There are evidences that suggest resistance of barley to non-adapted rust fungi (nonhost resistance) and partial resistance to adapted rust fungi share important features and are partly based on the same genes.
Nonhost resistance is, by definition, a resistance observed in all members of a nonhost plant species to all members of a potential pathogen species. Partial resistance is observed as low levels of infection despite the attacking ability of adapted rust fungi. To understand nonhost and partial resistance, the genes for the resistance need to be identified, isolated and validated for their function in resistance. This thesis reports on the work in progress towards identifying and isolating one gene for nonhost resistance and five genes for partial resistance. A new experimental line, Golden SusPtrit was developed by crossing barley variety Golden Promise with an experimental line SusPtrit. Golden SusPtrit is a valuable line to study the association between nonhost and partial resistance.