In rapeseed(Brassica.napus L)strong heterosis has been reported for seed and agronomic traits. The level of genetic diversity between parents as estimated using isozymic and molecular markers is considered a tool for predicting the hybrid performance and heterosis of crosses. To explore this possibility, GD(genetic distance) on three different level, including morphological, isozymic and RAPD markers, were used to predict the performance of hybrids. Eleven elite rapeseed lines, including 6 maint...