Relative importance of gene effects for nitrogen-use efficiency in popcorn.

The objective of this study was to evaluate the effects of additive and non-additive genes on the efficiency of nitrogen (N) use and N responsiveness in inbred popcorn lines. The parents, hybrids and reciprocal crosses were evaluated in a 10x10 triple lattice design at two sites and two levels of N availability. To establish different N levels in the two experiments, fertilization was carried out at sowing, according to soil analysis reports. However, for the experiments with ideal nitrogen availability, N was sidedressed according to the crop requirement, whereas for the N-poor experiments sidedressing consisted of 30% of that applied in the N-rich environment. Two indices were evaluated, the Harmonic Mean of the Relative Performance (HMRP) and Agronomic Efficiency under Low Nitrogen Availability (AELN), both based on grain yield at both N levels. Both additive and non-additive gene effects were important for selection for N-use efficiency. Moreover, there was allelic complementarity between the lines and a reciprocal effect for N-use efficiency, indicating the importance of the choice of the parents used as male or female. The best hybrids were obtained from inbred popcorn lines with contrasting N-use efficiency and N responsiveness.

Bibliographic Details

Main Authors:	SANTOS, A., AMARAL JÚNIOR, A. T. do, FRITSCHE-NETO, R., KAMPHORST, S. H., FERREIRA, F. R., AMARAL, J. F. T. do, VIVAS, J. M. S., SANTOS, P. H. A. D., LIMA V. J. de, KHAN, S., SCHMITT, K. F. M., LEITE, J. T., SANTOS JUNIOR, D. R. dos, BISPO, R. B., SANTOS, T. de O., OLIVEIRA, U. A. de, GUIMARAES, L. J. M., RODRIGUEZ, O.
Other Authors:	Adriano dos Santos, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Antônio Teixeira do Amaral Júnior, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Roberto Fritsche-Neto, Escola Superior de Agricultura Luiz de Queiroz; Samuel Henrique Kamphorst, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Fernando Rafael Alves Ferreira, Universidade Estadual do Norte Fluminense Darcy Ribeiro; José Francisco Teixeira do Amaral, Universidade Federal do Espíito Santo; Janieli Maganha Silva Vivas, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Pedro Henrique Araújo Diniz Santos, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Valter Jário de Lima, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Shahid Khan, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Kátia Fabiane Medeiros Schmitt, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Jhean Torres Leite, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Divino Rosa dos Santos Junior, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Rosimeire Barboza Bispo, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Talles de Oliveira Santos, Universidade Estadual do Norte Fluminense Darcy Ribeiro; Uéliton Alves de Oliveira, Universidade Estadual do Norte Fluminense Darcy Ribeiro; LAURO JOSE MOREIRA GUIMARAES, CNPMS; Oscar Rodriguez, University of Nebraska.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2019-10-11
Subjects:	Gene, Nitrogênio, Milho Pipoca, Linhagem,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113056
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