|BRISCO, E. - Michigan State University|
|Porch, Timothy - Tim|
|KELLY, J. - Michigan State University|
Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Research Notes
Publication Acceptance Date: 3/15/2010
Publication Date: 3/15/2010
Citation: Brisco, E.I., Porch Clay, T.G., Kelly, J.D. 2010. Phenotypic evaluation of a dry bean mapping population for resistance to potato leafhopper. Annual Report of the Bean Improvement Cooperative. 53:84-85.
Interpretive Summary: The two species of the leafhopper insect, Empoasca fabae and Empoasca kraemeri, cause significant reductions in common bean yields worldwide. Genetic resistance to the leafhopper has been identified in common bean and resistant varieties have been developed, however, further genetic analysis is necessary to characterize resistance to this insect pest. A genetic study examining resistance to the temperate potato leafhopper, Empoasca fabae, was conducted in Michigan using a population developed from a susceptible variety, Matterhorn, and a resistant line, EMP507. Preliminary field data reveal that lines within the population vary significantly in their response to potato leafhopper feeding and nymph counts. Both of these traits are associated with resistance to leafhopper in the plant.
Technical Abstract: A genetic study examining resistance to the temperate potato leafhopper Empoasca fabae was conducted in Michigan using a dry bean mapping population of Matterhorn, a susceptible Michigan commercial variety, by EMP507, a line developed by CIAT for resistance to the tropical leafhopper E. kraemeri. Preliminary field data reveal strong segregation for damage symptoms associated with potato leafhopper feeding and potato leafhopper nymph counts, both of which are indicators of insect resistance mechanisms.