Differential expression and structural polymorphism in rubber tree genes related to South American leaf blight resistance.
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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.
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Seleção Genética, Queima da Folha, Seringueira, Clone, Latex, Melhoramento Genético Vegetal, Leaf blight, Rubber, Clones, Plant breeding, Plant genetics