Module 9 - Resistance to Disease Continued

Question 1

what genes must the pathogen and host have to have a resistant host

Answer 1

host must have resistant gene
pathogen must have avirulent gene

Question 2

how to manage resistance using R genes

Answer 2

deployment of R genes in time and space using varietal recombination, mixtures, or multilines

Question 3

how to manage resistance using breeding

Answer 3

rotation of R genes
gene pyramiding
use of quantitative resistance in combination with qualitative resistance genes

Question 4

________ production of one crop on a field may result in selection for virulent races of pathogens

Answer 4

frequent

Question 5

what is a good additional tool for germplasm evaluation

Answer 5

markers (molecular markers

Question 6

resistance is only likely to be durable when good ______ and _______ practices are followed

Answer 6

agronomic, cultural