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GrainGenes Reference Report: APG-145-91

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Reference
APG-145-91
Title
Number of genes controlling slow rusting resistance to leaf rust in five spring wheat cultivars
Journal
Annals of Applied Biology
Year
2004
Volume
145
Pages
91-94
Author
Das MK
Rajaram S
Mundt CC
Kronstad WE
Abstract
The number of genes controlling slow rusting resistance to leaf rust (Puccinia triticina (P. recondita)) was estimated in five spring wheat (Triticum aestivum) cultivars using quantitative formulae. Parents and F6 families were evaluated in replicated field trials under epidemics initiated by artificial inoculation. The F6 families resulted from a diallel cross involving the fast-rusting cultivar Yecora 70 and five slow-rusting wheat cultivars: Sonoita 81, Tanager 'S', Galvez 87, Ures 81, and Moncho 'S'. The area under the disease progress curve (AUDPC) as used to measure leaf rust severity over time. Results indicate that cultivar Sonoita 81 has three or four genes, Tanager 'S' has two or three genes, Galvez 87 has three genes, and both Ures 81 and Moncho 'S' have two genes for slow rusting resistance to leaf rust. Based on this result and previously reported moderate to high narrow-sense heritability estimates for slow rusting resistance in these materials, early-generation selection for slow leaf rusting would be effective
Keyword
brown rust
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