Jeeder Fernando Naves Pinto
Abstract:
Corn presents an important function in the national and global economy, continuously increasing its total production due to advances in technologies, and the opening of new frontiers. The use of new sources of germplasm has a fundamental importance, so that it can generate cultivars more adapted to the diversity of environments and period of planting. The aim of this study was to evaluate 36 populations of maize in three contrasting environments obtained from methods that select from the combinatorial capacity, aiming to identify the existence of the genotype interaction by environments, to classify the populations regarding adaptability and stability, through the methodologies of Eberhart & Russell and Mixed Models, indicate the best populations for compound formation and compare the two methodologies. The environments evaluated were: A1-safrinha in the experimental area of the UFG with incidence of water stress; A2 - harvest in sandy soil, in family agriculture area and A3 - harvest in the experimental area of UFG. Agronomic characteristics of interest were evaluated. The gain by selection and the analysis of the adaptability and stability for the grain weight variable were estimated. Population 36 has high production, adaptability and general stability for the three environments. The average heritability of the genotypes (ℎଶ) was 0.543, indicating the possibility of making selection. The accuracy estimate (73.7%) indicates reliability in genotype selection. The two methodologies presented similar results in the classification of populations regarding adaptability and stability in the three environments, differing only in the classification of some populations.
