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Questions and Answers
According to R.H. Biffen's report, what was the genetic basis of resistance to stripe rust (Puccinia striiformis)?
According to R.H. Biffen's report, what was the genetic basis of resistance to stripe rust (Puccinia striiformis)?
- Controlled by epistatic gene interactions
- Controlled by a single Mendelian gene (correct)
- Controlled by additive gene effects
- Controlled by multiple Mendelian genes
What type of gene action is commonly observed for resistance to pests and pathogens?
What type of gene action is commonly observed for resistance to pests and pathogens?
- Recessive gene action
- Additive gene action
- Epistatic gene action
- Dominance gene action (correct)
How are resistance and avirulence genes usually reported to operate?
How are resistance and avirulence genes usually reported to operate?
- Through additive genetic effects
- On a gene-for-gene basis (correct)
- By linkage in clusters
- Through epistatic interactions
What is the common genetic basis for resistance to pests and pathogens, as mentioned in the text?
What is the common genetic basis for resistance to pests and pathogens, as mentioned in the text?
How are the effects of resistance genes described in the text?
How are the effects of resistance genes described in the text?
What is the mechanism that reduces the probability of contact between pathogens or pests and the plant?
What is the mechanism that reduces the probability of contact between pathogens or pests and the plant?
What is primarily applicable to attacks of animal pests and also to insect pests where entomologists describe it as antixenosis?
What is primarily applicable to attacks of animal pests and also to insect pests where entomologists describe it as antixenosis?
What characteristic makes a plant unattractive to insects for feeding, oviposition, or shelter?
What characteristic makes a plant unattractive to insects for feeding, oviposition, or shelter?
What may not be effective if there are no alternative hosts?
What may not be effective if there are no alternative hosts?
What does a repulsive odor in cotton do?
What does a repulsive odor in cotton do?
