Número necessário de experimentos para a análise de trilha em feijão

Filho, Alberto Cargnelutti; Ribeiro, Nerinéia Dalfollo; Burin, Cláudia; Toebe, Marcos; Casarotto, Gabriele

doi:10.1590/s0103-84782011005000036

Cited by 5 publications

(6 citation statements)

References 7 publications

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“…Thus, assuming the largest one of the 290 estimates of Xs (Table 3 and Figure 2), rounded up to the nearest integer, it can be inferred that seven experiments (environments) are sufficient to analyze the adaptability and stability of grain yield of maize cultivars with the Eberhart & Russell (1966) model. A similar number of experiments was established by Cargnelutti Filho et al (2006, 2009a, 2011, and Benin et al (2014).…”

Section: Sources Of Variationsupporting

confidence: 55%

“…A discussion on the theoretical bases related to the adequate number of experimental environments in the study of genotype x environment interaction was performed by Resende (1998). Applied studies have been developed to determine the required number of experiments to compare bean cultivars (Cargnelutti Filho et al, 2006), by cluster analysis (Cargnelutti Filho et al, 2009a), and by path analysis (Cargnelutti Filho et al, 2011). Benin et al (2014) studied the optimal number of trials to predict grain yield of wheat genotypes, in order to select and recommend cultivars.…”

Section: Introductionmentioning

confidence: 99%

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Sufficient number of experiments for the adaptability and stability analyses of maize using the Eberhart and Russell method

Filho

Guadagnin

2018

Pesq. agropec. bras.

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The objective of this work was to determine the sufficient number of experiments (environments) for the adaptability and stability analyses of maize cultivars, using the Eberhart and Russell method. Grain yield data from 63 trials of maize cultivars from six groups of experiments were used. In each group, new data files were formed from all experiments (n), for the combinations of 3, 4, ..., n-1 experiments, totaling 10,381 files. Mean and estimates of the adaptability (b) and stability (S2d) parameters were obtained for each cultivar, in each file. A power function was adjusted for the amplitudes of b and S2d (dependent variables) in each cultivar, as a function of the number of experiments (independent variable), totaling 290 equations (145 cultivars × two dependent variables). For each equation, the value was determined on the abscissa axis (Xs, sufficient number of experiments), corresponding to the point of maximum curvature. The highest value among the 290 estimates of Xs, rounded up to the nearest integer, was assumed to be the sufficient number of experiments for the analyses. Seven experiments are sufficient to analyze the adaptability and stability of maize cultivars using the Eberhart and Russell method.

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Section: Sources Of Variationsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Sufficient number of experiments for the adaptability and stability analyses of maize using the Eberhart and Russell method

Filho

Guadagnin

2018

Pesq. agropec. bras.

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“…Por isso, são encontrados resultados distintos na literatura para a análise de correlação linear simples e para a análise de trilha em feijão. Para minimizar esse problema , Cargnelutti Filho et al (2011) recomendaram o uso de sete experimentos para a análise de trilha dos componentes da produtividade de grãos em feijão. Entretanto, nem sempre é possível conduzir um número tão elevado de experimentos para se fazer inferências sobre a análise de trilha em feijão.…”

