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


Autoři: Adriano dos Santos aff001;  Antônio Teixeira do Amaral Júnior aff001;  Roberto Fritsche-Neto aff002;  Samuel Henrique Kamphorst aff001;  Fernando Rafael Alves Ferreira aff001;  José Francisco Teixeira do Amaral aff003;  Janieli Maganha Silva Vivas aff001;  Pedro Henrique Araújo Diniz Santos aff001;  Valter Jário de Lima aff001;  Shahid Khan aff001;  Kátia Fabiane Medeiros Schmitt aff001;  Jhean Torres Leite aff001;  Divino Rosa dos Santos Junior aff001;  Rosimeire Barboza Bispo aff001;  Talles de Oliveira Santos aff001;  Uéliton Alves de Oliveira aff001;  Lauro José Moreira Guimarães aff004;  Oscar Rodriguez aff005
Působiště autorů: Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ, Brazil aff001;  Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz (ESALQ), Piracicaba, SP, Brazil aff002;  Departamento de Engenharia Rural, Centro de Ciências Agrárias e Engenharias, Universidade Federal do Espírito Santo (UFES), Alegre, ES, Brazil aff003;  Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Centro Nacional de Pesquisa de Milho e Sorgo, Sete Lagoas, MG, Brazil aff004;  Department of Agronomy and Horticulture, University of Nebraska, Nebraska, United States of America aff005
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pone.0222726

Souhrn

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.

Klíčová slova:

Gene expression – Maize – Quantitative trait loci – Agricultural soil science – Crops – Fertilizers – Agronomy – Crop genetics


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