Aleatoriedade e variabilidade produtiva de feijão-de-vagem

Santos, Daniel; Haesbaert, Fernando Machado; Lúcio, Alessandro Dal’Col; Lopes, Sidinei José; Filho, Alberto Cargnelutti; Benz, Vilson

doi:10.1590/s0103-84782012005000040

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…The heterogeneity of variances between rows in the trials with horticultural crops has been attributed, among other causes, to the lateral openings of the greenhouse, which can provide differentiated growth conditions to the plants. The variability between cropping seasons is attributed to the oscillation in meteorological conditions between the seasons (Santos et al 2012).…”

Section: Resultsmentioning

confidence: 99%

“…The reduction in CVs values, provided by the exclusions, is related to the reduction of the means, since there are no significant changes in the magnitudes of variances. Lúcio et al (2008) and Santos et al (2012) point out that the lateral rows in protected environment are subjected to different conditions of air temperature and soil moisture. Possibly, the smallest CVs observed with the exclusion of lateral rows are due to the fact that these rows are in unfavorable conditions, with lower average production, and their exclusion has increased the average of the experiment, consequently reducing the CV.…”

Section: Resultsmentioning

confidence: 99%

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Variability, plot size and border effect in lettuce trials in protected environment

et al. 2018

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The variability within rows of cultivation may reduce the accuracy of experiments conducted in a complete randomized block design if the rows are considered as blocks, however, little is known about this variability in protected environments. Thus, our aim was to study the variability of the fresh mass in lettuce shoot, growing in protected environment, and to verify the border effect and size of the experimental unit in minimizing the productive variability. Data from two uniformity trials carried out in a greenhouse in autumn and spring growing seasons were used. In the statistical analyses, it was considered the existence of parallel cultivation rows the lateral openings of the greenhouse and of columns perpendicular to these openings. Different scenarios were simulated by excluding rows and columns to generate several borders arrangements and

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Variability, plot size and border effect in lettuce trials in protected environment

et al. 2018

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“…However, this crop has been widely grown by small farmers, and it is considered a good source of income and an alternative by which to diversify production. It is increasingly being used in crop rotation or in the off-season of other vegetable crops, including bell peppers and tomatoes (Francelino, Gravina, Manhães, Cardoso, & Araújo, 2011;Santos et al, 2012).…”

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confidence: 99%

<b>AFLP analysis of genetic diversity in determinate and indeterminate snap bean accessions

Andrade

Gonçalves²,

Miglioranza

et al. 2016

Acta Sci. Agron.

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ABSTRACT. The present study aimed to estimate and characterize the genetic divergence between determinate and indeterminate snap bean accessions from the Universidade Estadual de Londrina (UEL) germplasm bank based on amplified fragment length polymorphism (AFLP) markers. A total of 40 and 32 accessions with determinate and indeterminate growth habits, respectively, were characterized for this purpose. Seven combinations of primers corresponding to EcoR1 and Mse1 were tested for the AFLP analysis, and the combinations E-AAG/M-CTC, E-ACT/M-CTT and E-ACC/M-CTT were selected. These selective AFLP combinations revealed 485 informative loci in total, and the combination E-ACC/M-CTT detected the greatest number of informative loci (49%). The analysis of dissimilarity frequency distribution showed that the distribution was uniform, ranging from 0.1285 to 0.7310 with a mean of 0.4801, and the accessions with indeterminate growth habits exhibited greater variability than the accessions with determinate growth habits. The clustering UPGMA, PCoA and Bayesian analyses showed the formation of two large clusters, wherein there is a possible association between snap bean growth habit and gene pool. The determinate accessions may be more closely associated with the Andean gene pool, while the indeterminate ones may be associated with the Mesoamerican gene pool. The Bayesian analysis showed accessions intermediate to both groups, suggesting introgression between the Andean and Mesoamerican gene pools.Keywords: Phaseolus vulgaris L., molecular markers, amplified fragment length polymorphism, gene bank.Análise de AFLP na diversidade genética em acessos de feijão-de-vagem de hábito determinado e indeterminado RESUMO. O presente trabalho teve como objetivo estimar e caracterizar a divergência genética entre acessos de feijão-de-vagem determinado e indeterminado do banco de germoplasma da UEL com base em marcadores AFLP. Para tanto foram caracterizados 40 e 32 acessos de hábito determinado e indeterminado, respectivamente. Para análise do AFLP, sete combinações de primers EcoR1 e Mse1 foram testadas, sendo selecionadas as combinações E-AAG/M-CTC, E-ACT/M-CTT, E-ACC/M-CTT. Essas combinações de iniciador/enzima revelaram um total de 485 locos informativos, sendo a combinação E-ACC/M-CTT a que detectou o maior número de locos informativos (49%). A análise da distribuição das frequências da dissimilaridade revelou que a distribuição foi uniforme variando de 0.1285 a 0.7310 com média de 0.4801, com os acessos de hábito indeterminado apresentando uma maior variabilidade quando comparado com os de hábito determinado. Pelas análises de agrupamento UPGMA, PCoA e Bayesiana verificou-se a formação de dois grandes grupos, para os quais sugere-se uma possível predominância do hábito de crescimento do feijão-de-vagem quanto ao pool gênico. Os determinados podem estar mais associados ao pool gênico Andino, enquanto o indeterminado ao pool gênico Mesoamericano. Pela análise Bayesiana, verificou-se acessos intermediário aos dois grupos sugerindo-se u...

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Productive variability, border use and plot size in trials with cherry tomato

et al. 2018

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Knowing the productive variability within protected environments is crucial for choosing the experimental design to be used in that conditions. Thus, the aim of the present study was to assess the variability of fruit production in protected environment cultivated with cherry tomatoes and to verify the border effect and plot size in reducing this variability. To this, data from an uniformity test carried out in a greenhouse with cherry tomato cv. ‘Lili’ were used. Total fresh mass of fruits per plant was considered being these plants arranged in cropping rows parallel to the lateral openings of the greenhouse and also the same plants arranged in columns perpendicular to these openings. To generate the borders, different scenarios were designed by excluding rows and columns and using different plot sizes. In each scenario, homogeneity of variances among the remaining rows and columns was tested. There is no variability of fruit production among rows or columns in trials with cherry tomatoes carried out in greenhouses and the use of border does not bring benefits in terms of reduction of coefficient of variation or reduction of cases of variance heterogeneity among rows or columns. Plots with a size equal to or greater than two plants make possible to use the completely randomized design in the cherry tomato trials in greenhouses.

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Aleatoriedade e variabilidade produtiva de feijão-de-vagem

Abstract: Randomness and variability productive of bean podRecebido para publicação 07.01.

Cited by 6 publications

References 11 publications

Variability, plot size and border effect in lettuce trials in protected environment

Variability, plot size and border effect in lettuce trials in protected environment

<b>AFLP analysis of genetic diversity in determinate and indeterminate snap bean accessions

Productive variability, border use and plot size in trials with cherry tomato

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