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https://locus.ufv.br//handle/123456789/25629
Tipo: | Artigo |
Título: | Selection of maize top-crosses for different nitrogen levels through specific combining ability |
Autor(es): | Ribeiro, Larissa Pereira Bhering, Leonardo Lopes Heinz, Rafael Gonçalves, Manoel Carlos Teodoro, Paulo Eduardo |
Abstract: | An alternative to increase yield without raising the production costs and minimizing the dependence of agricultural inputs is the development of maize genotypes presenting high nitrogen (N) use efficiency under low N level conditions. Thus, the objective of this study was to estimate the specific combining ability of maize top-crosses under high and low nitrogen (N) conditions and to select high-yielding hybrids for both conditions. The grain yield of 110 top-cross hybrids was evaluated in 2012 in two locations in the Brazilian Midwest. Partial diallel analysis was performed with the adjusted means of each of the individual top-cross analyses. Specific combining ability (SCA) of the hybrids and their interaction with N levels was estimated for each location. The mean grain yield of the 11 hybrids selected by the highest SCA estimates for high and low N was higher than the controls mean in approximately 330 and 241 kg∙ha-1. These results demonstrate that the selection for each environment was efficient and reveals the possibility of developing new hybrids for the Brazilian Cerrado region. |
Palavras-chave: | Zea mays L. Diallel Hybrid combination Nitrogen use efficiency |
Editor: | Bragantia |
Tipo de Acesso: | Open Access |
URI: | http://dx.doi.org/10.1590/1678-4499.20180196 http://www.locus.ufv.br/handle/123456789/25629 |
Data do documento: | 2019 |
Aparece nas coleções: | Artigos |
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artigo.pdf | Texto completo | 481,46 kB | Adobe PDF | Visualizar/Abrir |
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