Adaptability and phenotypic stability of soybean cultivars for grain yield and oil content.

ABSTRACT. The aim of this study was to verify the adaptability and stability of soybean cultivars with regards to yield and oil content. Data of soybean yield and oil content were used from experiments set up in six environments in the 2011/12 and 2012/13 crop seasons in the municipalities of Patos de Minas, Uberaba, Lavras, and São Gotardo, Minas Gerais, Brazil, testing 36 commercial soybean cultivars of both conventional and transgenic varieties. The Wricke method and GGE biplot analysis were used to evaluate adaptability and stability of these cultivars. Large variations were observed in grain yield in relation to the different environments studied, showing that these materials are adaptable. The cultivars exhibited significant differences in oil content. The cultivars BRSGO204 (Goiânia) and BRSMG (Garantia) exhibited the greatest average grain yield in the different environments studied, and the cultivar BRSMG 760 SRR had the greatest oil content among the cultivars evaluated. Ecovalence was adopted to identify the most stable cultivars, and the estimates were nearly uniform both for grain yield and oil content, showing a variation of 0.07 and 0.01%, respectively. The GGE biplot was efficient at identifying cultivars with high adaptability and phenotype stability.

Farinha de Tempeh liofilizado ou torrado na formulação de biscoitos de coco em substituição parcial à farinha de soja: elaboração e caracterização.

2013

Evolução do índice de área foliar e índice SPAD da soja em função da densidade de semeadura.

2016

Biological characteristics of black armyworm Spodoptera cosmioides on genetically modified soybean and corn crops that express insecticide Cry proteins.

This study aimed to evaluate the development and reproduction of the black armyworm, Spodoptera cosmioides when larvae fed on leaves of Bt-corn hybrids, expressing a single Cry1F and also Cry1F, Cry1A.105 and Cry2Ab2 in pyramided corn and their non-Bt-isoline (hybrid 2B688), as well as on leaves of two soybean isolines expressing the Cry1Ac protein and its non-Bt isoline (A5547-227). We also assessed the effect of these Bt and non-Bt plants on the leaf consumption rate of S. cosmioides larvae. This pest was unable to develop when fed on any of the corn isolines (Bt and non-Bt). When both 1st and 3rd instar larvae were fed on corn leaf, mortality was 100% in both Bt and non-Bt corn. In contrast, when corn leaves were offered to 5th instar larvae, there were survivors. Defoliation and leaf consumption was higher with non-Bt corn than with both of the Bt corn isolines. There was no negative effect of Bt soybean leaves on the development and reproduction of S. cosmioides with respect to all evaluated parameters. Our study indicates that both Bt and non-Bt corn adversely affect the development of S. cosmioides while Bt soybean did not affect its biology, suggesting that this lepidopteran has major potential to become an important pest in Bt soybean crops.

Fitorreguladores associados à adubação nitrogenada no manejo da soja.

2016

Lactofem e etefom como reguladores de crescimento de cultivares de soja.

2016

Espaçamento entre fileiras e adubação foliar nitrogenada na cultura da soja na região "SEALBA".

2016

Tolerância da soja BRS 391 aos danos de percevejos sugadores de grãos.

2016

Suscetibilidade de populações de Chrysodexis includens e Helicoverpa armigera a inseticidas do grupo das diamidas.

2016

Efeitos de Bacillus thuringiensis (Cry1Ac) na atividade do vírus de poliedrose nuclear de Spodoptera frugiperda.

2016

Percepção sobre o ataque de ácaros em soja.

2016

Avaliação da reação de acessos de amendoim forrageiro a Phakopsora pachyrhizi.

2016

Ensaio cooperativo para avaliação da eficiência de fungicidas no controle da ferrugem-asiática da soja, Phakopsora pachyrhizi, na safra 2015/16, em Londrina, PR.

2016

Ensaio em rede de fungicidas para o controle de doenças, na cultura da soja, SINOP/MT, safra 2015/2016.

2016

Reação de linhagens de soja a mancha bacteriana marrom.

2016