For example in plants, shifts in breeding systems from wholly outbreeding to inbreeding or from hermaphroditic to dioecious systems are common. The numbers and kinds of genes responsible and the selective forces involved are a focus of my work. The adaptation of plants to their environment requires resistance to a vast variety of pathogens. These genes for resistance as well as the corresponding genes for virulence in the pathogens are continuously evolving and this process involving the interaction of host and pathogen is also a target of my work. The effect of reduced population sizes and gene flow on the maintenance of genetic variability and the organization of that variability and the role of inbreeding depression in small populations is a final area of research.
Inferences form sex linked molecular markers in Silene .
Potato diversity in the Andean center of crop diversity. Chase, M., R. Kesseli and K. Bawa. Microsatellite Markers for population and conservation genetics of tropical trees. Dole, J. and R. Kesseli. Inheritance of pale flower, calyx spotting and glandular pubescence in Mimulus guttatus x M. platycalyx progenies.