Evaluation of effect of drought stress on seed yield and water productivity in local and hybrid rice (Oryza sativa L.) varieties

Subject Areas :

Fatemeh kohansal vajargah ¹ , Farzad paknejad ² , Abdul Reza Aghajani ³

1 - Graduated of Agronomy, Islamic Azad University, Karaj Branch. Karaj-Iran.
2 - Associate prof. of Agronomy, Islamic Azad University Karaj Branch, Karaj. Iran.
3 - Young Research Club,Varamin-Pishva Branch,Islamic Azad University,Varamin-Pishva, Iran.

Received: 2012-12-10 Accepted : 2013-05-14 Published : 2013-11-22

Keywords: Drought stress, Rice, Reproductive, Submerge, Vegatative,

Abstract :

In order to Evaluate effect of drought stress on Seed yield and water productivity in local and hybridrice(Oryza sativa L.) varieties factorialexperiment on the base of completely randomized designin 1389in pot conditions.15 varieties of rice include local and breeding varieties in 3 irrigation conditions submerge, stress in vegetative stage and stress in reproductive stage were studied in four replication.Results of analysis of variance showed that interaction effects between irrigation and varieties for total characteristics 1% levels of probability. Results of mean comparison showed that highest seed yield was belonged to Sepidrood (65.18 gr.pot) and Hybrid (64.63 gr.pot) cultivars in submerge condition, Mohammadi (35.85 gr.pot) andDorfak (32.52 gr.pot) cultivars in vegetative stress condition, Mohammadi (37.51 gr.pot) and Sahel (32.48 gr.pot) cultivars in reproductive stress condition.seed water productivity and total water productivity in stress in vegetative stage and stress in reproductive stage, Mohammadi cultivar was resistance cultivar todrought stress.