عنوان مقاله [English]
Pasban Eslam 1*
1-Associate professor in Agricultural and Natural Resources Research Center of East Azerbaijan, Tabriz, Iran
*Corresponding author: email@example.com
Received: 2014.02.17 Accepted: 2014.12.01
In order to evaluate seed yield and its components in fall oilseed rape genotypes under water deficit stress during flowering and seed filling stages, a field experiment was conducted as split plot based on a randomized complete block design with three replications in East Azerbaijan Research Center for Agriculture and Natural Resources during growing season of 2012-2013. The experimental factors were irrigation with three levels including: non-stressed and drought stress during flowering and seed filling stages (reducing the irrigation for one time in comparison with control treatment) and 18 fall oilseed rape genotypes. The results indicated that water deficit significantly decreased plant height. Occurring drought at flowering stage, led to significant decrease in pod length, number of pods per plant and seed yield. Water deficit stress during flowering decreased seed yield via aborting of pods. Among studied genotypes, significant differences were seen in number of pods per plant and Karaj2, HW101, L72, L183, HW113, Karaj3 and L210 indicated more amounts of pods number of per plant. There are significant and positive correlations among seed yield with number of pods per plant, plant height and pod length, that they showed the importance of these traits in supporting of seed yield. The cluster analysis divided genotypes into 3 categories based on the studied traits. One group consist of L73, L183, L72 and HW101 genotypes in comparison with 2 other groups, indicated the higher amounts of pods per plant and seed yield. These genotypes were more suitable to cultivation in water deficit and normal conditions than others.