Research progress on downy mildew and disease re-sistance of quinoa
Quinoa is a kind of popular emerging crops because of its value for food and feed.Quinoa downy mil-dew(DM),caused by Peronospora variabilis,is the most serious global disease.The use of resistant varieties is the most economical,simple and effective measure to control quinoa DM.To better understand the latest research trends of quinoa resistance to DM at home and abroad,this paper describes the host range,host-specificity and"host jump-ing"phenomenon of quinoa DM.It also compares and analyzes the identification periods,methods,evaluation indexes and models of quinoa DM,confirming that the indoor identification technology of detached leaf inoculation is a reliable and effective method to identify DM resistance in quinoa.The resistance of quinoa cultivars varies greatly,there exist abundant resistant resources in quinoa wild relatives.The preliminary resistance mechanisms of quinoa DM have been expounded from the aspects of growth period,saponin content,stomatal traits,hormone metabolism and molecular mechanism of resistance.However,the interaction mechanisms of quinoa and P.variabilis are still unclear,further re-search is needed to conduct.
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