Journal ArticleDOI
Identification of resistance genes to Puccinia striiformis in seedlings of Ethiopian and CIMMYT bread wheat varieties and lines
TLDR
In a controlled environment, the reaction was observed of 42 bread wheat varieties and lines inoculated with 19 isolates of yellow rust differing in their virulence to 20 differential varieties, which showed resistance to all isolates.Abstract:
In a controlled environment, the reaction was observed of 42 bread wheat varieties and lines inoculated with 19 isolates of yellow rust differing in their virulence to 20 differential varieties. Five varieties and lines showed resistance to all isolates. The remaining ones appeared to have the genes Yr2, Yr3, Yr4, Yr6, Yr7, Yr9 and YrA, either singly or in combination. Yr9 derived from rye was present in 67% of the varieties and lines. Yr4 is the only effective gene in that material as, in Eastern and Central Africa, yellow rust has virulence to the other Yr genes. Recognition of virulence to Yr genes is enhanced by the use of a supplemental set of differential varieties supposedly carrying a single gene. Additional keywords: yellow (stripe) rust races, Triticum aestivum, Yr genes.read more
Citations
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Journal ArticleDOI
Wheat Stripe Rust Epidemics and Races of Puccinia striiformis f. sp. tritici in the United States in 2000.
Xianming Chen,Mary Moore,Eugene A. Milus,David L. Long,R. F. Line,D. S. Marshall,L. F. Jackson +6 more
TL;DR: The epidemic in 2000 demonstrates that increased efforts to breed for stripe rust resistance are needed in California, the south-central states, and some other states in the Great Plains, to prevent large-scale and severe epidemics.
Journal ArticleDOI
Genetics of adult plant resistance to stripe rust in ten spring bread wheats
Ravi P. Singh,Sanjaya Rajaram +1 more
TL;DR: Nine Mexican spring bread wheat cultivars derived from CIMMYT germplasm and the U.S. spring wheat cultivar Wheaton were susceptible to the Mexican Puccinia striiformis pathotype 14E14 in seedling growth stage, but displayed different levels of adult plant resistances to the same pathotype when tested in the field.
Journal ArticleDOI
Identification of adult plant resistance to stripe rust in the wheat cultivar Cappelle-Desprez
TL;DR: Following the appearance of stripe rust in South Africa in 1996, efforts have been made to identify new sources of durable resistance to stripe rust by selecting for Cappelle-Desprez derived APR effective against South African pathotypes of the stripe rust fungus.
Journal ArticleDOI
Establishment, Distribution, and Pathogenicity of Puccinia striiformis f. sp. tritici in South Africa.
TL;DR: Monitoring of the occurrence, spread, and the possible development of new variants of the stripe rust pathogen and the susceptibility of grass species to the pathogen revealed that rainfed wheat produced in the Western Cape, Eastern Cape and the eastern Free State, as well as irrigated wheatproduced in KwaZulu-Natal and the Free state, are most likely to be affected by stripe rust epidemics.
Book ChapterDOI
Breeding for Durable Resistance to Diseases in Wheat: An International Perspective
M. Van Ginkel,Sanjaya Rajaram +1 more
TL;DR: In CIMMYT’s Bread Wheat Program, using historically proven, stable resistance sources in crosses, and alternating segregating populations between very diverse environments, thus exposing the material to various biotic stresses, indicates its possibly durable nature.
References
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Journal ArticleDOI
Yellow rust on wheat studies in epidemiology and physiologic specialization
Journal ArticleDOI
Gene-for-gene relationships in host: parasite systems
TL;DR: Analysis of published data of the Solanum:Phytopthora and Linum:Melampsora systems proved that gene-for-gene relationships are in fact operative in these systems and that Flor's hypothesis—that for each specific locus in the host determining resistance and susceptibility there is a specific and related loci in the parasite which determines virulence and avirulence—is correct.
Journal ArticleDOI
Nomenclature for physiologic races of Puccinia striiformis infecting wheat
TL;DR: A new system is proposed for nomenclature of physiologic races of Puccinia striiformis Westend, infecting wheat based upon the use of binary notation, to allow the addition of further differential varieties and the formation of extra sets of differential varieties for the study of local specialization within the pathogen population.
Journal ArticleDOI
Inheritance of resistance to yellow rust (Puccinia glumarum Erikss. & Henn.) in seven varieties of wheat
F.G.H. Lupton,R.C.F. Macer +1 more
TL;DR: A systematic nomenclature for the genes conferring yellow rust resistance is proposed and it is suggested that new, and genetically distinct, differential host varieties should be produced for the identification of physiologic races of P. glumarum.
Book ChapterDOI
3 – Stripe Rust
TL;DR: Stripe rust was first described by Gadd in 1777 as discussed by the authors, collected from rye under the name Puccinia striaeformis; the name was later revived as P. striiformis, which has its hosts only in the Gramineae family.