Desempenho de híbridos topcross de milho para dupla aptidão

Abstract

The maize (Zea mays L.) in the semiarid region is the main forage used by producers in this area. However, studies conducted with this crop in the semiarid region for dual-purpose are still scarce. Therefore, the objective was to determine the productive potential of topcross maize hybrids and select genotypes with dual-purpose for cultivation in the semiarid region of Sergipe. Eleven maize hybrids were used in a randomized block design with three replications. Variables related to grain and forage production were evaluated. The data were subjected to Pearson correlation and GYT Biplot analysis. Pearson correlation showed that male and female flowering exhibited a medium negative correlation with variables such as ear weight, total grain weight, and number of ears per plot. Therefore, more productive genotypes tend to have fewer days to flowering. The first two principal components explained 91.45% of the variability in the observed data. Hybrids 10 - AG x MV2 and 11 - AG x MV11 are the materials showing the highest phenotypic stability, making them promising. It is concluded that selecting the variable number of ears per plot will lead to the indirect selection of genotypes with greater plant height and productivity, promising characteristics for silage production. Genotypes 10 - AG x MV2 and 11 - AG x MV11 are the materials showing the highest phenotypic stability, indicating that this material is stable and promising for dual purpose cultivation in the Semiarid region.