Nar-1 and Nar-2, Two Loci Required for Mla12-Specified Race-Specific Resistance to Powdery Mildew in Barley.
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Nar-1 and Nar-2, Two Loci Required for Mla12-Specified Race-Specific Resistance to Powdery Mildew in Barley.
Previously isolated susceptible host mutants were used in a genetic and functional study of the resistance response of barley specified by resistance gene Mla12 to the fungal pathogen Erysiphe graminis f sp hordei. Mutant M66 represents a defective allele of Mla12, whereas M22, M82, and M100 represent mutations in loci unlinked to Mla12. Intermutant crosses of the latter three show that suscept...
متن کاملIdentification of Genes Required for the Function of Non-Race-Specific mlo Resistance to Powdery Mildew in Barley.
Recessive alleles (mlo) of the Mlo locus in barley mediate a broad, non-race-specific resistance reaction to the powdery mildew fungus Erysiphe graminis f sp hordei. A mutational approach was used to identify genes that are required for the function of mlo. Six susceptible M2 individuals were isolated after inoculation with the fungal isolate K1 from chemically mutagenized seed carrying the mlo...
متن کاملAllele Mining in Barley Genetic Resources Reveals Genes of Race-Non-Specific Powdery Mildew Resistance
Race-non-specific, or quantitative, pathogen resistance is of high importance to plant breeders due to its expected durability. However, it is usually controlled by multiple quantitative trait loci (QTL) and therefore difficult to handle in practice. Knowing the genes that underlie race-non-specific resistance (NR) would allow its exploitation in a more targeted manner. Here, we performed an as...
متن کاملMultiple Avirulence Loci and Allele-Specific Effector Recognition Control the Pm3 Race-Specific Resistance of Wheat to Powdery Mildew.
In cereals, several mildew resistance genes occur as large allelic series; for example, in wheat (Triticum aestivum and Triticum turgidum), 17 functional Pm3 alleles confer agronomically important race-specific resistance to powdery mildew (Blumeria graminis). The molecular basis of race specificity has been characterized in wheat, but little is known about the corresponding avirulence genes in...
متن کاملBarley Rom1 reveals a potential link between race-specific and nonhost resistance responses to powdery mildew fungi.
The Rar1 gene, identified in the context of race-specific powdery mildew resistance mediated by the Hordeum vulgare (barley) resistance (R) gene Mla12, is required for the function of many R-mediated defense responses in mono- and dicotyledonous plant species. Mla resistance is associated with an oxidative burst and a subsequent cell death reaction of attacked cells. Rar1 mutants are impaired i...
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ژورنال
عنوان ژورنال: The Plant Cell
سال: 1994
ISSN: 1040-4651,1532-298X
DOI: 10.1105/tpc.6.7.983