Correlated response of morpho-physiological traits of grain yield in durum wheat under normal irrigation and drought stress conditions in greenhouse

Durum wheat performance in the Mediterranean climate is limited when water scarcity occurs before and during anthesis. The present research was performed to determine the effect of drought stress on several physiological and agro-morphological traits in 17 durum wheat genotypes under two conditions (control and drought) over two years. The results of analysis of variance indicated that the various durum wheat genotypes responded differently to drought stress. Drought stress significantly reduced the grain filling period, plant height, peduncle length, number of spikes per plot, number of grains per spike, thousand grains weight, grain yield, biomass, and harvest index in all genotypes compared to the control condition. The heatmap-based correlation analysis indicated that grain yield was positively and significantly associated with phenological characters (days to heading, days to physiological maturity, and grain filling period), as well as number of spikes per plant, biomass, and harvest index under drought conditions. The yield-based drought and susceptible indices revealed that stress tolerance index (STI), geometric mean productivity (GMP), mean productivity (MP), and harmonic mean (HM) were positively and significantly correlated with grain yields in both conditions. Based on the average of the sum of ranks across all indices and a three-dimensional plot, two genotypes (G9 and G12) along with the control variety (G1) were identified as the most tolerant genotypes. Among the investigated genotypes, the new breeding genotype G12 showed a high drought tolerance and yield performance under both conditions. Hence, this genotype can be a candidate for further multi-years and locations test as recommended for cultivation under rainfed conditions in arid and semi-arid regions.

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Early ground cover and other physiological traits as efficient selection criteria for grain yield under moisture deficit stress conditions in wheat (Triticum aestivum L.)

Indian Journal of Plant Physiology ◽

10.1007/s40502-013-0047-6 ◽

2013 ◽

Vol 18 (3) ◽

pp. 277-281 ◽

Cited By ~ 3

Author(s):

Amasiddha Bellundagi ◽

G. P. Singh ◽

K. V. Prabhu ◽

Ajay Arora ◽

Neelu Jain ◽

...

Keyword(s):

Triticum Aestivum ◽

Grain Yield ◽

Selection Criteria ◽

Ground Cover ◽

Triticum Aestivum L ◽

Stress Conditions ◽

Physiological Traits ◽

Moisture Deficit ◽

Efficient Selection ◽

Moisture Deficit Stress

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Assessing Genetic Diversity of Rice Varieties under Drought Stress Conditions

Notulae Scientia Biologicae ◽

10.15835/nsb315618 ◽

2011 ◽

Vol 3 (1) ◽

pp. 114-123 ◽

Cited By ~ 11

Author(s):

Mina ABARSHAHR ◽

Babak RABIEI ◽

Habibollah SAMIZADEH LAHIGI

Keyword(s):

Drought Stress ◽

Grain Yield ◽

Stress Tolerance ◽

Geometric Mean ◽

Minimum Variance ◽

Stress Conditions ◽

Productivity Index ◽

Stress Index ◽

Tolerance Index ◽

Rice Varieties

In order to compare different rice genotypes grown under drought stress conditions a field experiment was conducted. In this study thirty different genotypes of native, breeded and upland cultivars were evaluated. Analysis of variance showed significant differences among genotypes in respect of all vegetative and morphological traits. Genotypes were devided into three groups by cluster analysis based on all studied traits with minimum variance method (Wards Method). The total average indicates significant differences among groups in respect of all morphological and physiological characteristics. In addition, eight drought stress tolerance indices including: sensitivity to stress index (SSI), drought response index (DRI), relative drought index (RDI), tolerance index (TOL), mean productivity index (MP), stress tolerance index (STI), geometric mean productivity index (GMP) and harmonic mean index (HM) were calculated according to their grain yield under drought stress and normal conditions. In general, results of this experimnet revealed that, among rice cultivars Domsephid, Deylamany, Hasansaraei, Sadri, Anbarboo and Domsiah had the highest sensitivity referring to drought stress and produced the lowest grain yield. Also, genotypes of IR24 (breeded of IRRI), Nemat, Sephidroud, Kadoos and Bejar (breeded of Iran) and Vandana, upland cultivar (originally from India) had the highest tolerance to drought stress and produced the highest grain yield. In conclusion, it was suggested that, these cultivars are suitable for drought stress conditions and are appropriate for hybridization with the aim of increasing drought tolerance.

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