Effects of Water Deficit on Drought Tolerance Indices of Sesame (Sesamum indicum L.) Genotypes in Moghan Region

Context: Evaluation of tolerance of different barley genotypes to drought stress, an experiment carried out in randomized block design (RCBD) with three replication during 2009-2010 growing seasons and 20 barley genotypes were studied in normal and water deficit in post anthesis stage conditions at the Saatloo Research Farm Azerbaiejan, Iran. Results: The result of variance analysis showed that there were highly significant differences between genotypes in all of the studied traits, also it was cleared that all of traits except spike length reduced in water deficit condition as compared to normal condition and seed yield, biomass and 1000 seed weight traits had the most reduction (31, 25 and 20 percent, respectively). To identify of tolerance barley genotypes to drought stress, drought tolerance indices (STI, TOL, SSI, MP, HM and GMP), correlation coefficients, principal components analysis and cluster analysis were used. The result of correlation coefficients indicated that there were significant and positive correlation between seed yield in normal and stress conditions and drought tolerance indices. Also the result of principal components analysis showed that two components justified 99% of total variations. MP, GMP, STI and HM indices and TOL and SSI indices had the most coefficients in the first and second component, respectively, so are named tolerance and sensitivity component, respectively. Conclusion: MP, HM, STI and GMP indices were appropriate indices to select of drought tolerance barley genotypes. On the other hand, the result of cluster analysis showed that 13, 14 and 7 genotypes and 18, 1 and 2 genotypes were tolerance and sensitivity genotypes to water deficit at post anthesis stage. DOI: http://dx.doi.org/10.3329/jbs.v21i0.22525 J. bio-sci. 21: 109-122, 2013

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Water deficit stress tolerance assessment in barley cultivars using drought tolerance indices

10.21203/rs.3.rs-1088066/v1 ◽

2021 ◽

Author(s):

Md Habib ◽

Md Mannan ◽

Md Karim ◽

Md Miah ◽

Hari Singh

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Grain Yield ◽

Stress Tolerance ◽

Water Deficit ◽

Geometric Mean ◽

Research Work ◽

Tolerance Index ◽

Drought Tolerance Indices ◽

Tolerance Indices

Abstract Crop productivity is greatly affected by drought stress. Understanding the drought tolerance capability of the crop varieties available in a country is the foremost consideration for drought adaptation. The objective of this research work was to examine the drought tolerance potentiality of 5 cultivated barley varieties (BARI Barley5, BARI Barley6, BARI Barley7, BARI Barley8 and BARI Barley9) through calculating drought tolerance indices. A completely randomized design (CRD) with three replications was followed in the experiment, where crops were grown under control (80% of FC) and water deficit environment (50% of FC). Stress Tolerance (TOL), Mean Productivity (MP), Geometric Mean Productivity (GMP), Stress Susceptibility Index (SSI), Stress Tolerance Index (STI), Harmonic Mean (HAM), Yield Index (YI) and Yield Stability Index (YSI) were calculated based on grain yield under control and drought conditions. BARI Barley7 and BARI Barley8 were the most tolerant variety and BARI Barley9 considered as susceptible based on TOL and SSI. Drought tolerance indices like MP, HAM, GMP, TOL as well as STI were showed a high correlation with grain yield under both conditions and were recognized as appropriate indices to identify varieties with high grain yield and low sensitivity to drought stress.

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Evaluation of Water Deficit Stress Tolerance in Populations of Fennel (Foeniculum vulgare M.) Using Drought Tolerance Indices

Journal of Crop Breeding ◽

10.29252/jcb.11.30.118 ◽

2019 ◽

Vol 11 (30) ◽

pp. 118-125

Author(s):

Milad Ghasemi ◽

Saeid Aharizad ◽

Ali Bandehagh ◽

Majid Norouzi ◽

Roghayeh Azhdari ◽

...

Keyword(s):

Drought Tolerance ◽

Stress Tolerance ◽

Water Deficit ◽

Water Deficit Stress ◽

Foeniculum Vulgare ◽

Drought Tolerance Indices ◽

Tolerance Indices

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Screening Wheat Landrace Varieties for Grain Yield under Water Deficit Conditions Using Drought Tolerance Indices

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2014/8937 ◽

2014 ◽

Vol 3 (6) ◽

pp. 763-776

Author(s):

Zahed Khaledian

Keyword(s):

Drought Tolerance ◽

Grain Yield ◽

Water Deficit ◽

Wheat Landrace ◽

Drought Tolerance Indices ◽

Tolerance Indices

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Identification of Drought-Tolerant Co-canes Based on Physiological Traits, Yield Attributes and Drought Tolerance Indices

Sugar Tech ◽

10.1007/s12355-021-00967-7 ◽

2021 ◽

Author(s):

Pooja Dhansu ◽

Neeraj Kulshreshtha ◽

Ravinder Kumar ◽

Arun K. Raja ◽

S. K. Pandey ◽

...

Keyword(s):

Drought Tolerance ◽

Physiological Traits ◽

Yield Attributes ◽

Drought Tolerant ◽

Drought Tolerance Indices ◽

Tolerance Indices

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Discrimination of drought tolerance in a worldwide collection of safflower (Carthamus tinctorius L.) genotypes based on selection indices

Acta agriculturae Slovenica ◽

10.14720/aas.2021.117.1.1656 ◽

2021 ◽

Vol 117 (1) ◽

pp. 1

Author(s):

Pooran GOLKAR ◽

Esmaeil HAMZEH ◽

Seyed Ali Mohammad MIRMOHAMMADY MAIBODY

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Geometric Mean ◽

Resistance Index ◽

Stability Index ◽

Carthamus Tinctorius ◽

Tolerance Index ◽

Breeding Programs ◽

Drought Tolerance Indices ◽

Tolerance Indices

Improvement of elite safflower genotypes for drought-tolerance is hampered by a deficiency of effective selection criteria. The present study evaluated 100 genotypes of safflower in terms of their drought tolerance over a period of three years (2016–2018) under both non-stress and drought-stress conditions. The eight drought-tolerance indices of tolerance index (TOL), mean productivity (MP), geometric mean productivity (GMP), stress susceptibility index (SSI), stress tolerance index (STI), yield stability index (YSI), drought resistance index (DI), and harmonic mean (HARM) were calculated based on seed yield under drought (Ys) and non-drought (Yp) conditions. A high genetic variation was found in drought tolerance among the genotypes studied. The MP, GMP, and STI indices were able to discriminate between tolerant and drought-sensitive genotypes. Plots of the first and second principal components identified drought-tolerant genotypes averaged over the three study years. Cluster analysis divided the genotypes into three distinct groups using the drought tolerance indices. Ultimately, eight genotypes (namely, G3, G11, G13, G24, G33, G47, G58, and G61) from different origins were detected as more tolerant to drought stress suitable for use in safflower breeding programs in drought-affected areas. The most tolerant and susceptible genotypes could be exploited to produce mapping populations for drought tolerance breeding programs in safflower.

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