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Article
Physiologic races of Puccinia triticina detected on wheat in South Africa from 2017 to 2020
Leaf rust, caused by Puccinia triticina (Pt), commonly occurs on wheat in South Africa (SA), particularly in the winter rainfall wheat growing regions of the Western Cape province. Virulence analysis of the South...
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Article
Assessments and perspectives on stem rust resistance in South African malting barley
The production of malting barley under dryland and irrigated environments in South Africa (SA) has increased recently, making it the second most important winter crop after wheat. To assess the potential vulne...
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Article
Comparing infection and colonisation of Puccinia graminis in barley and wheat
Barley, host to the wheat and rye attacking forms of the stem rust pathogen, Puccinia graminis (Pg), is considered inherently more resistant to Pg than wheat. To investigate whether this enhanced basal defence is...
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Article
Diversity in Puccinia graminis f. sp. avenae and its impact on oat cultivar response in South Africa
Puccinia graminis f. sp. avenae (Pga) samples were collected from cultivated oat (Avena sativa L.) in trial plots and commercial fields and from wild oat (Avena spp.) during the 2016 and 2017 seasons. Field sampl...
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Article
Response of an International Triticale Collection to Puccinia triticina and Puccinia recondita sensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates
Triticale is derived from a cross between wheat and rye and the leaf rust pathogen of wheat, Puccinia triticina (Pt), and that of rye, P. recondita sensu stricto (Pr), can potentially cause disease in this crop. ...
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Article
The value of field ratings of differential lines for pathoty** Puccinia graminis f. sp. tritici
Traditional race phenoty** of cereal rusts is based on the pathogenicity of field isolates on seedlings using a set of differential host lines. These lines are regularly planted in the field, often as part o...
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Article
Phenotypic and genotypic description of Puccinia graminis f. sp. tritici race 2SA55 in South Africa
Race 2SA55 of the wheat stem rust pathogen, Puccinia graminis f. sp. tritici, was described for the first time during 2000 in South Africa. This race is of particular interest as it was the first local report of ...
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Article
New Puccinia triticina races on wheat in South Africa
Virulence analysis of the South African Puccinia triticina Eriks. population from 2012 to 2016 revealed the presence of four new wheat (Triticum aestivum L.) leaf rust races, which coincided with the increased in...
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Article
Application of remote sensing to identify adult plant resistance loci to stripe rust in two bread wheat map** populations
Phenoty** of wheat stripe rust in genetic studies has traditionally relied on quantifying disease by means of the modified Cobb Scale. This approach requires scoring of disease severity and response type, ei...
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Article
Genetic map** of resistance to the Ug99 race group of Puccinia graminis f. sp. tritici in a spring wheat landrace CItr 4311
A gene for Ug99 resistance from wheat landrace CItr 4311 was detected on the long arm of chromosome 2B.
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Article
Assessing the vulnerability of wheat germplasm from Bangladesh and Nepal to Ug99 stem rust
Bread wheat (Triticum aestivum) is an important crop in South Asia and epidemics of stem rust, caused by Puccinia graminis f. sp. tritici, can impact negatively on food security. In a pro-active assessment of the...
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Article
Volatiles emitted by leaf rust infected wheat induce a defence response in exposed uninfected wheat seedlings
Volatile organic compounds emitted from plant tissues have been implicated to play many roles. Interplant signalling is an experimentally proven phenomenon whereby volatiles produced under stress conditions ma...
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Article
Races of Puccinia triticina detected on wheat in Zimbabwe, Zambia and Malawi and regional germplasm responses
To identify races of Puccinia triticina in southern Africa, samples of infected wheat leaves obtained from Zimbabwe, Zambia and Malawi were analysed at the University of the Free State, Bloemfontein and the Agric...
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Article
High-resolution map** and new marker development for adult plant stripe rust resistance QTL in the wheat cultivar Kariega
Three major quantitative trait loci (QTL) contribute to the durable adult plant stripe rust resistance in the high-quality bread wheat cultivar Kariega; QYr.sgi-2B.1 and QYr.sgi-4A.1, and the pleiotropic resistan...
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Article
Diversity in Puccinia triticina detected on wheat from 2008 to 2010 and the impact of new races on South African wheat germplasm
Samples of wheat and triticale infected with leaf rust were collected from 2008 to 2010 in South Africa to identify Puccinia triticina races. Races were identified based on their virulence profile on standard dif...
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Article
Seedling resistance to stem rust race Ug99 and marker analysis for Sr2, Sr24 and Sr31 in South African wheat cultivars and lines
The appearance and spread of races of Puccinia graminis f. sp. tritici with virulence for the Sr31 resistance gene has renewed interest in breeding for durable resistance to stem rust of wheat. Since the occurren...
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Article
Identification of adult plant resistance to stripe rust in the wheat cultivar Cappelle-Desprez
Following the appearance of stripe rust in South Africa in 1996, efforts have been made to identify new sources of durable resistance. The French cultivar Cappelle-Desprez has long been considered a source of ...
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Article
Borlaug Global Rust Initiative provides momentum for wheat rust research
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Article
QTL map** of stripe, leaf and stem rust resistance genes in a Kariega × Avocet S doubled haploid wheat population
Adult plant resistance to stripe (yellow) rust in the wheat cultivar Kariega has previously been ascribed to a major quantitative trait locus (QTL) on each of chromosomes 2B and 7D, along with a number of mino...
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Article
Reduction of Aegilops sharonensis chromatin associated with resistance genes Lr56 and Yr38 in wheat
The Lr56/Yr38 translocation consists primarily of alien-derived chromatin with only the 6AL telomeric region being of wheat origin. To improve its utility in wheat breeding, an attempt was made to exchange excess...
