Heat stress in wheat and interdisciplinary approaches for yield maximization

Hussain, Sajjad; Jamil, Muhammad; Napar, Abdul Aziz; Rahman, Rida; Bano, Asghari; Afzal, Fakiha; Gul, Alvina; Mujeeb‐Kazi, A.

doi:10.1002/9781119081005.ch9

Cited by 10 publications

(4 citation statements)

References 121 publications

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“…Projected climate changes for Bangladesh include more erratic rainfall resulting in increasing droughts, especially in drier northern and western regions of the country [ 13 ]. This predicted drought severity will constrain wheat cultivation and productivity in the future due to the lack of drought-tolerant varieties since the modern wheat varieties are not sufficiently tolerant against abiotic stresses [ 14 ]. Therefore, the effort ought to be made to minimize the yield reduction by screening or developing drought-tolerant wheat varieties.…”

Section: Introductionmentioning

confidence: 99%

Multivariate Analysis of Morpho-Physiological Traits Reveals Differential Drought Tolerance Potential of Bread Wheat Genotypes at the Seedling Stage

Mohi-Ud-Din

Hossain

Rohman

et al. 2021

Plants

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Drought is one of the foremost environmental stresses that can severely limit crop growth and productivity by disrupting various physiological processes. In this study, the drought tolerance potential of 127 diverse bread wheat genotypes was evaluated by imposing polyethylene glycol (PEG)-induced drought followed by multivariate analysis of several growth-related attributes. Results showed significant variations in the mean values of different morpho-physiological traits due to PEG-induced drought effects. Correlation analysis revealed that most of the studied traits were significantly correlated among them. The robust hierarchical co-clustering indicated that all the genotypes were clustered into four major groups, with cluster 4 (26 genotypes) being, in general, drought-tolerant followed by cluster 1 (19 genotypes) whereas, cluster 2 (55 genotypes) and 3 (27 genotypes) being drought-sensitive. Linear discriminant analysis (LDA) confirmed that around 90% of the genotypes were correctly assigned to clusters. Squared distance (D2) analysis indicated that the clusters differed significantly from each other. Principal component analysis (PCA) and genotype by trait biplot analysis showed that the first three components accounted for 71.6% of the total variation, with principal component (PC) 1 accounting for 35.4%, PC2 for 24.6% and PC3 for 11.6% of the total variation. Both PCA and LDA revealed that dry weights, tissue water content, cell membrane stability, leaf relative water content, root-shoot weight ratio and seedling vigor index played the most important discriminatory roles in explaining drought tolerance variations among 127 wheat genotypes. Our results conclude that the drought-tolerant and -sensitive wheat genotypes identified in this study would offer valuable genetic tools for further improvement of wheat productivity in arid and semi-arid regions during this time of unpredictable climate change.

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Section: Introductionmentioning

confidence: 99%

Multivariate Analysis of Morpho-Physiological Traits Reveals Differential Drought Tolerance Potential of Bread Wheat Genotypes at the Seedling Stage

Mohi-Ud-Din

Hossain

Rohman

et al. 2021

Plants

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“…Although, development of wheat varieties tolerant to diverse stress is time-consuming and also needs sophisticated knowledge [112]. Therefore, scientists suggested several stress tolerance indices (STIs) which are linked with agronomic parameters [16,113]. These STIs are stress susceptibility index (SSI) [114], geometric mean productivity (GMP) [115], mean productivity (MP) [116], stress tolerance (TOL) [117] and STI [118] that can be useful for documentation of stress tolerance crops cultivars with high-yield ability.…”

Section: Stress Tolerance Indices Could Be Used Effectively For the Smentioning

confidence: 99%

Wheat (Triticum aestivumL.) in the Rice-Wheat Systems of South Asia Is Influenced by Terminal Heat Stress at Late Sown Condition: A Case in Bangladesh

Hossain¹,

Islam²,

Islam³

2021

Plant Stress Physiology

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Wheat plays an important role in attaining food and nutritional security in Bangladesh after rice. The demand of wheat has been increasing every year at the rate of 13% due to rapid changes in dietary habits, socio-economic upliftment, enhancement of per capita income, etc. Bangladesh Wheat and Maize Research Institute (BWMRI) has already released 34 high yielding, disease-resistant, and abiotic stress-tolerant wheat varieties, and improved management practices to the farmers. Although all the released varieties have climatic yield potential as high as 6.0 t ha −1 with the attainable average yield is 4.0-4.5 t ha −1 , the national average yield in farmers' field is only 3.49 t ha −1 ; it is specified that there is a huge yield gap existing among potential, attainable and actual yields. One of the most important reasons for this yield gap of wheat is the terminal high temperature stress (HS) in late sowing wheat. Generally, farmers in Bangladesh are sowing wheat lately due to delay in sowing monsoon rice and subsequent late harvest of the rice; as a result, late sown wheat faces terminal HS at reproductive stage. The chapter highlighted the consequences of terminal HS on wheat and potential approaches to mitigate the stress in Bangladesh.

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“…The anticipated intensity of the drought is projected to have a constraining effect on the cultivation and yield of wheat. This is mainly owing to the absence of drought-tolerant wheat varieties, as the current ones are not equipped to withstand abiotic stress (Hussain et al, 2016). Therefore, implementing screening or cultivating drought-tolerant wheat varieties is expected to mitigate the negative impact on crop yield.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the performance of diverse wheat genotypes under arid climatic conditions

Ijaz,

Shah,

Ul-Allah

et al. 2024

Preprint

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In present study, twenty different wheat varieties were evaluated for various agronomic traits including plant height, number of tellers per plant, leaf area index, spike length, number of spikelets per spike, number of grains per spike, peduncle length, chlorophyll index, thousand-grain weight, grain yield, and biological yield at the research area of Agronomy, Hafiz Abad Research Station, College of Agriculture B.Z.U. Bahadur Campus Layyah during crop season 2020-2021 and 2021-2022. The study was designed following RCBD (Randomized Complete Block Design) with 3 replications of each treatment. Each plot in the study was 4 meters in length and 5 meters in width. The wheat genotypes that were evaluated exhibited significant variability for all of the attributes under investigation. Grain yield was significantly correlated with the spike length, number of spikelets per spike, plant height, 1000-grain weight, number of grains per spike and flag leaf area. Multivariate analysis showed that 20 different wheat varieties formed 3 different clusters. Cluster-1 showed maximum mean values for yield and yield-related attributes compared with cluster-2 and cluster-3. The genotypes accounted for 95% of the total variation in grain yield and associated characteristics, accounting for a significant proportion of the overall differences. In general, the results of this study showed that genotypes like FSD-08, Ujala-16, Fakhr-e-Bhakhar-19, and Akbar-19 have the highest yield potential when grown in the semi-arid climate of Layyah, Pakistan. Thus, all these genotypes were suggested for general cultivation in arid conditions of district Layyah.

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Heat stress in wheat and interdisciplinary approaches for yield maximization

Cited by 10 publications

References 121 publications

Multivariate Analysis of Morpho-Physiological Traits Reveals Differential Drought Tolerance Potential of Bread Wheat Genotypes at the Seedling Stage

Multivariate Analysis of Morpho-Physiological Traits Reveals Differential Drought Tolerance Potential of Bread Wheat Genotypes at the Seedling Stage

Wheat (Triticum aestivumL.) in the Rice-Wheat Systems of South Asia Is Influenced by Terminal Heat Stress at Late Sown Condition: A Case in Bangladesh

Evaluating the performance of diverse wheat genotypes under arid climatic conditions

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