Adaptabilidade e estabilidade em cultivares de sorgo

Abstract

Information about cultivars behavior obtained from only one local and year may not be enough for a cultivar recommendation due to the genotype x environment interaction occurrence. Then, cultivars indication based on stability and repeatability is more consistent because it enables previewing theirs performance under many environments. This work studied the adaptability and repeatability of dry matter production of seven sorghum cultivars to be used as silage. Data came from two sites (Coronel Pacheco and Lavras, Minas Gerais) and were obtained during two years (1997/98 and 1998/99) using a casual block with three replications design. Cultivar AG 2002 was recommended because showed the best productivity, good performance preview and was the cultivar that approached more to the ideal standard. Also, Volumax cultivar may be recommended due to its good performance when growing in favorable environments.