Strategy in the selection of corn genotypes for their efficiency and response to nitrogen

Corn is of great importance in the national economy, being one of the most produced and exported cereals in Brazil. With the growing concern of producing food for the population, the search for new corn genotypes is increasingly intensified in order to obtain efficient seeds with an adequate response to the particularities of each planting region. In this sense, the present work aims to identify genotypes of corn efficient and responsive to the use of nitrogen for grain production in the Cerrado biome. The studies were carried out in two maize trials at the Federal University of Tocantins Agricultural Center (UFT), Campus de Palmas - Brazil, with planting in the 2017/18 crop, with nitrogen (BN) (0 kg ha−1) and another in high nitrogen (AN) (150 kg ha−1). The experimental design was a randomized block with three replicates and 20 treatments with an analysis of the response of these effects on grain yield. The methodology of Fageria & Kluthcouski (1980) was used to identify efficient and responsive genotypes. The genotype UFT-M12 was classified as efficient and responsive regarding the use of N for grain yield.