Analysis of variance carried out for eight quantitative traits of twenty seven genotypes (Fourteen three-way cross hybrids, ten single cross hybrids and three checks), revealed significant genotypic differences in all the four environments for all the traits except number of filled seeds and stem diameter. Genotype x environment interactions were found to be significant for all the six characters considered for stability analysis. The effect due to environment (linear) was significant for days to maturity, head diameter, per cent seed filling, seed yield per hectare and per cent oil content. The variance due to genotype x environment (linear) was non-significant for all the characters except per cent seed filling and seed yield per hectare. Non-linear component was found to be significant for all the traits. Maximum number of genotypes (sixteen out of twenty seven) showed their stability for seed yield per hectare followed by thirteen for oil yield per hectare, twelve for per cent seed filling, eleven for per cent oil content. Among twenty seven hybrids studied, three three-way cross hybrids viz., (234A x 207B) x 6D-1, (851A x 207B) x RHA 274 and (338A x 300B) x RHA-274) and two single cross hybrids 338A x 6D-1 and 851AxRHA-274 were found to be stable for most of the characters including seed yield and oil content. The hybrid (234Ax207B) X 6D-1 was found to be stable for most of the characters.