Eight cassava (Manihot esculenta Crantz) clones were evaluated concerning root yields and other traits during three growing seasons (1982/83, 1983/84 and 1984/85), in Campinas, State of São Paulo, Brazil. Field trials were carried out in completely randomized block designs with four replications. The plants were harvested nine months after planting. The clones IAC 59-210 (derived from self-fertilization of 'IAC Mantiqueira'), and IAC 289-70 (obtained from SRT 797 -'Ouro do Vale' x SRT 1 -'Vassourinha Paulista' crossing), were superior for most of the traits studied, when compared to two commercial varieties used as control. IAC 289-70 presented low cooking time, low HCN levels, high harversting index, average yield of 18.7 t/ha and yellow pulp of roots, indicating the presence of carotenoid pigments. 'IAC 59-210' presented the highest average yield (20.6 t/ha).
cassava (Manihot esculenta Crantz); varieties; HCN toxicity; culinary qualities