ArticleTAG. Theoretical and applied genetics. Theoretische und angewandte Genetik2018
A new leaf rust resistance gene Lr79 mapped in chromosome 3BL from the durum wheat landrace Aus26582.
Article in TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.
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43 citing papers in PubMed, 97 citations in OpenAlex.
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- Phenotyping and Exploitation of Kompetitive Allele-Specific PCR Assays for Genes Underpinning Leaf Rust Resistance in New Spring Wheat Mutant Lines.Current issues in molecular biology · 2024Article
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- Mapping and characterization of a novel adult-plant leaf rust resistance gene LrYang16G216 via bulked segregant analysis and conventional linkage method.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2023Article
- Identification of leaf rust resistance loci in a geographically diverse panel of wheat using genome-wide association analysis.Frontiers in plant science · 2023Article
- Genetic approaches to exploit landraces for improvement ofFrontiers in plant science · 2023Review
- Mining Sources of Resistance to Durum Leaf Rust among Tetraploid Wheat Accessions from CIMMYT's Germplasm Bank.Plants (Basel, Switzerland) · 2022Article
- Quick mapping and characterization of a co-located kernel length and thousand-kernel weight-related QTL in wheat.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2022Review
- Identification of Novel Broad-Spectrum Leaf Rust Resistance Sources from Khapli Wheat Landraces.Plants (Basel, Switzerland) · 2022Article
- An Update on Resistance Genes and Their Use in the Development of Leaf Rust Resistant Cultivars in Wheat.Frontiers in genetics · 2022Review
- Marker assisted improvement for leaf rust and moisture deficit stress tolerance in wheat variety HD3086.Frontiers in plant science · 2022Article
- A genome-wide association and fine-mapping study of white rust resistance in hexaploid chrysanthemum cultivars with a wild diploid reference genome.Horticulture research · 2022Article
- High-Density Genetic Variation Map Reveals Key Candidate Loci and Genes Associated With Important Agronomic Traits in Peanut.Frontiers in genetics · 2022Article
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
Abstract
key messageA new leaf rust resistance gene Lr79 has been mapped in the long arm of chromosome 3B and a linked marker was identified for marker-assisted selection. Aus26582, a durum wheat landrace from the A. E. Watkins Collection, showed seedling resistance against durum-specific and common wheat-specific Puccinia triticina (Pt) pathotypes. Genetic analysis using a recombinant inbred line (RIL) population developed from a cross between Aus26582 and the susceptible parent Bansi with Australian Pt pathotype showed digenic inheritance and the underlying loci were temporarily named LrAW2 and LrAW3. LrAW2 was located in chromosome 6BS and this study focused on characterisation of LrAW3 using RILs lacking LrAW2. LrAW3 was incorporated into the DArTseq map of Aus26582/Bansi and was located in chromosome 3BL. Markers linked with LrAW3 were developed from the chromosome survey sequence contig 3B_10474240 in which closely-linked DArTseq markers 1128708 and 3948563 were located. Although bulk segregant analysis (BSA) with the 90 K Infinium array identified 51 SNPs associated with LrAW3, only one SNP-derived KASP marker mapped close to the locus. Deletion bin mapping of LrAW3-linked markers located LrAW3 between bins 3BL11-0.85-0.90 and 3BL7-0.63. Since no other all stage leaf rust resistance gene is located in chromosome 3BL, LrAW3 represented a new locus and was designated Lr79. Marker sun786 mapped 1.8 cM distal to Lr79 and Aus26582 was null for this locus. However, the marker can be reliably scored as it also amplifies a monomorphic fragment that serves as an internal control to differentiate the null status of Aus26582 from reaction failure. This marker was validated among a set of durum and common wheat cultivars and was shown to be useful for marker-assisted selection of Lr79 at both ploidy levels.
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