Screening Drought-Tolerant Genotypes in Chickpea using Stress Tolerance Score (STS) Method
Journal: International Journal of Advanced Biological and Biomedical Research (Vol.3, No. 1)Publication Date: 2015-01-01
Authors : Moein Rezai; Akbar Shabani; Shahram Nakhjavan; Alireza Zebarjadi;
Page : 119-128
Keywords : Biplot; Chickpea; Drought indices; Grain yield; Stress Tolerance Score (STS);
Abstract
Objective: In order to study genetic variation and effect of drought stress on grain yield and some morphological traits in chickpea, an experiment was conducted on 64 genotypes during 2013-2014 cropping season at deputy of Kermanshah Sararood Dry Land Agricultural Research Institute, located on the western part of Iran. Methods: The experimental design was a randomized lattice design with tow replications under two complementary irrigation and dryland conditions. Six drought tolerance indices including stress tolerance index (STI), geometric mean productivity (GMP), mean productivity index (MP), stress susceptibility index (SSI), tolerance index (TOL), harmonic mean productivity (HMP), were calculated and adjusted based on grain yield under drought (Ys) and irrigated conditions (Yp). Results: Results of ANOVA under two complementary irrigation and dryland conditions revealed significant differences among genotypes for YLD, NPMP and NSPP. In dryland condition all of tolerance indices except SSI*TOL have significant negative correlation with SSI index and the rest of indices except TOL*YS, HMP*TOL and YI*TOL show positive correlation. The first two components explained 95.8% of total variation between the data. Based on biplot the genotypes 40 and 63 were superior genotypes under both stress and non-stress conditions. These genotypes had stable performance in the circumstances of low sensitivity to drought stress. Genotypes 29, 55, 56, 57, 45 and 16 had a relatively low yield and they are sensitive to drought stress. In conclusion, this study showed that the effect of drought stress on grain yield was varied which suggested genetic variability for drought tolerance in this materials. Therefore, breeders can select better genotypes based on indices and a combination of different methods of selection.
Other Latest Articles
- Economic Analysis of Horticultural Crop Production at Various Levels of Mechanization (Case Study: Ghazvin Province
- Analysis Students’ Motivation in Vocational Schools and Agricultural Training Centers in Kermanshah Province toward Studying the Field of Agriculture
- The Effect of Field Size and Distance from the Field Center on Neutron Contamination in Medical Linear Accelerator
- Performance Comparison of Gaussian and Elliptic High Pass Filter
- Analyzing the Role of Motivation Factors in Herzberg’s Theory on Teacher’s Job Satisfaction (Case Study: Elementary Schools in Talesh City)
Last modified: 2019-07-05 05:29:36