First Report of Rust Caused by on Creeping Fig, , in South Africa.

has recently been reported as the causal organism of rust on edible fig, in South Africa (SA) (Boshoff et al. 2022). This contradicted reports by Doidge (1927, 1950) and Verwoerd (1929) who listed as the causal organism of the disease in SA.

Genome-Enabled Analysis of Population Dynamics and Virulence-Associated Loci in the Oat Crown Rust Fungus f. sp. .

f. sp. () is an important fungal pathogen causing crown rust that impacts oat production worldwide.

Wheat Stem Rust Surveillance Reveals Two New Races of f. sp. in South Africa During 2016 to 2020.

Stem rust, caused by f. sp. (), is an important disease of wheat in South Africa (SA) and is primarily controlled using resistant cultivars.

The life cycle of on and species in South Africa.

Rust fungi are important plant pathogens and have been extensively studied on crops and other host plants worldwide. This study describes the heterecious life cycle of a rust fungus on (finger grass) and the species (large yellow bitter apple), (bitter apple), and (eggplant) in South Africa. Following field observations, inoculation studies involving telial isolates collected from plants produced spermogonia and aecia on , and .

A recombined Sr26 and Sr61 disease resistance gene stack in wheat encodes unrelated NLR genes.

The re-emergence of stem rust on wheat in Europe and Africa is reinforcing the ongoing need for durable resistance gene deployment. Here, we isolate from wheat, Sr26 and Sr61, with both genes independently introduced as alien chromosome introgressions from tall wheat grass (Thinopyrum ponticum). Mutational genomics and targeted exome capture identify Sr26 and Sr61 as separate single genes that encode unrelated (34.

Chromosomal composition analysis and molecular marker development for the novel Ug99-resistant wheat-Thinopyrum ponticum translocation line WTT34.

A novel Ug99-resistant wheat-Thinopyrum ponticum translocation line was produced, its chromosomal composition was analyzed and specific markers were developed. Stem rust caused by Puccinia graminis f. sp.

Historical Development of the Population in South Africa.

In contrast to many other countries, the virulence and genetic diversity of the South African population before 1980 is unknown, because of the absence of regular and systematic race analysis data and viable rust cultures. Herbarium specimens housed at the National Collection of Fungi, Biosystematics Unit, Plant Health and Protection, Agricultural Research Council, Pretoria, South Africa (SA), provided the opportunity to investigate the genetic development of the population using isolates collected between 1906 and 2010. Five subpopulations that survived between 21 and 82 years in the field were found.

Phenotypic and Genotypic Variation of in South Africa.

Sunflower ( L.) is the third largest grain crop by area planted in South Africa (SA). The annual yield is negatively affected by sunflower rust caused by Schw.

Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation.

Parasexuality contributes to diversity and adaptive evolution of haploid (monokaryotic) fungi. However, non-sexual genetic exchange mechanisms are not defined in dikaryotic fungi (containing two distinct haploid nuclei). Newly emerged strains of the wheat stem rust pathogen, Puccinia graminis f.

Mapping a Resistance Gene to f. sp. in the Bread Wheat Cultivar 'Matlabas'.

f. sp. race TTKSF+ was collected from the South African wheat cultivar 'Matlabas' in 2010.

Additive Manufacturing of Devices Used for Collection and Application of Cereal Rust Urediniospores.

Optimized inoculation procedures are an important consideration in achieving repeatable plant infection when working with biotrophic rust fungi. Several plant pathology laboratories specializing in rust research employ a system where the collection and application of fungal spores are accomplished using an exchangeable gelatin capsule. Urediniospores are collected from erumpent pustules on plant surfaces into a capsule fitted to a cyclone collector controlled by a vacuum pump.

Multilocus Genotypes of the Wheat Leaf Rust Fungus in Worldwide Regions Indicate Past and Current Long-Distance Migration.

Many plant pathogenic fungi have a global distribution across diverse ecological zones and agricultural production systems. , the wheat leaf rust fungus, is a major pathogen in many wheat production areas of the world. The objective of this research was to determine the genetic relatedness of in different worldwide regions.

Point Inoculation Method for Measuring Adult Plant Response of Wheat to Stripe Rust Infection.

Depending on the pathogenicity of the stripe rust fungus f. sp. , the nature of resistance in the wheat host plant, and the environment, a broad range of disease phenotypes can be expressed.

Tackling the re-emergence of wheat stem rust in Western Europe.

In our recent article, we reported the first occurrence of wheat stem rust in the UK in nearly six decades. An increased incidence of wheat stem rust in Western Europe, caused by the fungus f. sp.

Yield Loss Associated with Different Levels of Stem Rust Resistance in Bread Wheat.

Puccinia graminis f. sp. tritici race Ug99 (syn.

Potential for re-emergence of wheat stem rust in the United Kingdom.

Wheat stem rust, a devastating disease of wheat and barley caused by the fungal pathogen f. sp. , was largely eradicated in Western Europe during the mid-to-late twentieth century.

Correction to: Mapping adult plant stem rust resistance in barley accessions Hietpas-5 and GAW-79.

Unfortunately, one co-author name was incorrectly published in the original publication. The complete correct name should read as follows.

Mapping adult plant stem rust resistance in barley accessions Hietpas-5 and GAW-79.

Key message Major stem rust resistance QTLs proposed to be Rpg2 from Hietpas-5 and Rpg3 from GAW-79 were identified in chromosomes 2H and 5H, respectively, and will enhance the diversity of stem rust resistance in barley improvement programs. Stem rust is a devastating disease of cereal crops worldwide. In barley (Hordeum vulgare ssp.

Microsatellite Analysis and Urediniospore Dispersal Simulations Support the Movement of Puccinia graminis f. sp. tritici from Southern Africa to Australia.

The Australian wheat stem rust (Puccinia graminis f. sp. tritici) population was shaped by the introduction of four exotic incursions into the country.

Dissection of the multigenic wheat stem rust resistance present in the Montenegrin spring wheat accession PI 362698.

Background: Research to identify and characterize stem rust resistance genes in common wheat, Triticum aestivum, has been stimulated by the emergence of Ug99-lineage races of the wheat stem rust pathogen, Puccinia graminis f. sp. tritici (Pgt), in Eastern Africa.

Genome Targeted Introgression of Resistance to African Stem Rust from into Bread Wheat.

Many accessions of the wheat wild relative Sharon goatgrass ( Eig., ) are resistant to African races of the stem rust pathogen (i.e.

Vulnerability of Barley to African Pathotypes of Puccinia graminis f. sp. tritici and Sources of Resistance.

The emergence of widely virulent pathotypes (e.g., TTKSK in the Ug99 race group) of the stem rust pathogen (Puccinia graminis f.