Genetic divergence in corn indifferent concentrations of the powder

The main purpose of the study was to determine the genetic divergence among the ten corn genotypes cultivated in the 2017/2018 crop in the municipality of Santa Maria das Barreiras-PA. The work consisted basically of making an experiment with corn genotypes at different concentrations of potassium (high, low and general (low + high)). Both experiments were conducted in randomized blocks, with line spacing 0.9 meters, a total of three repetitions for each potassium concentration. The characteristics evaluated in each assay were plant height, spike height, spike diameter, spike length, number of grains in the spike row, number of rows on the cob and productivity. Genetic divergence was determined from the generalized Mahalanobis Distance method and the grouping of genotypes with genetic similarity was estimated by the Tocher optimization method, both in order to select the best maize genotypes for the genetic breeding program. Potassium doses influenced the grouping of genotypes. The characteristic PROD, can be used in breeding programs aimed at low and high use of inputs. It presents the need for improvement conduction in different tests.