Host resistance - Supressors and susceptibilty genes
9 important questions on Host resistance - Supressors and susceptibilty genes
How are suppressors of resistance genes and genes required for resistance often identified?
- Mutagenesis can disrupt an R gene
- Results in a susceptible mutant
What is a mutated gene called when there is a mutation elsewhere on the genome, but the original R gene is not affected?
- Original R gene not affected by mutation
What can mutagenesis of a susceptible plant result in?
- Mutated gene may be a susceptibility factor
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What does the wild type allele encode in relation to pathogen infection?
- Factor required by the pathogen
What do susceptibility (S) genes do in plants?
- Enable plant diseases caused by certain pathogens
What did the study by Chun and Pung find out regarding the R gene in Psrl and its resistance?
- Investigated if Psrl gene from susceptible cultivar Carlsberg
What do natural mutant alleles of OsWRKY111 confer?
- Loss-of-function mutant alleles prevent disease
What results did the F2 test with AvrLm8 show in relation to Psrl and AvrLm1?
- Psrl gene not expressed in presence of AvrLm8 gene
How does the presence of suppressor genes affect resistance genes?
- Some suppress overall resistance, some are gene specific
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