Derivation and Characterization of Recombinants of the Lr54/Yr37 Translocation in Common Wheat

Heyns, Ian; Pretorius, Z. A.; Marais, Francois

doi:10.2174/1874294701105010001

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…Lr54 originated from chromosome 2L of Ae. kotschyi (Marais et al, 2005; Heyns et al, 2011). Given that genetic stocks known to carry Lr54 were not included in this association panel, QLr.stars‐2D may be associated with the QTL identified in wheat cultivar Arina, rather than Lr54 .…”

Section: Discussionmentioning

confidence: 99%

Genome‐Wide Association Mapping Reveals Novel QTL for Seedling Leaf Rust Resistance in a Worldwide Collection of Winter Wheat

Xu²,

Bai³

et al. 2016

The Plant Genome

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Leaf rust of wheat (Triticum aestivum L.) is a major disease that causes significant yield losses worldwide. The short-lived nature of leaf rust resistance (Lr) genes necessitates a continuous search for novel sources of resistance. We performed a genome-wide association study (GWAS) on a panel of 1596 wheat accessions. The panel was evaluated for leaf rust reaction by testing with a bulk of Puccinia triticina Eriks. (Pt) isolates collected from multiple fields of Oklahoma in 2013 and two predominant races in the fields of Oklahoma in 2015. The panel was genotyped with a set of 5011 single-nucleotide polymorphism (SNP) markers. A total of 14 quantitative trait loci (QTL) for leaf rust resistance were identified at a false discovery rate (FDR) of 0.01 using the mixed linear model (MLM). Of these, eight QTL reside in the vicinity of known genes or QTL, and more studies are needed to determine their relationship with known loci. QLr.stars-7AL1 is a new QTL to bread wheat but is close to a locus previously identified in durum wheat [Triticum turgidum L. subsp. durum (Desf.) Husn.]. The other five QTL, including QLr. , are likely novel loci for leaf rust resistance. The uneven distribution of the 14 QTL in the six subpopulations of the panel suggests that wheat breeders can enhance leaf rust resistance by selectively introgressing some of these QTL into their breeding materials. In addition, another 31 QTL were significantly associated with leaf rust resistance at a FDR of 0.05. L eaf rust, caused by Puccinia, is a major foliar disease that has afflicted wheat for thousands of years (Bolton et al., 2008). Leaf rust occurs nearly everywhere wheat is grown and typically reduces yield by 5 to 15% or more depending on crop developmental stage when the initial rust infection occurs (Samborski, 1995 Abbreviations: FDR, false discovery rate; GWAS, genome-wide association study; HR, highly resistant; HS, highly susceptible; iCore, informative core; IT, infection type; LD, linkage disequilibrium; LnP(D), log probability of data; MLM, mixed linear model; MR, moderately resistant; MS, moderately susceptible; NSGC, National Small Grains Collection; PCR, polymerase chain reaction; Pt, Puccinia triticina Eriks.; QTL, quantitative trait loci; SNP, single-nucleotide polymorphism. Core Ideas• The association panel used in this study may represent the largest in wheat GWAS• Three pathotypes, including a bulked races collected in the field, were used• A total of 14 QTL for leaf rust resistance were identified at a FDR of 0.01.• Six QTL identified in this study are novel loci in bread wheat• Thirty-one additional QTL were significant at a FDR of 0.05.

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Section: Discussionmentioning

confidence: 99%

Genome‐Wide Association Mapping Reveals Novel QTL for Seedling Leaf Rust Resistance in a Worldwide Collection of Winter Wheat

Xu²,

Bai³

et al. 2016

The Plant Genome

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“…AS gene Lr54 was introgressed from Aegilop kotschyi to chromosome 2DL. A dominant sequence characterized amplified region (SCAR) marker and three microsatellite markers were developed to detect Lr54 [130].…”

Section: Lr/qlr On Chromosome 2dmentioning

confidence: 99%

Genetics of Resistance to Leaf Rust in Wheat: An Overview in A Genome-Wide Level

Ren¹,

Wang²,

Ren³

et al. 2022

Preprint

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Due to the global warming and dynamic changes in pathogenic virulence, leaf rust caused by Puccinia triticina has greatly expanded its epidermic region and become a severe threat to global wheat production. Genetic bases of wheat resistance to leaf rust mainly relies on the leaf rust resistance (Lr) gene or quantitative trait locus (QLr). Although these genetic loci have been insensitively studied during the last two decades, an updated overview of Lr/QLr in a genome-wide level is urgently needed. This review summarized recent progresses in genetic studies of wheat resistance to leaf rust. Wheat germplasms with great potentials in genetic improvement of resistance to leaf rust were highlighted. Key information about the genetic loci carrying Lr/QLr were summarized. A genome-wide chromosome distribution map for all the Lr/QLr was generated based on the released wheat reference genome. In conclusion, this review has provided valuable sources for both wheat breeders and researchers to understand the genetics of resistance to leaf rust in wheat.

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Utilization of Wild Species for Wheat Improvement Using Genomic Approaches

Kaur

Jindal

Kaur

et al. 2018

Biotechnologies of Crop Improvement, Volume 3

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Derivation and Characterization of Recombinants of the Lr54/Yr37 Translocation in Common Wheat

Cited by 3 publications

References 24 publications

Genome‐Wide Association Mapping Reveals Novel QTL for Seedling Leaf Rust Resistance in a Worldwide Collection of Winter Wheat

Genome‐Wide Association Mapping Reveals Novel QTL for Seedling Leaf Rust Resistance in a Worldwide Collection of Winter Wheat

Genetics of Resistance to Leaf Rust in Wheat: An Overview in A Genome-Wide Level

Utilization of Wild Species for Wheat Improvement Using Genomic Approaches

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