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This research aims to identify wheat genotypes that exhibit tolerance to terminal heat stress and understand their adaptive traits.

May 9, 2026Scientific ReportsOpen Access

Integrated morpho-physiological and biochemical responses of wheat genotypes to terminal heat stress and their role in determining grain yield

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This research aims to identify wheat genotypes that exhibit tolerance to terminal heat stress and understand their adaptive traits.
Evaluated 13 wheat genotypes under optimal and heat stress conditions during the grain-filling stage.
Measured morphological, physiological, and biochemical traits, including antioxidant enzyme activities and heat susceptibility index.
Used principal component and biplot analyses to determine key traits associated with heat tolerance.
Identified genotypes TAW 119, DBW 187, and HD 2932 as heat-tolerant with minimal reductions in key yield traits under stress.
Tolerant genotypes maintained higher levels of chlorophyll, antioxidant activities, and water content, contributing to improved grain yield.
Principal component analysis revealed significant trait divergence under heat stress, emphasizing the role of specific biochemical and physiological responses.

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Randomized trial evaluates heat tolerance in wheat genotypes, highlighting key traits for breeding programs.

Jainth et al. (2026) studied this question.

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