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

Desiderio, Francesca and Bourras, Salim and Mazzucotelli, Elisabetta and Rubiales, Diego and Keller, Beat and Cattivelli, Luigi and Vale, Giampiero (2021). Characterization of the Resistance to Powdery Mildew and Leaf Rust Carried by the Bread Wheat Cultivar Victo. International Journal of Molecular Sciences. 22 , 3109
[Research article]

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Abstract

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.

Authors/Creators:Desiderio, Francesca and Bourras, Salim and Mazzucotelli, Elisabetta and Rubiales, Diego and Keller, Beat and Cattivelli, Luigi and Vale, Giampiero
Title:Characterization of the Resistance to Powdery Mildew and Leaf Rust Carried by the Bread Wheat Cultivar Victo
Series Name/Journal:International Journal of Molecular Sciences
Year of publishing :2021
Volume:22
Article number:3109
Number of Pages:18
Publisher:MDPI
ISSN:1661-6596
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:Triticum aestivum, powdery mildew, leaf rust, molecular marker, QTL
URN:NBN:urn:nbn:se:slu:epsilon-p-111994
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111994
Additional ID:
Type of IDID
DOI10.3390/ijms22063109
Web of Science (WoS)000645740200001
ID Code:24197
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Deposited By: SLUpub Connector
Deposited On:31 May 2021 08:03
Metadata Last Modified:31 May 2021 08:11

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