Differential expression and structural polymorphism in rubber tree genes related to South American leaf blight resistance

摘要

South American leaf blight (SALB) is the worst impairment for rubber tree cultivation in the Amazon. Hevea brasiliensis clones produce high latex yields but most are SALB-susceptible (SS). So, resistance has been searched in related species. We selected defense related genes among those differentially expressed while contrasting SALB-resistant (SR) and susceptible clones from three Hevea species. SS clones over -expressed pathways responsive to salicylic (SA) and also jasmonic acid, thus entering a self -harmful cycle. SR clones displayed tightly coordinated SA -responsive and stress -control pathways. Polymorphism in the selected gene sequences supported SS ? SR clone divergence.