Evaluation of Yield and Agronomic Traits in Canola cultivars Under Drought Stress Condition Using Multivariate Statistical Methods

To study the yield and agronomic traits in canola variety under drought stress condition، an experiment was conducted base randomized complete block design (RCBD) with three replications in researching farm of Karaj branch، Islamic Azad University in agriculture year 2010-2011. Investigated traits including kernel yield، days to physiological maturity، days to fifty percent flowering، pod number in main stem، plant height، biological yield، pod length، kernel number in pod، thousand kernel weight، leaf length، leaf width، pod weight and lateral branch. The variance analysis of the studied traits showed that for all traits among studied cultivars there is a significant difference. The most amount of seed yield was for Sarigol and after that SLMO46 and Golden 13 cultivars had more excellence. Also the results of stepwise regression showed that biologically yield، pod weight and the number of pods in main stem had more effect on the yield. In factor analysis، five firs factors justified more than 77 percent of data variance. In firs factor leaf length and leaf width، in second factor biologic yield and seed yield، in third factor the number of days to 50 percent of flowering and the number of day to physiological maturity، and in forth factor number of lateral branch trait and in fifth factor the number of seeds per pod had the most effect.