Desempenho agronômico de linhagens e cultivares de soja frente a doenças foliares

The programs of soybean breeding have sought to develop, over the years, more productive and more disease resistance cultivars. The objective of this study was to evaluate soybean cultivars and lines for agronomic characteristics and severity of foliar diseases. The experiment was conducted at the Federal University of Rondonia, in Moura-RO, the harvest 2007/2008 in dystrophic Typic. The experimental design was randomized blocks, evaluating 25 strains and five as control (Warranty, Chapadoes, Luziania, Msoy Msoy 8411 and 8914), with four replications. , Plant height at flowering and maturity, height of the first pod; lodging; leaf retention, productivity and number of days to flowering and maturity: the agronomic characteristics were evaluated. For diseases were evaluated septoria (Septoria glycines), the stain-eye frog (frogeye leaf spot) and target spot (Corynespora cassiicola), determining the severity. As for soybean rust (Phakopsora pachyrhizi), the behavior of genotypes to aggressiveness is noted. As they have good agronomic characteristics and low severity as to foliar diseases, UFUS 3, UFUS 6, 7 UFUS, UFUS 11, UFUS 14, 16 and UFUS UFUS 17 lines appear as the most promising materials for cultivation in the region of Rolim Moura-RO.