Abstract
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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Claims 10
Claim · model-written summary
Durum wheat genotypes differed in drought response.
- Taxon
- durum wheat
Triticum turgidum subsp. durume0 - Outcome
- responded differently to drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“various durum wheat genotypes responded differently to drought stress”
Claim · model-written summary
Drought significantly reduced grain filling period, plant height and peduncle length.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Treatment
- Drought stresse0
- Outcome
- grain filling period, plant height, peduncle lengthe0
- Direction
- reducede0
- Comparator
- control conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
Claim · model-written summary
Drought significantly reduced spikes per plot, grains per spike and thousand grain weight.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Treatment
- Drought stresse0
- Outcome
- number of spikes per plot, number of grains per spike, thousand grains weighte0
- Direction
- reducede0
- Comparator
- control conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
Claim · model-written summary
Drought significantly reduced grain yield, biomass and harvest index.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Treatment
- Drought stresse0
- Outcome
- grain yield, biomass, and harvest indexe0
- Direction
- reducede0
- Comparator
- control conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
Claim · model-written summary
Grain yield was positively associated with phenological characters under drought.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Organ / stage
- grain filling periode0
- Outcome
- grain yielde0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield was positively and significantly associated with phenological characters (days to heading, days to physiological maturity, and grain filling period)”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
Claim · model-written summary
Grain yield was positively associated with spikes per plant, biomass and harvest index under drought.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Outcome
- grain yielde1
- Setting
- drought conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as well as number of spikes per plant, biomass, and harvest index under drought conditions”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
e1“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”
Claim · model-written summary
STI, GMP, MP and HM correlated positively with yields under control and drought.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- durum wheatt0
- Outcome
- grain yieldse0
- Direction
- positivelye0
- Qualifier
- both conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
Claim · model-written summary
G9 and G12 were identified among the most drought tolerant genotypes.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- G9 and G12e0
- Outcome
- most tolerant genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes (G9 and G12) along with the control variety (G1) were identified as the most tolerant genotypes”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
Claim · model-written summary
G12 showed high drought tolerance and yield in both conditions.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- G12e0
- Outcome
- high drought tolerance and yield performancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the new breeding genotype G12 showed a high drought tolerance and yield performance under both conditions”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
Claim · model-written summary
The authors recommend testing G12 for rainfed cultivation.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Outcome
- recommended for cultivation under rainfed conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes”
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