Effective Selection Criteria for Screening Drought Tolerant and High Yielding Bread Wheat Genotypes

Bennani, Sahar; Nsarellah, N.; Birouk, A.; Ouabbou, H.; Tadesse, Wuletaw

doi:10.13189/ujar.2016.040404

Cited by 17 publications

(11 citation statements)

References 31 publications

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“…(2018) in which they reported that DSI and STI indices were most useful to identify genotypes differing in their response to drought. The high GY under WD and WW conditions, in some genotypes, supported by the results of other researchers (Bennani et al., 2016; Kandic et al., 2009; Mujtaba et al., 2018) in which they reported that some of the genotypes that performed well under optimum conditions (WW) also performed well under WD.…”

Section: Discussionsupporting

confidence: 77%

“…For example, late flowering and taller genotypes tend to produce higher GY under WW conditions; in contrast, under WD conditions, earlier and shorter wheat genotypes tend to produce higher GY. The previous results indicated that some genotypes can partially avoid drought stress at the most critical growth stages by flowering earlier (Bennani et al., 2016; Kandic et al., 2009; Sharma et al., 2008). Therefore, growing dwarf and semi‐dwarf wheat cultivars under drought conditions could result in extremely short plants that might not be suitable for machine harvesting.…”

Section: Discussionmentioning

confidence: 94%

“…Because the 2,100 genotypes evaluated in this study were introduced from several geographic regions, some of them were poorly adapted to the testing environments and produced non-economically acceptable GY. Thus, low-yielding genotypes were eliminated, using ers (Bennani et al, 2016;Kandic et al, 2009;Mujtaba et al, 2018) in which they reported that some of the genotypes that performed well under optimum conditions (WW) also performed well under WD. the GY when compared to PH under WD.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Imposing water deficit on modern and wild wheat collections to identify drought‐resilient genotypes

Morsy

Elbasyoni

Abdallah

et al. 2021

J Agronomy Crop Science

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Breeding for drought tolerance is the most effective approach to mitigate drought effects. The prime goal of the current study was to identify potentially drought‐tolerant wheat (Triticum aestivum L.) genotypes. Therefore, an extensive collection of wheat genotypes (2,100) was evaluated under two water regimes, that is water deficit (WD, 50% ETc ‘crop Evapotranspiration’) and well‐watered (WW, 100% of ETc) across several environments in Egypt. The number of days to flowering (NDF), plant height (PH) and grain yield (GY) were recorded under both water regimes across environments. Additionally, three yield‐based drought indices and water‐use efficiency (WUE) were calculated for the top 30% yielding genotypes (that produced economical GY; 3.58 ton ha−1 for WD and 7.5 ton ha−1 for WW). The results indicated a significant effect for environments, water stress, and genotypes, as well as the second‐ and third‐order interactions across all traits. WD significantly reduced PH, NDF, and GY by 5.0 cm, 10.6 days and 50.0%, respectively. PH, NDF and GY were highly correlated. However, the direction and magnitude of correlation under normal conditions were different from those under WD. For example, under WW conditions, late flowering and taller genotypes tended to produce higher GY. In contrast, under WD, earlier and shorter wheat genotypes tended to produce higher GY. According to the drought tolerance index (DTI), 254 genotypes were considered drought tolerance (DTI > 1). Based on WUE, DTI and GY under WD, 80 genotypes outperformed the commercially grown Egyptian cultivars. Our results implied that the evaluated collection might be a valuable source not only for drought‐tolerant genotypes but also for highly yielding water‐efficient genotypes under favourable conditions in Egypt and similar geographic regions.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

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Imposing water deficit on modern and wild wheat collections to identify drought‐resilient genotypes

Morsy

Elbasyoni

Abdallah

et al. 2021

J Agronomy Crop Science

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“…For drought tolerance that could be drought tolerance per se (direct selection) or a related trait(s) (indirect selection) that is more heritable or easier to identify. Generally, breeding for improved drought tolerance in cereals must be combined with good yield potential [98] because there are occasional seasons with above-average moisture. From these crosses, plant breeders select elite progeny for drought tolerance.…”

