Análises biplot na avalia？？o de cultivares de trigo em diferentes níveis de manejo

the objective of this study was to evaluate the agronomic performance of wheat cultivars under different management levels. experiments were carried out in pato branco (pr), within crop years 2008 and 2009. the experimental design was randomized blocks in factorial scheme, with three replicates. treatments consisted in four levels of management, control (e1), traditional (e2) and optimized (e3 and e4), distinguished by level of chemical fertilization and by control of weeds, pests and diseases. methodologies in ammi and gge biplot graphics were used for data analysis. the levels of management maximized the wheat yield, especially when meteorological features were not limiting. adaptability showed difference among cultivars in the crop managements. the brs guamirim cultivar showed adaptability to levels e3 and e4 in crop year 2008, whereas it was associated to e1 and e2 in crop year 2009. only the cultivars brs tangará (e1 and e2) and pampeano (e3 and e4) kept association consistency to traditional and optimized levels, in both years. biplot techniques are efficient to indicate more adapted cultivars to levels of crop management in wheat.