Effects of different intensities of water deficit stress on quantitative and qualitative traits in Canola (Brassica napus L.)

For appoint of resistance to drought stress two cultivars of autumnal Rapeseed survey of component of their function, examination in case of split plot in form of complete basis project block in three repetitions that which the irrigation was the main factor in seven levels and also the accessory factor in two levels consist of Zarfam & Opera varieties. Examinant in 2005-2006 cropping season to executed in farm of Seed & Plant Improve Institute, Karaj. The results showed that the effect of variety on the seed yield, seed oil yield,seedoil percent (1%) and 1000 seed weight(5%) became meaningful and also mutual effects of irrigation and variety on attributes number of fructify in the secondary branch, the number of seed in fructify and 1000 seed weight effect meaningfully (5%). in conditions of drought stress the most Seed yield was to Zarfam variety (5133KG in hectare) in conditions of cutting irrigation in stage of tillering and flowering and the least yield to Opera variety allocated in conditions and of cutting irrigation in stage of flowering.Results of correlation studies indicated that seed oil yield had a positive and Significant in the level 1% with Seed oil percent, the number of seed in fructify., The height correlation was determined between seed yield and oil yield (r = 0.99).