Number of genes controlling slow rusting resistance to leaf rust in five spring wheat cultivars

Autor:	M. K. Das, Sanjaya Rajaram, W. E. Kronstad, Christopher C. Mundt
Rok vydání:	2004
Předmět:	Diallel cross Agronomy Resistance (ecology) Inoculation fungi food and beverages Poaceae Cultivar Heritability Plant disease resistance Biology Agronomy and Crop Science Rust
Zdroj:	Annals of Applied Biology. 145:91-94
ISSN:	1744-7348 0003-4746
Popis:	Summary The number of genes controlling slow rusting resistance to leaf rust (Puccinia triticina) 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) was 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.
Databáze:	OpenAIRE
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