Genetic analysis of yield and physical traits of spring wheat grain

Ahmed, Hafiz Ghulam Muhu-Din; Khan, Abdus Salam; Kashif, Muhammad; Khan, Sultan Habibullah

doi:10.4038/jnsfsr.v46i1.8262

Cited by 8 publications

(10 citation statements)

References 11 publications

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“…The impact of root architecture and its mechanism on yield and yield-related attributes, especially in drought conditions, was comprehensively discussed in all major crops [33,34]. Stimulated root growth of wheat genotypes in water-deficient conditions was also described by wheat scientists [2,35]. The shoot length of wheat plant is an imperative trait which is influenced by water shortage.…”

Section: Resultsmentioning

confidence: 99%

“…Wheat demand is increasing with the continuous increase in human population and it is expected to reach up to 40% in 2030. Hence, there is a dire need to increase wheat production to ensure sustainable food security [1,2]. There are many constraints which are responsible for low yield including poor-quality seed, non-recommended sowing methods, delayed sowing, poor soil management, unbalanced fertilizer application, improper weed eradication, diseases, shortage of water, and heat and drought stress due to climatic changes [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Selection of wheat varieties on the basis of seedling traits is easy, cheap, and less laborious. Similarly, seedling attributes expose moderate-to-high variability with an additive gene effect across environments [2,11].…”

Section: Introductionmentioning

confidence: 99%

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Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage

Ahmed

Sajjad

et al. 2019

Sustainability

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Diminishing water resources as a result of excessive use of water for irrigation and climate change posture a severe global threat to food security. Herein, an experiment was conducted to determine the selection criteria for drought-tolerant bread wheat genotypes at the seedling stage using morphological and photosynthetic pigmentation-related traits. A panel of 105 wheat landraces, historical Pakistani varieties, and advance breeding lines were evaluated under normal and drought stress using factorial completely randomized design. The root length, fresh weight, dry weight, cell membrane thermo-stability, and chlorophyll b were positively correlated among themselves under both normal and stress conditions. Hence, selection of any one of these traits enhances the performance of other traits. The shoot length was non-significant and negatively associated with all other studied characters except relative water content. The results suggested that selection for shoot length could not improve genetic gain for drought tolerance. Out of 10 principal components (PCs), the first three PCs were showed significant genetic variation under both conditions. The first three PCs showed 74.6% and 76% cumulative genetic variation under normal and drought conditions, respectively. Based on PCA, 10 drought-tolerant and five drought-susceptible genotypes were identified. Overall results suggested that selection for root length, fresh weight, dry weight, cell membrane thermo-stability, and chlorophyll b at the seedling stage would improve genetic gain for drought tolerance. The outperforming genotypes under drought stress conditions can be useful in future wheat breeding programs, and early selection for the traits recommended in this study will be effective for developing high-yielding and drought-tolerant wheat varieties.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage

Ahmed

Sajjad

et al. 2019

Sustainability

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“…World demands more food due to a fast increase in human population and is expected that it will reach to 40% by 2030. Therefore, crop production must be increased to meet increased food demands and attain the goals of sustainable food security [ 12 , 25 ]. The global population is estimated to reach 9.8 billion people by 2050 [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Water Deficit Stress Tolerance Potential of Newly Developed Wheat Genotypes for Better Yield Based on Agronomic Traits and Stress Tolerance Indices: Physio-Biochemical Responses, Lipid Peroxidation and Antioxidative Defense Mechanism

Shahid

Ali

Al‐Misned

et al. 2022

Plants

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Changing environmental conditions, fresh water shortages for irrigation and the rapid increase in world population have created the problems of food insecurity and malnutrition. Different strategies, including the development of water stress-tolerant, high-yielding genotypes through breeding are used to fulfil the world food demand. The present study was conducted for the selection of high-yielding, drought-tolerant wheat genotypes, considering different morpho-physio-biochemical, agronomic and yield attributes in relation to the stress tolerance indices (STI). The experiment was carried out in field in a split-plot arrangement. Water deficit stress was maintained based on the number of irrigations. All genotypes showed a differential decreasing trend in different agronomic traits. However, the increasing or decreasing trend in leaf photosynthetic pigments, non-enzymatic and enzymatic antioxidants under limited water supply also found to be genotype-specific. Genotypes MP1, MP3, MP5, MP8 and MP10 performed better regarding the yield performance under water deficit stress, which was associated with their better maintenance of water relations, photosynthetic pigments and antioxidative defense mechanisms. In conclusion, the physio-biochemical mechanisms should also be considered as the part of breeding programs for the selection of stress-tolerant genotypes, along with agronomic traits, in wheat.

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“…Production of wheat is hampered predominantly by biotic and abiotic stresses. Drought stress reduces about 60% of agricultural productivity (Ahmed et al, 2018). Consequently, it is inevitable for wheat breeders to develop new varieties having improved tolerance against stresses, high yield potential, and better quality (Pandey et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Multivariate analysis of mutant wheat (Triticum aestivum L.) lines under drought stress

Zahra¹,

Shaheen²,

Hussain³

et al. 2021

Turk J Agric For

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Drought is a major threat to wheat production worldwide and development of droughttolerant wheat genotypes may improve the production of this cereal crop in drought affected regions. In the present study, 24 mutant lines were developed by treating a wheat variety 'NN-Gandum-1(NN-1) with ethyl methane sulfonate (EMS). The M5, M6, and M7 generations were evaluated for quantitative traits under well irrigated and rain-fed conditions. Furthermore, best performing mutants of M6 and M7 generations were examined for biochemical parameters. A Substantial correlation was found among the quantitative traits (plant height, spike length, tillers per plant, number of spikelets per spike and thousand grain weight) which confirmed their high heritability and relative relation. Principal component analysis (PCA) showed that the first two PCs with eigen values >1 had more than 50% of the total variability among the mutant lines under normal and water limited conditions. Cluster analysis depicted that considerable variations existed among all mutant lines. Among these mutant lines, some mutants showed significant variation consistently larger than corresponding values of wild type in multi-generation replication. Using drought tolerance indices (Stress tolerance index and geometric mean productivity), high yielding mutant lines under drought stress were selected. Across all these three-mutant generations, Mutant lines NN1-M-363, NN1-M-506, NN1-M-700, NN1-M-701, and NN1-M-1621 showed significant improvement as compared to wildtype in response to stress conditions. The selected five drought tolerant mutants showed increased accumulation of proline contents, total soluble sugars, total free amino acids, while decreased total chlorophyll content, carotenoids, and total soluble proteins.Results suggested that the morphological traits and yield attributes along with biochemical parameters could be utilized for the evaluation of wheat cultivars under drought stress.

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Genetic analysis of yield and physical traits of spring wheat grain

Cited by 8 publications

References 11 publications

Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage

Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage

Water Deficit Stress Tolerance Potential of Newly Developed Wheat Genotypes for Better Yield Based on Agronomic Traits and Stress Tolerance Indices: Physio-Biochemical Responses, Lipid Peroxidation and Antioxidative Defense Mechanism

Multivariate analysis of mutant wheat (Triticum aestivum L.) lines under drought stress

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