliability by ANOVA and AE(correl) methods and 85% for CP(correl) and CP(cov) methods.
Reference Key
matsuo2012cinciaanlise Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Éder Matsuo;Tuneo Sediyama;Cosme Damião Cruz;Rita de Cássia Teixeira Oliveira
Journal Trials
Year 2012
DOI
10.1590/S0103-84782012000200001
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000200001
Keywords
glycine max distinguishabilityagricultureagriculture (general)

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