Genetic Architecture of Anther Extrusion in Spring and Winter Wheat

Muqaddasi, Quddoos H.; Brassac, Jonathan; Börner, Andreas; Pillen, Klaus; Röder, Marion S.

doi:10.3389/fpls.2017.00754

Cited by 55 publications

(53 citation statements)

References 38 publications

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“…Intrachromosomal and genome‐wide LD assessment was performed using adjacent (pairwise) SNP loci, revealing that LD decayed rapidly with increasing genetic map distances. In the PCA analysis, no clear pattern was observed and the first two PCs together explain only 12.64% of the variance (Muqaddasi et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Uncovering the Genetic Architecture of Fruiting Efficiency in Bread Wheat: A Viable Alternative to Increase Yield Potential

et al. 2019

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To meet the estimated future increase in wheat (Triticum aestivum L.) demand, exploring and dissecting the genetic basis of yield‐related traits play a crucial role in wheat yield improvement. In this study, we evaluated 12 grain yield‐related traits including fruiting efficiency (FE) in a wheat panel through genome‐wide association mapping (GWAS) approach. The panel displayed large phenotypic variation for all the measured traits, FE was positively associated with grain number per spike but not related to thousand kernel weight. Interestingly, FE was mostly explained by grain number per fertile spikelet (GFS), whereas the latter was determined by spikelet weight (SW). The GWAS identified 44 significant marker‐trait associations (MTAs) across almost the entire wheat genome linked to the 12 yield‐related traits, including four MTAs on chromosomes 2A, 2D, 4D, and 5A associated with FE. Several significant markers were identified in genomic regions previously reported, whereas others appeared to be potentially novel loci. Particularly, the co‐location of significant markers for yield‐related traits with major genes underlying plant development showed pleiotropic effects and the key role of these genes in modulating agronomic traits. The markers linked to FE, GFS, and SW are promising, especially considering that due to the destructive phenotypic determination, their improvement in early breeding generations can only be made by marker‐assisted selection. Taken together, these findings are encouraging and suggest the potential value of FE and associated traits as possible selection criteria to increase yield potential in wheat breeding programs.

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Section: Resultsmentioning

confidence: 99%

Uncovering the Genetic Architecture of Fruiting Efficiency in Bread Wheat: A Viable Alternative to Increase Yield Potential

et al. 2019

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“…All parental lines were confirmed to be near-homozygous using the 15K wheat SNP array (Muqaddasi et al , 2017) (Trait Genetics GmbH, Gatersleben, Germany) consisting of 12,905 SNPs selected from the wheat 90 K array (Wang et al , 2014).…”

Section: Methodsmentioning

confidence: 99%

Three previously characterized resistances to yellow rust are encoded by a single locusWtk1

Klymiuk

Fatiukha

Raats

et al. 2020

Preprint

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The wild emmer wheat (Triticum turgidum ssp. dicoccoides; WEW) yellow (stripe) rust resistance genes Yr15, YrG303 and YrH52 were discovered in natural populations from different geographic locations. They all localize to chromosome 1B but were thought to be non-allelic based on differences in resistance response. We recently cloned Yr15 as a Wheat Tandem Kinase 1 (WTK1) and showed here that these three resistance loci co-segregate in fine-mapping populations and share identical full-length genomic sequence of functional Wtk1. Independent EMS mutagenized susceptible yrG303 and yrH52 lines carried single nucleotide mutations in Wtk1 that disrupted function. A comparison of the mutations for yr15, yrG303 and yrH52 mutants showed that while key conserved residues were intact, other conserved regions in critical kinase subdomains were frequently affected. Thus, we concluded that Yr15-, YrG303- and YrH52-mediated resistances to yellow rust are encoded by a single locus Wtk1. Introgression of Wtk1 into multiple genetic backgrounds resulted in variable phenotypic responses, confirming that Wtk1-mediated resistance is part of a complex immune response network. WEW natural populations subjected to natural selection and adaptation have potential to serve as a good source for evolutionary studies of different traits and multifaceted gene networks.HighlightWe demonstrate that Yr15, YrG303 and YrH52 resistances are encoded by the Wtk1 locus, but express variable resistance responses to yellow rust in a genetic background dependent manner.

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“…Similar to FHB, AE is characterized as a quantitative trait controlled by many genes and is currently widely studied to promote the cross-pollination ability in hybrid wheat [7,8]. It is also suggested as one of the resistance mechanisms to FHB [4,5,9].…”

Section: Introductionmentioning

confidence: 99%

Anther Extrusion and Its Association with Fusarium Head Blight in CIMMYT Wheat Germplasm

Dreisigacker

et al. 2019

Agronomy

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Pronounced anther extrusion (AE) is associated with field resistance to Fusarium head blight (FHB), one of the most devastating diseases of wheat globally. In this study, two recombinant inbred line (RIL) populations were used to map quantitative trait loci (QTL) for AE and field FHB resistance and to investigate the association of both traits at the genetic level. Furthermore, two panels of International Maize and Wheat Improvement Center (CIMMYT) wheat breeding lines were evaluated to describe the phenotypic association between the two traits in detail. Highly significant negative correlation was identified between AE and FHB severity in the two populations and the two panels, with r-values ranging from 0.55 to 0.74. QTL analysis in the two RIL populations identified 12 QTL for AE and nine for FHB resistance, of which five QTL located on chromosomes 3BL, 4BS, 4DS, 5AL, and 5BL were associated with both AE and FHB, collectively explaining over 50% of phenotypic variation for FHB. The QTL on chromosomes 4BS, 4DS, 5AL, and 5BL were closely linked to Rht-B1, Rht-D1, Vrn-A1, and Vrn-B1 genes, respectively. In conclusion, AE is closely related to field FHB resistance and could be used as a morphological marker in wheat breeding for field FHB resistance.

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Genetic Architecture of Anther Extrusion in Spring and Winter Wheat

Cited by 55 publications

References 38 publications

Uncovering the Genetic Architecture of Fruiting Efficiency in Bread Wheat: A Viable Alternative to Increase Yield Potential

Uncovering the Genetic Architecture of Fruiting Efficiency in Bread Wheat: A Viable Alternative to Increase Yield Potential

Three previously characterized resistances to yellow rust are encoded by a single locusWtk1

Anther Extrusion and Its Association with Fusarium Head Blight in CIMMYT Wheat Germplasm

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