Methods to classify maize cultivars in use efficiency and response to nitrogen
n plant breeding programs that aim to obtain cultivars with nitrogen (N) use efficiency, the focus is on methods of selection and experimental procedures that present low cost, fast response, high repeatability, and can be applied to a large number of cultivars. Thus, the objectives of this study we...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal De Viçosa
2013-10-01
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| Series: | Revista Ceres |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2013000500014&lng=en&tlng=en |
| _version_ | 1817985973742469120 |
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| author | Cleiton Lacerda Godoy Glauco Vieira Miranda Rodrigo Oliveira DeLima Leandro Vagno de Souza João Carlos Cardoso Galvão Izabel Cristina dos Santos |
| author_facet | Cleiton Lacerda Godoy Glauco Vieira Miranda Rodrigo Oliveira DeLima Leandro Vagno de Souza João Carlos Cardoso Galvão Izabel Cristina dos Santos |
| author_sort | Cleiton Lacerda Godoy |
| collection | DOAJ |
| description | n plant breeding programs that aim to obtain cultivars with nitrogen (N) use efficiency, the focus is on methods of selection and experimental procedures that present low cost, fast response, high repeatability, and can be applied to a large number of cultivars. Thus, the objectives of this study were to classify maize cultivars regarding their use efficiency and response to N in a breeding program, and to validate the methodology with contrasting doses of the nutrient. The experimental design was a randomized block with the treatments arranged in a split-plot scheme with three replicates and five N doses (0, 30, 60, 120 and 200 kg ha-1) in the plots, and six cultivars in subplots. We compared a method examining the efficiency and response (ER) with two contrasting doses of N. After that, the analysis of variance, mean comparison and regression analysis were performed. In conclusion, the method of the use efficiency and response based on two N levels classifies the cultivars in the same way as the regression analysis, and it is appropriate in plant breeding routine. Thus, it is necessary to identify the levels of N required to discriminate maize cultivars in conditions of low and high N availability in plant breeding programs that aim to obtain efficient and responsive cultivars. Moreover, the analysis of the interaction genotype x environment at experiments with contrasting doses is always required, even when the interaction is not significant. |
| first_indexed | 2024-04-14T00:03:40Z |
| format | Article |
| id | doaj.art-145dea4fa7cf4b6bba3d754632395636 |
| institution | Directory Open Access Journal |
| issn | 2177-3491 |
| language | English |
| last_indexed | 2024-04-14T00:03:40Z |
| publishDate | 2013-10-01 |
| publisher | Universidade Federal De Viçosa |
| record_format | Article |
| series | Revista Ceres |
| spelling | doaj.art-145dea4fa7cf4b6bba3d7546323956362022-12-22T02:23:36ZengUniversidade Federal De ViçosaRevista Ceres2177-34912013-10-0160569970510.1590/S0034-737X2013000500014S0034-737X2013000500014Methods to classify maize cultivars in use efficiency and response to nitrogenCleiton Lacerda Godoy0Glauco Vieira Miranda1Rodrigo Oliveira DeLima2Leandro Vagno de Souza3João Carlos Cardoso Galvão4Izabel Cristina dos Santos5Universidade Federal de ViçosaUniversidade Federal de ViçosaUniversidade Federal de ViçosaDow AgroSciences Industrial LtdaUniversidade Federal de ViçosaEmpresa de Pesquisa Agropecuária de Minas Geraisn plant breeding programs that aim to obtain cultivars with nitrogen (N) use efficiency, the focus is on methods of selection and experimental procedures that present low cost, fast response, high repeatability, and can be applied to a large number of cultivars. Thus, the objectives of this study were to classify maize cultivars regarding their use efficiency and response to N in a breeding program, and to validate the methodology with contrasting doses of the nutrient. The experimental design was a randomized block with the treatments arranged in a split-plot scheme with three replicates and five N doses (0, 30, 60, 120 and 200 kg ha-1) in the plots, and six cultivars in subplots. We compared a method examining the efficiency and response (ER) with two contrasting doses of N. After that, the analysis of variance, mean comparison and regression analysis were performed. In conclusion, the method of the use efficiency and response based on two N levels classifies the cultivars in the same way as the regression analysis, and it is appropriate in plant breeding routine. Thus, it is necessary to identify the levels of N required to discriminate maize cultivars in conditions of low and high N availability in plant breeding programs that aim to obtain efficient and responsive cultivars. Moreover, the analysis of the interaction genotype x environment at experiments with contrasting doses is always required, even when the interaction is not significant.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2013000500014&lng=en&tlng=enregressãoresponsivoseleçãoíndiceZea mays L |
| spellingShingle | Cleiton Lacerda Godoy Glauco Vieira Miranda Rodrigo Oliveira DeLima Leandro Vagno de Souza João Carlos Cardoso Galvão Izabel Cristina dos Santos Methods to classify maize cultivars in use efficiency and response to nitrogen Revista Ceres regressão responsivo seleção índice Zea mays L |
| title | Methods to classify maize cultivars in use efficiency and response to nitrogen |
| title_full | Methods to classify maize cultivars in use efficiency and response to nitrogen |
| title_fullStr | Methods to classify maize cultivars in use efficiency and response to nitrogen |
| title_full_unstemmed | Methods to classify maize cultivars in use efficiency and response to nitrogen |
| title_short | Methods to classify maize cultivars in use efficiency and response to nitrogen |
| title_sort | methods to classify maize cultivars in use efficiency and response to nitrogen |
| topic | regressão responsivo seleção índice Zea mays L |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2013000500014&lng=en&tlng=en |
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