Identification of a leaf rust resistance gene in the Chinese wheat line LB0288

Qi, Aiyong; Li, Xing; Shi, Ling-zhi; Liu, Daqun; Li, Zaifeng

doi:10.17221/2/2015-cjgpb

Cited by 6 publications

(7 citation statements)

References 29 publications

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“…Currently, eight Lr genes ( Lr 57, Lr 76, Lr 70, Lr 78, Lr Ac, Lr 1, Lr Syn137, and Lr LB88) have been mapped on chromosome 5D. Of these, Lr 1 [ 17 ], Lr Syn137 [ 57 ], and Lr LB88 [ 58 ] were located on the long arm of chromosome 5D.…”

Section: Resultsmentioning

confidence: 99%

Characterization of the Resistance to Powdery Mildew and Leaf Rust Carried by the Bread Wheat Cultivar Victo

Desiderio¹,

Bourras

Mazzucotelli³

et al. 2021

IJMS

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Leaf rust and powdery mildew are two important foliar diseases in wheat. A recombinant inbred line (RIL) population, obtained by crossing two bread wheat cultivars (‘Victo’ and ‘Spada’), was evaluated for resistance to the two pathogens at seedling stage. Upon developing a genetic map of 8726 SNP loci, linkage analysis identified three resistance Quantitative Trait Loci (QTLs), with ‘Victo’ contributing the resistant alleles to all loci. One major QTL (QPm.gb-7A) was detected in response to Blumeria graminis on chromosome 7A, which explained 90% of phenotypic variation (PV). The co-positional relationship with known powdery mildew (Pm) resistance loci suggested that a new source of resistance was identified in T. aestivum. Two QTLs were detected in response to Puccinia triticina: a major gene on chromosome 5D (QLr.gb-5D), explaining a total PV of about 59%, and a minor QTL on chromosome 2B (QLr.gb-2B). A positional relationship was observed between the QLr.gb-5D with the known Lr1 gene, but polymorphisms were found between the cloned Lr1 and the corresponding ‘Victo’ allele, suggesting that QLr.gb-5D could represent a new functional Lr1 allele. Lastly, upon anchoring the QTL on the T. aestivum reference genome, candidate genes were hypothesized on the basis of gene annotation and in silico gene expression analysis.

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Section: Resultsmentioning

confidence: 99%

Characterization of the Resistance to Powdery Mildew and Leaf Rust Carried by the Bread Wheat Cultivar Victo

Desiderio¹,

Bourras

Mazzucotelli³

et al. 2021

IJMS

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show abstract

“…geniculata (Kuraparthy et al 2007), and Lr70 from common wheat (Hiebert et al 2014), of which the latter two were assigned to the short arm of chromosome 5D. Qi et al (2015) described leaf rust resistance gene LrLB88 on chromosome 5DL that co-segregated with Lr1 but showed a reaction pattern to 13 Chinese Pt pathotypes that was clearly distinct to Lr1. Whether LrSyn137 and LrLB88 are independent genes or LrLB88 is an allele or closely linked to Lr1 needs to be determined in follow-up research.…”

Section: Discussionmentioning

confidence: 99%

Genetic analysis of Aegilops tauschii-derived seedling resistance to leaf rust in synthetic hexaploid wheat

et al. 2020

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Seedling resistance to leaf rust available in the synthetic hexaploid wheat line Syn137 was characterised by means of cytogenetic and linkage mapping. Monosomic analysis located a single dominant gene for leaf rust resistance on chromosome 5D. Molecular mapping not only confirmed this location but also positioned the gene to the distal part of the long arm of chromosome 5D. A test of allelism showed that the gene, tentatively named LrSyn137, is independent but closely linked to Lr1. It appears that Syn137 is occasionally heterogeneous for Lr1 since the analysis of the Lr1-specific marker RGA567-5 in the genetic mapping population indicated the presence of Lr1. Syn137 represents another source of genetic variation that can be useful for the diversification of leaf rust resistance in wheat cultivars.

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“…geniculata (Kuraparthy et al 2007), and Lr70 (Hiebert et al 2014) from common wheat; of which the latter two were assigned to the short arm of chromosome 5D. Qi et al (2015) described leaf rust resistance gene LrLB88 on chromosome 5DL that cosegregated with Lr1 but showed a reaction pattern to 13 Chinese Pt pathotypes that was clearly distinct to Lr1. Whether LrSyn137 and LrLB88 are independent genes or LrLB88 is an allele or closely linked to Lr1 needs to be determined in follow-up research.…”

Section: Discussionmentioning

confidence: 99%

Genetic analysis ofAegilops tauschii-derived seedling resistance to leaf rust in synthetic hexaploid wheat

Mohler

Schmolke

Zeller

et al. 2019

Preprint

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Seedling resistance to leaf rust available in the synthetic hexaploid wheat line Syn137 was characterized by means of cytogenetic and linkage mapping. Monosomic analysis located a single dominant gene for leaf rust resistance on chromosome 5D. Molecular mapping not only confirmed this location but also positioned the gene to the distal part of the long arm of chromosome 5D. A test of allelism showed that the gene, tentatively named LrSyn137, is independent but closely linked to Lr1. It appears that Syn137 is occasionally heterogeneous for Lr1 since the analysis of the Lr1-specific marker RGA567-5 in the mapping population indicated the presence of Lr1. Syn137 represents another source of genetic variation that can be useful for the diversification of leaf rust resistance in wheat cultivars.

show abstract

Identification of a leaf rust resistance gene in the Chinese wheat line LB0288

Cited by 6 publications

References 29 publications

Characterization of the Resistance to Powdery Mildew and Leaf Rust Carried by the Bread Wheat Cultivar Victo

Characterization of the Resistance to Powdery Mildew and Leaf Rust Carried by the Bread Wheat Cultivar Victo

Genetic analysis of Aegilops tauschii-derived seedling resistance to leaf rust in synthetic hexaploid wheat

Genetic analysis ofAegilops tauschii-derived seedling resistance to leaf rust in synthetic hexaploid wheat

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