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GrainGenes Reference Report: TAG-133-2183

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Reference
TAG-133-2183
Title
Development and deployment of KASP markers for multiple alleles of Lr34 in wheat
Journal
Theoretical and Applied Genetics
Year
2020
Volume
133
Pages
2183-2195
Author
Fang T
[ Show all 6 ]
Abstract
Key message. Heterogeneous Lr34 genes for leaf rust in winter wheat cultivar 'Duster' and KASP markers for allelic variation in exon 11 and exon 22 of Lr34. Abstract. Wheat, Triticum aestivum (2n = 6x = 42, AABBDD), is a hexaploid species, and each of three homoeologous genomes A, B, and D should have one copy for a gene in its ancestral form if the gene has no duplication. Previously reported leaf rust resistance gene Lr34 has one copy on the short arm of chromosome 7D in hexaploid wheat, and allelic variation in Lr34 is in intron 4, exon 11, exon 12, or exon 22. In this study, we discovered that Oklahoma hard red winter wheat cultivar 'Duster' (PI 644,016) has two copies of the Lr34 gene, the resistance allele Lr34a and the susceptibility allele Lr34b. Both Lr34a and Lr34b were mapped in the same linkage group on chromosome 7D in a doubled-haploid population generated from a cross between Duster and a winter wheat cultivar 'Billings' which carries the susceptibility allele Lr34c. A chromosomal fragment including Lr34 and at least two neighboring genes on its proximal side but excluding genes on its distal side was duplicated in Duster. The Duster Lr34ab allele was associated with tip necrosis and increased resistance against leaf rust at adult plants in the Duster x Billings DH population tested in the field, demonstrating the function of the Duster Lr34ab allele in wheat. We have developed KASP markers for allelic variation in exon 11 and exon 22 of Lr34 in wheat. These markers can be utilized to accelerate the selection of Lr34 in wheat.
External Databases
https://doi.org/10.1007/s00122-020-03589-x
Probe
[ Hide all but 1 of 11 ]
Lr34 intron 4
Lr34 promoter
Lr34 exons 11-14
Lr34 Gene expression
Lr34-KASP-E11
Lr34-KASP-E22 5'
TraesCS7D01G080100
TraesCS7D01G080200
TraesCS7D01G080300
TraesCS7D01G080400
TraesCS7D01G080500

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