Abstract
Abstract Drought tolerance is a highly complex trait and one of the important components of yield stability in wheat. An experiment was therefore conducted to study the drought tolerance status of 14 high-yielding wheat varieties based on morphological characteristics under a randomized complete block design following factorial arrangement with three replications. Variety × Treatment × Year interactions of wheat genotypes were studied for various morphological traits under normal and drought stress conditions for 2 years in plants grown in pots. Significant differences were observed among the 14 varieties of wheat. Sutlej-86 was found to be highly affected by drought, with maximum reductions in plant height, spike length and number of spikelets/spike. The variety with the maximum tolerance to drought was Bahawalpur-97; this variety also had the lowest reductions in the number of fertile tillers/plant, the number of spikelets/spike, spike weight, the number of grains/spike, 1000-grain weight, grain yield/spike, total biomass and stress susceptibility and tolerance indices. Stronger correlations among the studied attributes under drought stress over normal conditions further highlighted drought stress adversities. The studied traits are thus recognized as drought tolerance indicators for varietal selection, and varieties showing less reduction under drought could be used as a standard check in breeding programmes to identify lineages with drought tolerance and could be recommended for drought-stressed areas.
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Claims 6
Claim · model-written summary
The 14 wheat varieties differed significantly.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- differencese0
- Value
- 14e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were observed among the 14 varieties of wheat”
Claim · model-written summary
Sutlej-86 had the greatest drought reductions in height, spike length and spikelets per spike.
- Taxon
- wheatTriticum aestivumt0
- Material
- Sutlej-86e0
- Treatment
- droughte0
- Outcome
- plant height, spike length and number of spikelets/spikee0
- Direction
- maximum reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sutlej-86 was found to be highly affected by drought, with maximum reductions in plant height, spike length and number of spikelets/spike”
t0“wheat (Triticum aestivum L.)”
Claim · model-written summary
Bahawalpur-97 had the highest drought tolerance.
- Taxon
- wheatTriticum aestivumt0
- Material
- Bahawalpur-97e0
- Outcome
- maximum tolerance to droughte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The variety with the maximum tolerance to drought was Bahawalpur-97”
t0“wheat (Triticum aestivum L.)”
Claim · model-written summary
Bahawalpur-97 had the smallest declines across tiller, spike, grain and biomass traits and stress indices.
- Taxon
- wheatTriticum aestivumt0
- Material
- Bahawalpur-97e1
- Treatment
- droughte1
- Outcome
- number of fertile tillers/plant, the number of spikelets/spike, spike weight, the number of grains/spike, 1000-grain weight, grain yield/spike, total biomass and stress susceptibility and tolerance indicese0
- Direction
- lowest reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this variety also had the lowest reductions in the number of fertile tillers/plant, the number of spikelets/spike, spike weight, the number of grains/spike, 1000-grain weight, grain yield/spike, total biomass and stress susceptibility and tolerance indices”
e1“The variety with the maximum tolerance to drought was Bahawalpur-97”
t0“wheat (Triticum aestivum L.)”
Claim · model-written summary
Correlations among traits were stronger under drought than normal conditions.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- drought stresse0
- Outcome
- correlations among the studied attributese0
- Direction
- Strongere0
- Comparator
- normal conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stronger correlations among the studied attributes under drought stress over normal conditions”
t0“wheat (Triticum aestivum L.)”
Claim · model-written summary
The authors identify the traits as selection indicators and recommend low-reduction varieties as breeding checks for drought areas.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- standard check in breeding programmese0
- Qualifier
- drought-stressed arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The studied traits are thus recognized as drought tolerance indicators for varietal selection, and varieties showing less reduction under drought could be used as a standard check in breeding programmes to identify lineages with drought tolerance and could be recommended for drought-stressed areas”
t0“wheat (Triticum aestivum L.)”
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