Evaluation the salt tolerance of alfalfa ecotypes according to tolerance indicator

Document Type : Research Paper


1 Ph. D. Candidate in Crop Physiology, University College of Agriculture and Natural Resources& Tehran University, Karaj, Iran

2 Professor, University College of Agriculture and Natural Resources& Tehran University, Karaj, Iran


Salinity is the most important abiotic stress that influences the crops production in large areas of the country. To evaluate the salt tolerance of different alfalfa ecotypes, an experiment was conducted with three replications in a factorial randomized complete block design in 2014, in College of Agricultural and Natural Resources University of Tehran. 25 alfaalfa ecotypes in hydroponics (Hoagland solution) condition and applied salinity levels 100 and 200 mM sodium chloride with irrigation water were examined. The results indicated that the interaction of salinity and different ecotypes was significant on shoot dry weight, concentration of sodium and potassium. To determine tolerant and sensitive ecotypes indicators of stress were used and the results showed that in non-stress condition yield to MP (mean productivity), TOL (Tolerance), STI (stress tolerance index) indicators and in salt stress yield to MH (Harmonic mean), STI, YI (Yield index) had positively significant correlation. According to this ecotypes 5 and 21 as the most tolerant and ecotype 20 and 8 as more sensitive were introduced. The result of the Biplot analysis showed that the first and second principal components justified 87/15 precent of the whole yield changes. Hence, the selection due to the first and second principal components respectively led to choose the tolerant and sensitive ecotypes.


Main Subjects

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Volume 48, Issue 2 - Serial Number 2
September 2017
Pages 579-589
  • Receive Date: 06 January 2017
  • Revise Date: 18 July 2017
  • Accept Date: 18 July 2017
  • Publish Date: 23 August 2017