Genetic variability of salinity tolerance in spring wheat (<i>Triticum aestivum</i>L.)

Bhutta, Waqas Manzoor; Hanif, Muhammad Usman

doi:10.1080/09064710902893377

Cited by 9 publications

(7 citation statements)

References 16 publications

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“…of grains per spike. Contrasting responses in grain yield per plant and some of its attributes were previously announced for F 1 wheat crosses by Khan et al, (2000), Malik et al, (2005), Iqbal and Khan (2006), Dagustu (2008), Bhutta and Hanif (2010), Ahmad et al, (2011), and Gogas and Koutsika-Sotiriou (2012).…”

Section: Mean Performancementioning

confidence: 74%

Estimates of Heterosis, Combining Ability and Correlation for Yield and its Components in Bread Wheat

Motawea

2017

Journal of Plant Production

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In order to realize the heterosis, general and specific combining ability of wheat, 28 crosses were synthesised in a 8 × 8 by using half diallel mating system, without reciprocals. Analysis of heterosis over mid parents (MP) as well as better parents (BP) and combining ability were conducted for yield and its contributing traits. The experiment was conducted in 2011-2012 and 2012-2013 seasons at the Experimental Farm of Faculty of Agriculture, Sohag University, Egypt. Heterosis was estimated for grain yield per plant revealed maximum heterosis over the mid parents (68.58% and 81.47%) for the crosses P 5 × P 8 and P 5 × P 6, followed by harvest index (53.32%), No. of spikes per plant (33.38%), biological yield per plant (30.71%), spike length (17.29%), 1000 kernel weight (15.13%),grain weight per spike (14.38%) and plant height (5.96%) for the crosses P 7 × P 8 , P 5 × P 8 , P 4 × P 5 , P 4 × P 8 , P 3 × P 4 , P 1 × P 3 and P 7 × P 8 , respectively. The maximum heterobeltiosis was recorded for grain yield per plant (82.56% and 49.3%) for the crosses P 5 × P 8 and P 5 × P 6, followed by harvest index (40.12%), biological yield per plant (28.29%), No. of spikes per plant (16.9%), 1000 kernel weight (14.05%), grain weight per spike (12.9%), spike length (9.53%) and plant height (4.76%)%) for the crosses P 5 × P 8 , P 5 × P 6 , P 2 × P 5 , P 3 × P 4 , P 1 × P 3 , P 2 × P 6 , and P 5 × P 7 , respectively. The results indicated significant differences among the parents for general combining ability and crosses for specific combining ability for all studied traits, which indicated the importance of both additive and non-additive gene effects for these traits. General combining abilities were higher than those of specific combining abilities, then the GCA/SCA ratios were more than unity indicating the prepondorance of additive gene effect which have considerable roles in the inheritance of these traits. In general, The genotypes of P 5 ( Sonora 64 ) confirmed to be good general combiner for plant height, No. of spikes / plant, 1000 -kernel weight, grain weight / spike, biological yield / plant, harvest index, grain yield / plant , and P 4 ( Sahel 1 ) for plant height, spike length, No. of spikes / plant, 1000 -kernel weight, harvest index, grain yield / plant. The crosses P 6 × P 7 , P 5 × P 6 , P 7 × P 8 , P 5 × P 8 , P 2 × P 6 , P 4 × P 8 , were the best specific combiners for grain yield / plant and most of yield components. Grain yield had strong positive correlation with harvest index (0.85), biological yield per plant (0.65) and 1000 -kernel weight (0.59).

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Section: Mean Performancementioning

confidence: 74%

Estimates of Heterosis, Combining Ability and Correlation for Yield and its Components in Bread Wheat

Motawea

2017

Journal of Plant Production

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“…The superior response to selection in F6 compared with F7 and F8 was due to higher phenotypic variation in F6 and also greater selection pressure applied from F6 to F7 that led us to exclude the low potential individuals. Similarly, Venuprasad et al [26], Bhutta and Hanif [27], Green et al [28], Akbarpour et al [18], Okechukwu et al [29], Oyiga et al [12], and Lozada et al [30] elucidated the importance of grain yield and its attributed traits in selection through advanced generations under salinity stress.…”

