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Improving disease resistance of butternut (Juglans cinerea), a threatened fine hardwood: a case of single-tree selection through genetic improvement and deploymentAuthor(s): C.H. Michler; P.M. Pijut; D.F. Jacobs; R. Meilan; K.E. Woeste; M.E. Ostry
Source: Tree Physiology. 26:121-128.
Publication Series: Scientific Journal (JRNL)
Station: North Central Research Station
PDF: Download Publication (157.98 KB)
DescriptionApproaches for the development of disease-resistant butternut (Juglans cinerea L.) are reviewed. Butternut is a threatened fine hardwood throughout its natural range in eastern North America because of the invasion of the exotic fungus, Sirococcus clavigignenti-juglandacearum Nair, Kostichka and Kuntz, which causes butternut canker. Early efforts were made to identify and collect putatively resistant germ plasm, identify vectors and to characterize the disease. More recently, molecular techniques have been employed to genetically characterize both the pathogen and the resistant germ plasm. Much of the host resistance may originate from hybridization with a close Asian relative, Japanese walnut (Juglans ailanthifolia Carr.), and from a few natural phenotypic variants. Further genetic characterization is needed before classical breeding or genetic modification can be used to produce canker-resistant trees.
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CitationMichler, C.H.; Pijut, P.M.; Jacobs, D.F.; Meilan, R.; Woeste, K.E.; Ostry, M.E. 2005. Improving disease resistance of butternut (Juglans cinerea), a threatened fine hardwood: a case of single-tree selection through genetic improvement and deployment. Tree Physiology. 26:121-128.
Keywordshybridization, polymorphism, regeneration, Sirococcus clavigignenti-juglandacearum, tree breeding, vegetative propagation.
- Morphological and molecular methods to identify butternut (Juglans cinerea) and butternut hybrids: relevance to butternut conservation
- DNA markers identify hybrids between butternut (Juglans cinerea L.) and Japanese walnut (Juglans ailantifolia Carr.)
- Screening butternut and butternut hybrids for resistance to butternut canker
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