Section: Introductionunclassified

Avaliação dos componentes da produtividade de grãos em feijão de grãos especiais

2014

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ResumoO melhoramento de feijão de grãos especiais ainda é restrito no Brasil. Portanto, foram objetivos deste trabalho avaliar os efeitos da interação linhagem x ambiente sobre os componentes da produtividade de grãos em feijão de grãos especiais, selecionar linhagens de alta produtividade de grãos e avaliar a associação linear e as relações diretas e indiretas entre os componentes da produtividade de grãos. Para tanto, 29 linhagens de feijão de grãos especiais foram avaliadas em diferentes locais, anos e épocas de cultivo. Interação linhagem x ambiente significativa foi obtida para o número de vagens por planta, o número de grãos por planta, o número de grãos por vagem, a massa de 100 grãos e a produtividade de grãos. As cultivares IAC Galante, Xamego, BRS MG Realce e Rosinha G2 apresentaram alta produtividade de grãos, sendo seu cultivo promissor para os ambientes avaliados. Coeficiente de correlação linear positivo foi obtido entre a produtividade de grãos e o número de vagens por planta (r=0,4704) e o número de grãos por vagem (r=0,4254). Esses caracteres também apresentaram os maiores efeitos diretos sobre a produtividade de grãos. A seleção indireta para o número de vagens por planta e o número de grãos por vagem é de eficiência moderada para o aumento da produtividade de grãos, em linhagens de feijão de grãos especiais.Palavras-chave adicionais: análise de trilha; correlação de Pearson; interação genótipo x ambiente; linhas puras; Phaseolus vulgaris L.. AbstractThe genetic improvement of special grains bean cultivars is still very limited in Brazil. The objective of this study was to evaluate the effects of the interaction line x environment on grain yield components in special grains bean cultivars, select high grain yield lines and to evaluate the linear association and the direct and indirect relations between the grain yield components. So, 29 special grains bean lines were studied in several places, years and cultivation time. Significant interaction line x environment was observed for number of pods per plant, number of grains per plant number of grains per pod, the mass of 100 grains and grain yield. Cultivars 'IAC Galante', 'Xamego', 'BRS MG Realce', and 'Rosinha' showed high grain yield and are thus indicated for cultivation under the studied conditions. A positive linear correlation coefficient was observed between grain yield and number of pods per plant (r=0.4704) and the number of grains per pod (r=0.4254). These characters had also the highest direct effects on grain yield. The indirect selection for number of pods per plant and the number of grains per pod is of moderate efficiency for grain yield increments.

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“…So, it can be inferred that seven experiments are enough for the analysis of adaptability and stability of maize cultivars. A similar number of experiments was established by CARGNELUTTI FILHO et al (2006), CARGNELUTTI FILHO et al (2009b), CARGNELUTTI FILHO et al (2011 and BENIN et al (2014). Table 4 -Number of combinations and respective percentage, between parentheses, in which the Spearmans correlation coefficient (r) among the estimates of the parameter of adaptability and stability (Pi) of LIN & BINNS (1988) obtained at the combinations of 2, 3, 4, ..., n experiments with Pi of all the experiments (reference), was greater than or equal to 0.70, 0.75, 0.80, 0.85, 0.90, 0.95 and 1.00.…”

Section: ------------------------------------------------Early Cycle mentioning

confidence: 83%

“…Theoretical foundations concerning the appropriate number of environments for experimentation for the study of genotypes x environment interaction were discussed by RESENDE (1998). Conversely, applied studies, i.e., studies based on data from experiments for evaluation of bean cultivars have been developed with the purpose of determining the necessary number of experiments for cultivars comparison (CARGNELUTTI FILHO et al, 2006), cluster (CARGNELUTTI FILHO et al, 2009b) and path analysis (CARGNELUTTI FILHO et al, 2011). Optimal number of trials for the prediction of grain yield of wheat genotypes aimed for selection and recommendation of cultivars was studied by BENIN et al (2014).…”

Section: Introductionmentioning

confidence: 99%

Number of experiments for adaptability and stability analysis in maize by Lin and Binns method

Filho

Guadagnin²

2018

Cienc. Rural

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The objective of this study was to determine the necessary number of experiments to analyze the adaptability and stability of maize cultivars (Zea mays L.) using the Lin and Binns method. Grain yield data extracted from 63 maize cultivar trials were used. Trials were divided in six groups of experiments, according to the cycle (early and super early) and the agricultural year (2002/2003, 2003/2004, and 2004/2005). In each group, from the set of all experiments (reference file) new data files were formed by combinations in groups of 2, 3, 4, ..., n-1 experiments, with a total of 10,683 files. For each file, the estimation of the adaptability and stability parameter (Pi) of the Lin and Binns method was calculated. To verify the degree of association of the estimates of Pi obtained with the combinations of experiments and with all the experiments (reference), Spearman correlation coefficient (r) was used. Number of experiments giving values of r≥0.80 in 100% of the combinations was considered sufficient. Seven experiments sufficed for the analysis of adaptability and stability of maize cultivars by the method of Lin and Binns.

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Número necessário de experimentos para a análise de trilha em feijão

Cited by 5 publications

References 7 publications

Sufficient number of experiments for the adaptability and stability analyses of maize using the Eberhart and Russell method

Sufficient number of experiments for the adaptability and stability analyses of maize using the Eberhart and Russell method

Avaliação dos componentes da produtividade de grãos em feijão de grãos especiais

Number of experiments for adaptability and stability analysis in maize by Lin and Binns method

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