DelPapa - Aplicativo computacional para a análise de dados de experimentos no delineamento blocos ao acaso, usando o método Papadakis

Storck, Lindolfo; Lazarotto, Tiago; Favarim, Fábio; Filho, Alberto Cargnelutti

doi:10.1590/0103-8478cr20131470

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“…Genes (CRUZ, 2013) software was used in these analyzes. The same trials were also analyzed using the randomized complete block design (RCBD) and spatial analysis or Papadakis method, using DelPapa (STORCK et al, 2015) software. From these analyzes, precision measurements were obtained as follows: relative efficiency for the use of complete block in relation to completely randomized design (CRD); relative efficiency of the use of triple lattice in relation to RCBD; error variation coefficient (VCe); genetic variation coefficient (VCg); ratio VCe/ VCg; and selective accuracy (SA), which was estimated as: SA = (1-1/F) 1/2 , for F>1, and SA = 0, for F<1, in which F is the F test value for the genotype.…”

Section: Methodsmentioning

confidence: 99%

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Methods of analysis and number of replicates for trials with large numbers of soybean genotypes

et al. 2017

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The aim of this study was to evaluate the experimental precision of different methods of statistical analysis for trials with large numbers of soybean genotypes, and their relationship with the number of replicates. Soybean yield data (nine trials; 324 genotypes; 46 cultivars; 278 lines; agricultural harvest of 2014/15) were used. Two of these trials were performed at the same location, side by side, forming a trial with six replicates. Each trial was analyzed by the randomized complete block, triple lattice design, and use of the Papadakis method. The selective accuracy, least significant difference, and Fasoulas differentiation index were estimated, and model assumptions were tested. The resampling method was used to study the influence of the number of replicates, by varying the number of blocks and estimating the precision measurements. The experimental precision indicators of the Papadakis method are more favorable as compared to the randomized complete block design and triple lattice. To obtain selective accuracy above the high experimental precision range in trials with 324 soybean genotypes, two repetitions can be used, and data can be analyzed using the randomized complete block design or Papadakis method.

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Section: Methodsmentioning

confidence: 99%

“…Regarding error estimates, homogeneity between genotype variances was verified using the Bartlett test (STEEL et al, 1997) with α=0.05. Normality of distribution and error randomness was assessed by the Shapiro-Wilk test (α=0.05) (STORCK et al, 2015).…”

Section: Methodsmentioning

confidence: 99%