The basis of genetic gain is genetic variation. The description, repackaging, and the use of this variation is tree improvement. Most of the Cooperative's focus will continue to be on measuring and describing genetic variation that will be economically useful for production forestry. The Cooperative will also continue to evaluate and understand genetic control of traits that will be useful for future breeding and deployment programs. Basic research such as evaluating environmental and genetic control of wood properties will provide key information as wood quality increases in value.