Mutants of Puccinia graminis f. sp. tritici were obtained which were able to overcome simultaneously several host stem rust resistance (Sr) genes effective against the wild-type culture. These results suggest that, in addition to those Psr loci which relate specifically to host Sr genes in a "gene for gene" manner, one or more general loci may be present in this pathogen. The product(s) of these general genes may be necessary for the expression of various host Sr genes. The evolution of a super race capable of overcoming many Sr genes for resistance seems likely, as such a pathogen would not have to give up the many proteins predicted by the gene-for-gene relationship. Moreover, it appears that specificity in the wheat rust system is more complicated than suggested by the gene-for-gene concept.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC183572 | PMC |
| http://dx.doi.org/10.1128/aem.57.8.2332-2336.1991 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Broad-spectrum resistance to fungal foliar diseases in wheat: recent efforts and achievements.
Front Plant Sci
December 2024
Genebank Department, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Seeland, Germany.
Wheat ( spp.) is one of the most important cereal crops in the world. Several diseases affect wheat production and can cause 20-80% yield loss annually.
View Article and Find Full Text PDFEffect of Biopesticide Novochizol on Development of Stem Rust f. sp. in Wheat, L.
Plants (Basel)
December 2024
N.N. Vorozhtsov Institute of Organic Chemistry SB RAS, Lavrentiev ave. 9, 630090 Novosibirsk, Russia.
The use of biological plant protection products is promising for agriculture. In particular, chitosan-based biopesticides have become widespread for stimulating growth and protecting plants from a wide range of pathogens. Novochizol is a product obtained by intramolecular cross-linking of linear chitosan molecules and has a globular shape, which provides it with a number of advantages over chitosan.
View Article and Find Full Text PDFIdentification of reference genes for gene expression assessment in Avena sativa under biotic stress triggered by Blumeria graminis.
Sci Rep
December 2024
Institute of Plant Genetics, Breeding and Biotechnology, University of Life Sciences in Lublin, Akademicka 13, Lublin, 20-950, Poland.
Article Synopsis
- The study focuses on selecting reliable reference genes (RGs) for reverse transcription quantitative PCR (RT-qPCR) in Avena sativa (oats) infected by Blumeria graminis, a major fungal pathogen causing powdery mildew.
- Nine candidate RGs were tested across different oat lines and time points to determine their expression stability using four different algorithms.
- The best RG combination identified was HNR (heterogeneous nuclear ribonucleoprotein 27 C) and EIF4A (eukaryotic initiation factor 4 A‑3), while TUA (α-tubulin) was found to be the least stable option for normalizing gene expression data.
Biocontrol of , the Causal Agent of Coffee Leaf Rust, by sp. NMA1017.
Plant Dis
October 2024
Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Laboratorio de Biotecnología Microbiana, Prol. Carpio y Plan de Ayala s/n Col. Santo Tomás, Ciudad de México 11340, México.
Coffee leaf rust (CLR), caused by , is considered a highly important phytosanitary problem in Mexico. Currently, there are few microorganisms used as biocontrol alternatives to chemical control of CLR in organic coffee fields in Mexico. This study evaluates the use of sp.
View Article and Find Full Text PDFGenetic Diversity of Promising Spring Wheat Accessions from Russia and Kazakhstan for Rust Resistance.
Plants (Basel)
September 2024
Department of Agrotechnology, Omsk State Agrarian University, 644008 Omsk, Russia.
Article Synopsis
- Spring bread wheat is a key crop in Russia and Kazakhstan, heavily impacted by rust pathogens like leaf, stem, and yellow rust.
- A study tested 40 new wheat genotypes for their resistance to these rusts and identified several with significant resistance, including three that were resistant to all rust types.
- Molecular analysis revealed both cataloged and uncataloged resistance genes, indicating improved resistance and genetic diversity in the new wheat genotypes due to the introduction of alien genetic material.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!