Genetic Basis of Coleopteran Vectorial Capacity for Bean pod mottle virus Transmission

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Why do some leaf–feeding arthropods transmit plant pathogens while others do not? Moreover, why typically are only a small minority of individuals within a vector species proficient at transmitting a particular pathogen? A considerable number of coleopteran beetles transmit viruses that cause disease to economically important vegetables and crops. However, the degree of variation within and among beetle species in their ability to harbor and transmit pathogens is remarkable (i.e. their vector competence). The genetic makeup of the vector undoubtedly contributes significantly to its susceptibility to pathogen infection and transmission, yet characterization of specific genes that influence vector competence has proven elusive. The long–term goal of the proposed research is to understand the genetic interactions and mechanisms of pathogen transmission by insects. Identifying genes that disrupt vector-mediated pathogen transmission will lead to novel and promising avenues for disease control. The proposed research will harness the unique attributes of a soybean pathosystem, consisting of three beetle species that exhibit individual and species level variation in their ability to vector a soybean virus that is prevalent in North America,