Genome-wide association study reveals novel genomic regions for grain yield and yield-related traits in drought-stressed synthetic hexaploid wheat

dc.creatorBhatta, M.R.
dc.creatorMorgounov, A.I.
dc.creatorBelamkar, V.
dc.creatorBaenziger, P.S.
dc.date2018-10-23T18:13:33Z
dc.date2018-10-23T18:13:33Z
dc.date2018
dc.date.accessioned2023-07-17T20:03:04Z
dc.date.available2023-07-17T20:03:04Z
dc.identifier1661-6596
dc.identifierhttps://hdl.handle.net/10883/19653
dc.identifier10.3390/ijms19103011
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7511537
dc.descriptionSynthetic hexaploid wheat (SHW; 2n = 6x = 42, AABBDD, Triticum aestivum L.) is produced from an interspecific cross between durum wheat (2n = 4x = 28, AABB, T. turgidum L.) and goat grass (2n = 2x = 14, DD, Aegilops tauschii Coss.) and is reported to have significant novel alleles-controlling biotic and abiotic stresses resistance. A genome-wide association study (GWAS) was conducted to unravel these loci [marker?trait associations (MTAs)] using 35,648 genotyping-by-sequencing-derived single nucleotide polymorphisms in 123 SHWs. We identified 90 novel MTAs (45, 11, and 34 on the A, B, and D genomes, respectively) and haplotype blocks associated with grain yield and yield-related traits including root traits under drought stress. The phenotypic variance explained by the MTAs ranged from 1.1% to 32.3%. Most of the MTAs (120 out of 194) identified were found in genes, and of these 45 MTAs were in genes annotated as having a potential role in drought stress. This result provides further evidence for the reliability of MTAs identified. The large number of MTAs (53) identified especially on the D-genome demonstrate the potential of SHWs for elucidating the genetic architecture of complex traits and provide an opportunity for further improvement of wheat under rapidly changing climatic conditions.
dc.formatPDF
dc.languageEnglish
dc.publisherMDPI
dc.relationhttps://www.mdpi.com/1422-0067/19/10/3011/s1
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dc.rightsOpen Access
dc.source10, art. 3011
dc.source19
dc.sourceJournal of Molecular Sciences
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectMarker Trait Association
dc.subjectHaplotype Blocks
dc.subjectRoot Traits
dc.subjectD-Genome
dc.subjectGenotyping by Sequencing
dc.subjectSingle Nucleotide Polymorphism
dc.subjectComplex Traits
dc.subjectDurum Wheat
dc.subjectBread Wheat
dc.subjectSOFT WHEAT
dc.subjectHARD WHEAT
dc.subjectNUCLEOTIDE SEQUENCE
dc.subjectGENOTYPES
dc.subjectGENES
dc.subjectGENETIC MARKERS
dc.titleGenome-wide association study reveals novel genomic regions for grain yield and yield-related traits in drought-stressed synthetic hexaploid wheat
dc.typeArticle
dc.coverageBasel, Switzerland


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