Section: Advances In Breeding For Drought Tolerancementioning

confidence: 99%

Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

Sallam

Alqudah

Dawood

et al. 2019

IJMS

464

312

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Climate change is a major threat to most of the agricultural crops grown in tropical and sub-tropical areas globally. Drought stress is one of the consequences of climate change that has a negative impact on crop growth and yield. In the past, many simulation models were proposed to predict climate change and drought occurrences, and it is extremely important to improve essential crops to meet the challenges of drought stress which limits crop productivity and production. Wheat and barley are among the most common and widely used crops due to their economic and social values. Many parts of the world depend on these two crops for food and feed, and both crops are vulnerable to drought stress. Improving drought stress tolerance is a very challenging task for wheat and barley researchers and more research is needed to better understand this stress. The progress made in understanding drought tolerance is due to advances in three main research areas: physiology, breeding, and genetic research. The physiology research focused on the physiological and biochemical metabolic pathways that plants use when exposed to drought stress. New wheat and barley genotypes having a high degree of drought tolerance are produced through breeding by making crosses from promising drought-tolerant genotypes and selecting among their progeny. Also, identifying genes contributing to drought tolerance is very important. Previous studies showed that drought tolerance is a polygenic trait and genetic constitution will help to dissect the gene network(s) controlling drought tolerance. This review explores the recent advances in these three research areas to improve drought tolerance in wheat and barley.

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“…Grain weight Sharma et al (2008); Sareen et al (2012), Bennani et al (2016) b. Grain filling rate and duration Nawaz et al (2013), Khan and Kabir (2014), Song et al (2015) c. Number of fertile spikes Khan and Kabir (2014), Bennani et al (2016) 3.2.1 Conserving soil moisture A continuous supply of water is necessary for sustaining the grain-filling rate and duration, and grain size in wheat. This could not be possible in rain-fed wheat growing area, but here, mulching can be the best option for maintaining optimum moisture and thermal regimes in the soil system.…”

Section: Agronomic Managementmentioning

confidence: 99%

Heat stress effects and management in wheat. A review

Akter

Islam

2017

Agron. Sustain. Dev.

344

195

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Increasing temperature and consequent changes in climate adversely affect plant growth and development, resulting in catastrophic loss of wheat productivity. For each degree rise in temperature, wheat production is estimated to reduce by 6%. A detailed overview of morpho-physiological responses of wheat to heat stress may help formulating appropriate strategies for heat-stressed wheat yield improvement. Additionally, searching for possible management strategies may increase productivity and sustainability of growing wheat. The major findings from this review are as follows: (1) heat stress significantly reduces seed germination and seedling growth, cell turgidity, and plant water-use efficiency; (2) at a cellular level, heat stress disturbs cellular functions through generating excessive reactive oxygen species, leading to oxidative stress; (3) the major responses of wheat to heat stress include the enhancement of leaf senescence, reduction of photosynthesis, deactivation of photosynthetic enzymes, and generation of oxidative damages to the chloroplasts; (4) heat stress also reduces grain number and size by affecting grain setting, assimilate translocation and duration and growth rate of grains; (5) effective approaches for managing heat stress in wheat include screening available germplasm under field trials and/or employing marker-assisted selection, application of exogenous protectants to seeds or plants, mapping quantitative trait locus conferring heat resistance and breeding; (6) a well-integrated genetic and agronomic management option may enhance wheat tolerance to heat. However, the success of applying various techniques of heat stress management requires greater understanding of heat tolerance features, molecular cloning, and characterization of genes. The overall success of the complex plant heat stress management depends on the concerted efforts of crop modelers, molecular biologists, and plant physiologists.

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Effective Selection Criteria for Screening Drought Tolerant and High Yielding Bread Wheat Genotypes

Cited by 17 publications

References 31 publications

Imposing water deficit on modern and wild wheat collections to identify drought‐resilient genotypes

Imposing water deficit on modern and wild wheat collections to identify drought‐resilient genotypes

Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

Heat stress effects and management in wheat. A review

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