Detailed project information for Study Plan Number 03001-09

Branch :	Southern Appalachian Field Branch
Study Plan Number :	03001-09
Study Title :	Survey of souther Appalachian forests for surviving butternut (Juglans cinerea) trees
Starting Date :
Completion Date :
Principal Investigator(s) :	Clark, Joe
Primary PI :	Clark, Joe
Telephone Number :	(865) 974-4790
Email Address :	jclark1@usgs.gov
SIS Number :	5002192
Primary Program Element :	Status and Trends
Second Program Element :	Endangered and At-Risk Species
Status :	Completed
Abstract :	Butternut (Juglans cinerea) is a valuable hardwood species native to eastern North America. Butternut is used for veneer, lumber, and is important as a wildlife mast species. Currently, many butternut populations are being devastated by the exotic fungus Sirococcus clavigifenti-juglan-dacearum. The disease causes multiple branch and stem cankers with a characteristic black color. Death is caused by main stem cankers that will eventually girdle the tree. The disease has eliminated many butternut populations in the southern region. Putative resistant trees have been reported from the Daniel Boone National Forest in Kentucky and the Pisgah National Forest in North Carolina. A backcross breeding process may be a feasible strategy for producing resistant butternut trees. The success of such a breeding process, however, depends on the ability to transfer resistance and the existence of germplasm with a sufficiently broad genetic base.
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