Journal of Food, Agriculture and Environment

Evaluation of drought tolerance in lentil advanced genotypes in Ardabil region, Iran

Author(s):

Shahram Azizi Chakherchaman ^1*, Hossein Mostafaei ², Leila Imanparast ³, Mohammad Reza Eivazian ⁴

Recieved Date: 2009-06-17, Accepted Date: 2009-09-10

Abstract:

This experiment evaluated the performance response of 12 lentil genotypes in a randomized complete block design with three replications under stress rain-fed and non-stress irrigated conditions in Ardabil, Iran. Combined analysis of variance revealed significant genetic variation among the genotypes for all measured traits. Mean comparisons showed that ILL-6031, ILL-9893 and ILL-8095 genotypes produced higher seed yield. These genotypes had higher values of harvest indices, seed number per pod, biological yield, pod number per plant and plant height than the other genotypes studied. They were early maturing types. Moreover there were significant positive correlation between seed yield with harvest index, biological yield, fertile pod number per plant and plant height. It was also found that the correlations between seed yield with number of days to 50% flowering and days to maturity were negative and significant. Based on the yields of genotypes under irrigation (YP) and rain-fed (YS) conditions, several quantitative drought tolerance indices, mean productivity (MP), tolerance index (TOL), geometric mean productivity (GMP), harmonic mean (HARM), stress susceptibility index (SSI) and stress tolerance index (STI), were used to evaluate drought responses of these genotypes. They showed that correlation coefficients of grain yield with HARM, GMP and STI indices in both environments conditions were positively significant. These indices, thus, differentiated stress intensity response (SI = 0.29) of genotypes under drought stress and non-stress conditions. According to the indices, it is concluded the three above mentioned genotypes were more drought tolerant than the others.

Keywords:

Drought stress, sensitivity, tolerance indices, lentil, yield

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Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 3&4
Category: Agriculture
Pages: 283-288

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