Desempenho agronômico, heterose e heterobeltiose de variedades e híbridos intervarietais de milho em condições irrigadas e de sequeiro

Abstract

Due to the importance of corn in trade and animal feed in the target region, the creation of cultivars becomes a priority for the sustainability of the sertanejos. Therefore, the objective was to evaluate the agronomic performance, heterosis and heterobeltiosis of maize varieties and their intervarietals under irrigation and dryland. 10 maize varieties were crossed using the diallel method, from which 45 intervarietal hybrids (HI) were obtained, to be evaluated with 5 controls. The experiment was treated in two environments, irrigated and in rainfed conditions. accommodated plant and ear height, and grain yield. The GTbiplot model, heterosis and heterobeltiosis were used to select potential varieties for intervarietal generation. In the manova it was possible to observe that there is variability. Heterosis and heterobelthiosis highlighted HI in both environments, including H1, H13, H16, H32, H35, H5, H8 and H9, which showed positive heterosis in both. In the GTbiplots, the HI showed positive values in the two tests: H10, H13, H14, H16, H17, H19, H21, H26, H32 and H35, highlighting H16, H17 and H21. And they potentially highlighted the parents (P2, P9 and P3). It is concluded that the intervarietals F1(P1xP2), F1(P2xP6), F1(P2xP9), F1(P5xP7), F1(P5xP10), F1(P1xP5), F1(P1xP6), F1(P1xP9) and F1(P1xP10 ). offspring in both experiments, even crossing them with the less productive parent (P1).