Identification of canola cultivars with drought tolerance indices

Document Type : Research Paper

Authors

1 Associate Professor, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran

2 Former Graduate Student, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran

3 Professor, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran

Abstract

Abstract
Water deficit is a major problem for the successful production of agricultural products in Iran. This research was conducted to evaluate drought tolerance indices and identifying drought tolerant cultivars of canola. Twenty eight canola cultivars were sassed implementing complete block designs experiments in normal and drought stress conditions at Isfahan University of Technology Research Farm during 2008-2009. Fisher and Maurer Stress Sensitivity Index (SSI), Tolerance Index (TOL), Rosielle and Hamblin Mean Productivity (MP), Geometric Mean Productivity (GMP) and Fernandez Stress Tolerance Index (STI) were used to compare reactions of genotypes in two moisture conditions. Based on correlation of tolerance indices with the grain yield the results showed that STI, GMP, and MP are the most appropriate in selection for drought tolerance. Mean comparison of tolerance and sensitivity indices for canola cultivars showed that based on STI index ‘NK fair’ cultivar was the most tolerance and ‘RPC 2023’ was the most sensitive cultivar to drought stress. According to 3-D plot of Yp, Ys and STI cultivars Nk fair and Oase were identified as high yield under non-stress condition and had relatively good yield under stress condition. These cultivars can be introduced to region with deficit irrigation.
 

Keywords

References

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History

  • Receive Date: 16 December 2013
  • Revise Date: 14 July 2014
  • Accept Date: 18 July 2014
  • Publish Date: 22 December 2014

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