Evaluation of Spring Wheat Genotypes for Climatic Adaptability using Canopy Temperature as Physiological Indicator

Sohail, Muhammad; Hussain, Imtiaz; Qamar, Maqsood; Tanveer, Sikander Khan; Abbas, Syed; Ali, Zahid; Imtiaz, Muhammad

doi:10.17582/journal.pjar/2020/33.1.89.96

Cited by 13 publications

(20 citation statements)

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“…Dodig et al (2012) and Sareen et al (2014) also inferred related ndings after screening wheat accessions and land races for drought tolerance potential. It is also reported that the tolerant genotypes managed to mitigate drought stress damage by maintaining better leaf water contents, leaf chlorophyll, number of grains per spike and grain weight than others (Slafer et al, 2014;Sohail et al 2019). The results implying that selection for these physio-agronomic traits could signi cantly improve the yields and these parameters should be used as important target traits while screening genotypes for drought tolerance.…”

Section: Discussionmentioning

confidence: 97%

“…The heatmap and ward's hierarchical clustering classi ed SBLs into three distinct clusters, i.e., cluster 1 with negative Z-score (dark blue colour) was comprised of 21 SBLs which showed less mean yield attributes and recognized as drought sensitive lines i.e. SBLs 25,23,19,28,34,39,41,46,47,08,31,43,07,42,14,45,48,33,49,18 tolerant group (Fig. 3).…”

Section: Cluster Analysis and Heat Mapmentioning

confidence: 99%

“…Drought stress at owering stage decrease pollen viability (Dorion et al 1996;Cattivelli et al 2008) which leads to spike sterility (Sohail et al 2019) and low seed setting (Ahmadi and Baker 2001).…”

Section: Introductionmentioning

confidence: 99%

“…To enhance environmental stress tolerance in cultivated wheat cultivars, it is extremely important to assess the diversity in the stress reaction types of wheat germplasm and to identify genotypes with better levels of climatic adaptability. It is also important to identify and describe the various physiological and phenotypic traits involved in tolerance and to identify the genetic components behind tolerance mechanisms (Sohail et al 2019). Since considerable genetic variability for environmental stress tolerance is declining in modern cultivated wheat, exploring of novel diversity is needed to overcome narrow genetic base in wheat.…”

Section: Introductionmentioning

confidence: 99%

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Diversity Among Synthetic Back-Derived Wheat (Triticum Aestivum L.) Lines for Drought Tolerance

Sohail

Qamar

Hussain

2022

Preprint

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Wheat (Triticum aestivum L.) is predominantly growing in areas where terminal drought stress is the foremost yield limiting factor. Since genetic variability for climate resilience is weakened in modern wheat cultivars, exploring drought tolerance potential of the synthetic back-derived wheat lines (SBL) might help to widen genetic diversity for wheat breeders. The variation among 45 selected SBLs in response to drought stress was assessed by measuring physio-agronomic traits. The results showed a significant variation among genotypes under induced drought stress at reproductive stage in comparison to commercial wheat varieties as check. The variability among genotypes was verified by correlations, principal component analysis, heat map and clustering methods using Ward`s method. The study selected 12 synthetic back-derived wheat lines with significantly higher grain yields than 5 local checks under drought stress. The drought tolerance ability of these selected genotypes was strongly associated with proline, leaf water contents, membrane stability and better leaf chlorophyll contents under drought stress. The identified tolerant synthetic back-derived wheat lines may prove useful for wheat breeders to evolve climate resilient wheat varieties.

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Section: Discussionmentioning

confidence: 97%

Section: Cluster Analysis and Heat Mapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diversity Among Synthetic Back-Derived Wheat (Triticum Aestivum L.) Lines for Drought Tolerance

Sohail

Qamar

Hussain

2022

Preprint

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“…Nine genotypes had mean values lower than standard check (Kingbird=3.22 t ha -1 ) for grain yield. Similarly, several authors reported wide range of variation in bread wheat for grain yield (Dargicho et al 2015b;Alemu et al 2019;Sohail et al 2019;Ashebir et al 2020).…”

Section: Spike Character Harvest Index Biomass Yield and Grain Yieldmentioning

confidence: 89%

Assessment of genetic variability among bread wheat genotypes for agronomic and morphological traits under optimum and stress condition

Olbana¹,

Mekbib²,

Tadesse³

2021

Preprint

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Background Bread wheat is one of the most important cereal crops produced in almost all agro-ecologies of Ethiopia. Assessment of genetic variability in crop species is one of the major activities of plant breeding which helps to design breeding methods for further evaluation to meet the diversified goals. Methods The experiment was laid out in 8x8 simple lattice design under both optimum and stress conditions at middle Awash during 2019/20 growing season. Water stressed treatment was imposed by withholding three irrigation from 50% flowering up to physiological maturity. In the non-stressed water regime, plants were watered at every 10 days interval using furrow irrigation method. In order to avoid water leakage between treatments, the non-stressed water regime plots were established four meters away from the water stressed regime plots. Results Analysis of variance revealed highly significant (p ≤ 0.01) variation for all studied traits under both conditions. The variation observed for grain yield varied from 2.30-6.0 t ha− 1 and 1.01–4.36 t ha− 1 under optimum and stress conditions respectively. Genotypic and phenotypic coefficient of variation ranged from 3.88(days to maturity) to 20.84% (grain yield) and 4.76(days to maturity) to 24.73% (fertile tiller plant− 1) under optimum condition respectively. Under stress condition GCV and PCV ranged from 4.30(days to maturity) to 18.41% (fertile tiller plant− 1) and 5.19 (days to maturity) to 22.27% (fertile tiller plant− 1) respectively. Broad sense heritability and genetic advance as a percentage of mean ranged from 43(spike length) to 89% (biomass yield) and 6.51(days to maturity) to 40.33% (grain yield) under optimum condition respectively, whereas under stress condition it ranged from 23.40 (harvest index) to 86.1% (days to heading) and 5.69% (harvest index) to 33.34% (biomass yield) respectively. High heritability coupled with high genetic advance as a percentage of mean was recorded for biomass yield and grain yield under optimum condition, whereas for biomass yield and fertile tiller plant− 1under stress condition. Conclusions According to the mean performance of genotypes G3, G24, G26, G24 and G45 had yield advantage over checks under both conditions. Generally, the variation observed among the tested genotypes confirmed the possibility of improvement through selection and hybridization for the study area.

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Diversity among synthetic backcross-derived wheat (Triticum aestivum L.) lines for drought tolerance

2022

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Evaluation of Spring Wheat Genotypes for Climatic Adaptability using Canopy Temperature as Physiological Indicator

Cited by 13 publications

References 0 publications

Diversity Among Synthetic Back-Derived Wheat (Triticum Aestivum L.) Lines for Drought Tolerance

Diversity Among Synthetic Back-Derived Wheat (Triticum Aestivum L.) Lines for Drought Tolerance

Assessment of genetic variability among bread wheat genotypes for agronomic and morphological traits under optimum and stress condition

Diversity among synthetic backcross-derived wheat (Triticum aestivum L.) lines for drought tolerance

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