Genetic basis of oat resistance to fungal diseases

Sebesta, J.; Roderick, H. W.; Stojanović, Slobodan; Zwatz, B.; Harder, D. E.; Corazza, L.

doi:10.17221/9618-pps

Cited by 7 publications

(5 citation statements)

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“…Together, these results show that the RGAs tagging these genetic regions seem to belong to the same clusters of R genes that contain paralogous genes responsible for specific resistance to different P. coronata isolates and, at least for KO17, to two different pathogens -fungi and viruses. The clustering of oat R genes conferring resistance to different races of a pathogen has been well documented by genetic analysis (Marshall and Shaner 1992;Sebesta et al 2000). Close linkage between the genes conferring resistance to the two main fungal diseases of oats has also been observed (Chong et al 1994).…”

Section: Association Of Rgas With Disease Resistance Locimentioning

confidence: 92%

“…Breeding for resistance to these important diseases has been one of the top priorities in oat cultivar improvement programs. Several major resistance genes for either crown rust (Pc genes) or stem rust (Pg genes), which can provide complete host-plant resistance to a specific subset of races through a hypersensitive reaction, have been employed by oat breeders (reviewed by Sebesta et al 2000). In addition to complete resistance of the simply inherited hypersensitive type, partial resistance to crown rust (Chen et al 2000;Holland and Munkvald 2001; and various levels of tolerance to BYD (Barbosa-Neto et al 2000; have also been identified.…”

Section: Introductionmentioning

confidence: 99%

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Isolation and mapping of resistance gene analogs from the Avena strigosa genome

et al. 2004

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Degenerate primers based on conserved regions of the nucleotide binding site (NBS) domain (encoded by the largest group of cloned plant disease resistance genes) were used to isolate a set of 15 resistance gene analogs (RGA) from the diploid species Avena strigosa Schreb. These were grouped into seven classes on the basis of 60% or greater nucleic acid sequence identity. Representative clones were used for genetic mapping in diploid and hexaploid oats. Two RGAs were mapped at two loci of the linkage group AswBF belonging to the A. strigosa x A. wiestii Steud map, and ten RGAs were mapped at 15 loci in eight linkage groups belonging to the A. byzantina C. Koch cv. Kanota x A. sativa L. cv. Ogle map. A similar approach was used for targeting genes encoding receptor-like kinases. Three different sequences were obtained and mapped to two linkage groups of the hexaploid oat map. Associations were explored between already known disease resistance loci mapped in different populations and the RGAs. Molecular markers previously linked to crown rust and barley yellow dwarf resistance genes or quantitative trait loci were found in the Kanota x Ogle map linked to RGAs at a distance ranging from 0 cM to 20 cM. Homoeologous RGAs were found to be linked to loci either conferring resistance to different isolates of the same pathogen or to different pathogens. This suggests that these RGAs identify genome regions containing resistance gene clusters.

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Section: Association Of Rgas With Disease Resistance Locimentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Isolation and mapping of resistance gene analogs from the Avena strigosa genome

et al. 2004

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“…Oat race-specific resistance to fungi is influenced by a single either dominant nature, partially dominant, less recessive or incompletely recessive independently inherited gene as well as gene interaction like complimentary genes. 20 Recessive genes with additive effects predominantly influence racial non-specific resistance (slow disease spread) and tolerance. The effectiveness of disease resistance is predicted to rise with the presence of molecular markers linked to desirable qualities.…”

Section: Important Diseasesmentioning

confidence: 99%

An Overview of Breeding Objectives to Improve the Economically Important Traits in Oat

Hilli

Kapoor

2023

Curr Agri Res Jour

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The history of the modern oat may be traced to its intergeneric contamination of wheat and barley in southwest Asia, particularly in Mesopotamia and due to its use in only forage crop rather than a staple food in most of the countries it’s been neglected. There are just a few economically cultivated species of this self-pollinated crop, including A. sativa, A. nuda, and A. byzantina. After rice, wheat, maize, sorghum, and barley, oat production comes in at number six and in terms of oat production (FAO 2019). The present review was undertaken in order to address the present scenario of oats utilization and its consideration in research. The work majorly focussed in present are β glucan (due to its nutritional status) and disease resistance (majorly powdery mildew, pyrenophora leaf spot and crown rust) throughout the world but some drawbacks is that oats is usually neglected because of its limited use as forage value and also of its hexaploid nature. The different breeding methods employed till date for crop improvement are described in the chapter viz, traditional methods, diversity studies, mapping strategies, Marker aided breeding Association mapping, Genomic assisted breeding etc. Some of the qtls mapped by various researchers for different traits is also been listed in this article. Apart from these studies, the novel techniques which are still lacking in oats has much scope now to get it utilized through various improvement programmes like in other cereal crops.

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“…Desde que las primeras cuatro razas de P. graminis f. sp. avenae fueron descritas, la nomenclatura ha experimentado cambios menores y mayores, demostrando una interacción gen a gen entre el hospedante y el patógeno (Martens et al, 1970;Ebesta et al, 2000).…”

Section: Introductionunclassified

“…Since the first four races of P. graminis f. sp. avenae were described, nomenclature has suffered minor and major changes, demonstrating a gene to gene interaction between host and pathogen (Martens et al, 1970;Ebesta et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Selección De Genotipos De Avena Para La Identificación De Razas De Roya Del Tallo

Amaro

Espino

Mir

et al. 2018

Remexca

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La identif icación de razas f isiológicas de Puccinia graminis f. sp. avenae al usar diferenciales, es importante en los programas de mejoramiento genético de avena, para obtener genotipos resistentes a roya del tallo y conocer la evolución y dispersión regional del patógeno. En 2008-2009 en los invernaderos del CIMMYT, El Batán, México, se probaron 50 aislamientos monopustulares de P. graminis f. sp. avenae en 24 genotipos de avena (Avena sativa L.), con el objetivo de determinar la diversidad del patógeno en muestras recolectadas en seis estados de México y conocer si estos genotipos podían ser utilizados como plantas diferenciales. Los genotipos Avemex, Obsidiana, Papigochi, Diamante, Rarámuri, Chihuahua y el Progenitor 7, expresaron diferentes tipos de infección y se pueden usar como diferenciales para estudiar la diversidad del patógeno y la prevalencia de razas. Al usar estas diferenciales se encontraron 24 razas diferentes del patógeno. Esto permite concluir que existe gran variabilidad genética del hongo en las regiones muestreadas. Se observó que ante los aislamientos probados las variedades Agata, Avena desnuda, Menonita y Saia, mostraron el mayor nivel de resistencia; y los progenitores 11, 12 y 13, y las variedades 12, 14, 27, 28, 36, 43 y 44 tuvieron buen nivel de resistencia, por lo que pueden ser utilizados como progenitores en futuros planes de cruzamientos.

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Genetic basis of oat resistance to fungal diseases

Cited by 7 publications

References 0 publications

Isolation and mapping of resistance gene analogs from the Avena strigosa genome

Isolation and mapping of resistance gene analogs from the Avena strigosa genome

An Overview of Breeding Objectives to Improve the Economically Important Traits in Oat

Selección De Genotipos De Avena Para La Identificación De Razas De Roya Del Tallo

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