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Publications of : R.L. Hamawaki
Plant Genetics   Research Article

Behavior of soybean genotypes in three locations in the Triângulo Mineiro

Soy is an important legume for global economy. The objectives of this study were evaluated soybean genotypes in different growing environments as for their agronomic characters and resistance to leaf spots, and determine the adaptability and phenotypic stability of materials in relation to the place of cultivation. Experiments were conducted in the cities of São Gotardo, Uberaba and Uber.. Read More»

Genet. Mol. Res. 18(3):

Plant Genetics   Research Article

Correlations between traits in soybean (Glycine max L.) naturally infected with Asian rust (Phakopsora pachyrhizi)

    B. Rodrigues, F. Serafim, A.P.O. Nogueira, O.T. Hamawaki, L.B. de Sousa and R.L. Hamawaki

Soybean (Glycine max L.)-breeding programs aim to develop cultivars with high grain yields and high tolerance to Asian soybean rust (Phakopsora pachyrhizi). Considering that the traits targeted for breeding are mainly quantitative in nature, knowledge of associations between traits allows the breeder to formulate indirect selection strategies. In this study, we investigated phenotypic, genotypi.. Read More»

Genet. Mol. Res. 14(4): 2015.December.21.45

DOI: 10.4238/2015.December.21.45

Plant Genetics   Research Article

Evaluation of soybean lines and environmental stratification using the AMMI, GGE biplot, and factor analysis methods

    L.B. Sousa, O.T. Hamawaki, A.P.O. Nogueira, R.O. Batista, V.M. Oliveira and R.L. Hamawaki

In the final phases of new soybean cultivar development, lines are cultivated in several locations across multiple seasons with the intention of identifying and selecting superior genotypes for quantitative traits. In this context, this study aimed to study the genotype-by-environment interaction for the trait grain yield (kg/ha), and to evaluate the adaptability an.. Read More»

Genet. Mol. Res. 14(4): 2015.October.19.10

DOI: 10.4238/2015.October.19.10

Plant Genetics   Research Article

Selection for wide adaptability and high phenotypic stability of Brazilian soybean genotypes

    V.M. Oliveira, O.T. Hamawaki, A.O. Nogueira, L.B. Sousa, F.M. Santos and R.L. Hamawaki

Advances in genetic enhancement techniques have led to an increase in soybean production. Thus, soybean is currently one the most economically important cultured species worldwide. The objectives of the present study were to study the interaction of soybean genotypes per environment in terms of grain productivity and to evaluate their phenotypic adaptability and stability, with the final aim of.. Read More»

Genet. Mol. Res. 15(1): gmr.15017843

DOI: 10.4238/gmr.15017843

Plant Genetics   Research Article

Selecting soybean resistant to the cyst nematode Heterodera glycines using simple sequence repeat (microssatellite) markers

    S.M.C.G. Espindola O.T. Hamawaki A.P. Oliveira C.D.L. Hamawaki R.L. Hamawaki L.M. Takahashi

The soybean cyst nematode (SCN) is a major cause of soybean yield reduction. The objective of this study was to evaluate the efficiency of marker-assisted selection to identify genotypes resistant to SCN race 3 infection, using Sat_168 and Sat-141 resistance quantitative trait loci. The experiment was carried out under greenhouse conditions, using soybean populations originated from crosses bet.. Read More»

Genet. Mol. Res. 15(1): gmr.15016850

DOI: 10.4238/gmr.15016850

Plant Genetics   Research Article

Inheritance of Precocity and of Agronomic Characters in Soybean

    F.G. Teixeira, O.T. Hamawaki, A.P.O. Nogueira, R.L. Hamawaki, C.L. Hamawaki, T.P. Mattos, I.C. Silveira and L.A. Medeiros

Precocious soybean cultivars enable crop rotation and low pressure to the biotic and abiotic factors. This study aimed to determinate the inheritance of characters related to precocity and agronomic characters in soybean segregating population, coming from contrasting genitors to cycle. The experiment was conducted at a greenhouse located at Capim Branco farm, be.. Read More»

Genet. Mol. Res. 16(4): gmr16039842

DOI: 10.4238/gmr16039842

Plant Genetics   Research Article

Adaptability and Stability of Soybean Genotypes in the States of Maranhão, Piauí, Tocantins and Bahia

    O.T. Hamawaki, A.P.O. Nogueira, F.G. Teixeira, T.F. Bicalho, G.L. Jorge, R.L. Hamawaki, C.S. Machado Júnior, G.F. Gomes, C.L. Hamawaki

The soybean crop has a substantial importance for Brazil’s agribusiness and economy. Besides, breeding programs have contributed to the development of the crop in the country allowing grain yield increase and, at the same time, intensifying the production of new cultivars that show both yield predictability and wide adaptation. This study was aimed at evaluati.. Read More»

Genet. Mol. Res. 17(1): gmr16039895

DOI: 10.4238/gmr16039895

Plant Genetics   Research Article

Analysis of the genetic divergence of soybean lines through hierarchical and Tocher optimization methods

    D.A.V. Cantelli, O.T. Hamawaki, M.R. Rocha, A.P.O. Nogueira, R.L. Hamawaki, L.B. Sousa, C.D.L. Hamawaki

This study aimed to evaluate the clustering pattern consistency of soybean (Glycine max) lines, using seven different clustering methods. Our aim was to evaluate the best method for the identification of promising genotypes to obtain segregating populations. We used 51 generations F5 and F6 soybean lines originating from different hybridizations and backcrosses obta.. Read More»

Genet. Mol. Res. 15(4): gmr.15048836

DOI: 10.4238/gmr.15048836

Microbial Genetics   Research Article

Adaptability and stability of soybean genotypes in off-season cultivation

    R.O. Batista, R.L. Hamawaki, L.B. Sousa, A.P.O. Nogueira and O.T. Hamawaki

The oil and protein contents of soybean grains are important quantitative traits for use in breeding. However, few breeding programs perform selection based on these traits in different environments. This study assessed the adaptability and stability of 14 elite early soybean breeding lines in off-season cultivation with respect to yield, and oil and protein contents. A range of statistical met.. Read More»

Genet. Mol. Res. 14(3): 2015.August.14.26

DOI: 10.4238/2015.August.14.26

Plant Genetics   Research Article

Phenotypic and genotypic correlations between soybean agronomic traits and path analysis

The goals of this research were to evaluate the phenotypic and genotypic correlations between agronomic traits, to perform path analysis, having as main character grain yield, and to identify indirect selection criteria for grain yield. The experiment was carried out in an experimental area located at Capim Branco farm, which belongs to Federal University of Uberl&a.. Read More»

Genet. Mol. Res. 16(2): gmr16029696

DOI: 10.4238/gmr16029696

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