STABILITY AND ADAPTABILITY IN THE YIELD AND REACTION TO SOIL INSECTS IN COMMERCIAL AND EXPERIMENTAL GENOTYPES OF SWEET POTATO

The aim of this study was to estimate the adaptability and stability of sweet potato genotypes evaluated in three environments in the center south state of the Tocantins. The experimental design was a randomized block design with three replications and eighteen treatments, with four cultivars and fourteen experimental clones. Each plot with ten plants was used to evaluate the productivity (t ha(-1)) and reaction of the incidence of damage caused by soil insects (in a scale of the note). For each trait were estimated stability and phenotypic adaptability by the methodology proposed by Lin e Binns (1988) and Carneiro (1998). For productivity the genotypes BD#52, BD#112 and BD#58 were identified as adapted to favorable environments of the evaluation. The genotypes BD#22, BD#58 and BD#106 were more tolerant and adapted to favorable environments for the severity of soil insects. Genotypes BD # 22, # 58 and BD BD # 106 were the best adapted to desfavorable environments.