Variabilidad fenotipica, y desarrollo de estolones de pasto Janeiro (Eriochloa polystachya Kunth), irradiados a 52 gy de rayos gamma (60co)

Abstract

For this research, stolons of Janeiro grass were used, irradiated with (52 Gy) of gamma rays (60 Co), two treatments were established, the first with the material irradiated at 52 Gy and a control treatment (without irradiation). For the characterization and development analyzes, agronomic variables (VA) were managed such as: plant height, stem diameter, leaf length, leaf width, leaf area, chlorophyll level, fresh stem biomass, fresh leaf biomass, biomass fresh plant, dry stem biomass, dry foliar biomass, dry plant biomass, number of leaves and nodes, days of flowering, dry matter yield; To evaluate grasp, the counting method was applied. In addition, arithmetic means (MA), variation ranges (RV), standard deviations (SD), variation coefficients (CV) were applied; the population of individuals evaluated to develop this research was n = 40. Also, Pearson's methodology was applied to establish the correlation between variables. Obtaining as a result in the little dispersion or differences between the evaluated variables of the species in each of the treatments analyzed 52 Gy and the Control; since all the values ​​obtained from the Coefficient of Variation did not exceed 50 percent variability (CV <50%). For the variable stolon seizure where the count of live seedlings was used, the highest average was for the irradiated treatment with 77.85% seizure. For the variable days of flowering it is evident that the irradiation affects the precocity of the plant, being less in its emission.