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pgr 2022, 9(1): 71-84 Back to browse issues page
Prioritization and Identification of Candidate Genes Associated with Root Traits Under Salinity Stress in Bread Wheat (Triticum aestivum L.)
Elina Nazari Khakshoor, Amin Azadi * , Peyman Fourozesh , Alireza Etminan, Eslam Majidi Hervan
Abstract:   (485 Views)
Salinity stress falls into the major environmental factors that limit the production of various crops, including wheat. An effective approach to reducing the impacts of stress is the production of new salinity-tolerant cultivars. Accordingly, identifying effective genes and molecular mechanisms responsible for salinity tolerance is an essential step for breeding programs. In this investigation, a population of F12 recombinant inbred lines (RIL) comprising 186 genotypes was studied to identify the loci that control some physiological traits and element concentrations in the wheat seedling stage under salinity stress. Totally, 12 quantitative traits loci (QTLs) were identified for wet weight, dry weight, length, and sodium and potassium contents using the composite interval mapping (CIM) analysis. Most of the identified QTLs were located on chromosomes B and D. A gene ontology (GO) analysis specified candidate genes in QTL regions. However, it is noteworthy that candidate genes need confirmation using marker-assisted identification. The prioritization of genes resulted in determining 3486 candidate genes in 19 GO phrases (including eight biological processes). These genes are involved in the processes of glutathione metabolism, L-phenylalanine catabolism, cytoplasmic translation, auxin-activated signaling pathway, transcriptional regulation, DNA-patterning, protoporphyrinogen IX, cell wall organization and genesis, xyloglucan tRNA metabolism, protein glycosylation, pigment biosynthesis, etc. GO may be introduced for identifying novel CGs in which the associated QTL is responsible for complicated traits.
Keywords: Salinity stress, Bread wheat, Candidate genes, QTL mapping
Full-Text [PDF 695 kb]   (92 Downloads)    
Type of Study: Research | Subject: Plant improvement
Accepted: 2022/08/21
* Corresponding Author Address: Department of Plant Breeding, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Shahre Rey, Iran
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Nazari Khakshoor E, Azadi A, Fourozesh P, Etminan A, Majidi Hervan E. Prioritization and Identification of Candidate Genes Associated with Root Traits Under Salinity Stress in Bread Wheat (Triticum aestivum L.). pgr 2022; 9 (1) :71-84
URL: http://pgr.lu.ac.ir/article-1-239-en.html

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