Section: Discussionmentioning

confidence: 97%

Field Screening of Wheat Advanced Lines for Salinity Tolerance

et al. 2021

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Salinity in soil or irrigation water requires developing genetically salt-tolerant genotypes, especially in arid regions. Developing salt-tolerant and high-yielding wheat genotypes has become more urgent in particular with continuing global population growth and abrupt climate changes. The current study aimed at investigating the genetic variability of new breeding lines in three advanced generations F6–F8 under salinity stress. The evaluated advanced lines were derived through accurate pedigree selection under actual saline field conditions (7.74 dS/m) and using saline water in irrigation (8.35 dS/m). Ninety-four F6 lines were evaluated in 2017–2018 and reduced by selection to thirty-seven F7 lines in 2018–2019 and afterward to thirty-four F8 lines in 2019–2020 based on grain yield and related traits compared with adopted check cultivars. Significant genetic variability was detected for all evaluated agronomic traits across generations in the salt-stressed field. The elite F8 breeding lines displayed higher performance than the adopted check cultivars. These lines were classified based on yield index into four groups using hierarchical clustering ranging from highly salt-tolerant to slightly salt-tolerant genotypes, which efficiently enhance the narrow genetic pool of salt-tolerance. The detected response to selection and high to intermediate broad-sense heritability for measured traits displayed their potentiality to be utilized through advanced generations under salinity stress for identifying salt-tolerant breeding lines.

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“…Effect of salinity stress on plant biomass: Soil salinity caused severe reduction in root and shoot biomass production in crops at early growth stages (Kafi and Rahimi 2011). In wheat and barley, the germination period is known to be more sensitive to salinity stress compared to later growth stages (Bhutta andHanif 2010, Khayatnezhad et al 2010). Maize genotypes were selected from a screening experiment against salinity stress at germination and the genotype EV 1089 was selected as the sensitive one, while the genotype Syngenta 8441 was found as salt tolerant by different germination parameters (Khan et al 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Plant species and even cultivars within species differ in one or more mechanisms; hence, they differ in their response to soil salinity. Many crops, which are reported as salt sensitive at early growth stage, proved to be salt tolerant at the later growth stage (Bhutta andHanif 2010, Khan et al 2015). At the early growth stage, tissues are less developed relative to a mature stage, so plants have no proper mechanisms to exclude toxic ions.…”

Section: Introductionmentioning

confidence: 99%

Silicon nutrition mitigates salinity stress in maize by modulating ion accumulation, photosynthesis, and antioxidants

Khan¹,

Aziz²,

Maqsood³

et al. 2018

Photosynt.

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Silicon is known to improve resistance against salinity stress in maize crop. This study was conducted to evaluate the influence of silicon application on growth and salt resistance in maize. Seeds of two maize genotypes (salt-sensitive 'EV 1089' and salt-tolerant 'Syngenta 8441') were grown in pots containing 0 and 2 mM Si with and without 50 mM NaCl. After detailed investigation of ion concentrations in different maize organs, both genotypes were further selected in hydroponic experiment on basis of their contrasting response to salinity stress. In the second experiment, pre-germinated seedlings were transplanted into nutrient solution with 0 and 60 mM NaCl with and without 2 mM Si. Both genotypes differed significantly in their response to salinity. Silicon addition alleviated both osmotic and oxidative stress in maize crop by improving the performance of defensive machinery under salinity stress. Silicon application also improved the water-use efficiency in both tested genotypes under both normal and salinity stress conditions. In conclusion, this study implies that the silicon-treated maize plants had better chance to survive under salinity conditions and their photosynthetic and biochemical apparatus was working far better than that of silicon-non-treated plants.

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Genetic variability of salinity tolerance in spring wheat (Triticum aestivumL.)

Cited by 9 publications

References 16 publications

Estimates of Heterosis, Combining Ability and Correlation for Yield and its Components in Bread Wheat

Estimates of Heterosis, Combining Ability and Correlation for Yield and its Components in Bread Wheat

Field Screening of Wheat Advanced Lines for Salinity Tolerance

Silicon nutrition mitigates salinity stress in maize by modulating ion accumulation, photosynthesis, and antioxidants

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