Abstract
Over the past three decades, significant progress has been made in the field of resistance (R) gene cloning. Advances in recombinant DNA technology, genome sequencing, bioinformatics, plant transformation and plant husbandry have facilitated the transition from cloning R genes in model species to crop plants and their wild relatives. To date, researchers have isolated more than 450 R genes that play important roles in plant immunity. The molecular and biochemical mechanisms by which intracellular immune receptors are activated and initiate defense responses are now well understood. These advances present exciting opportunities for engineering disease-resistant crop plants that are protected by genetics rather than pesticides.
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