Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 8/1/2007
Publication Date: 8/1/2007
Citation: Domier, L.L., Hobbs, H.A., Wang, Y., Hartman, G.L. Genetics of seed transmission Soybean mosaic virus [Abstract]. Phytopathology 97 (7): S29-S29 Suppl. S Jul 2007
Technical Abstract: Soybean mosaic virus (SMV) is an aphid- and seed-transmitted member of the Potyviridae that infects soybean plants and, in years when virus infections are widespread, can cause significant reductions in the quantity and quality of seed harvested. Because seed-borne infections are the primary sources of inoculum for SMV infections, resistance to seed transmission may provide a mechanism to limit the pool of plants that can serve as sources of inoculum. To examine the feasibility of moving resistance to seed transmission of SMV from soybean plant introductions (PIs) into elite soybean germplasm, the inheritance of SMV seed transmission was investigated. Based on preliminary studies, three PIs differing in their incidence of transmission of SMV through seed were selected as parents for the production of gene-mapping populations. Crosses were made between PI 88799 (high seed transmission of SMV), PI 60279 (moderate seed transmission of SMV) and PI 548391 (low seed transmission of SMV). In F2 plants from a cross between PI 88799 and PI 60279, SMV seed transmission segregation was consistent with a two recessive gene model. In F2 plants from crosses between PI 88799 and PI 548391, SMV seed transmission appeared to be polygenic. The segregation of molecular markers in the populations will be needed to define the chromosomal regions controlling the trait.