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    Author(s): William R. Jacobi; Holly S. J. Kearns; Angelia Kegley; Douglas P. Savin; Robert Danchok; Richard A. Sniezko
    Date: 2018
    Source: In: Schoettle, Anna W.; Sniezko, Richard A.; Kliejunas, John T., eds. Proceedings of the IUFRO joint conference: Genetics of five-needle pines, rusts of forest trees, and Strobusphere; 2014 June 15-20; Fort Collins, CO. Proc. RMRS-P-76. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 151-157.
    Publication Series: Proceedings (P)
    Station: Rocky Mountain Research Station
    PDF: Download Publication  (2.0 MB)

    Description

    Limber pine (Pinus flexilis) and Rocky Mountain bristlecone pine (Pinus aristata) are important components of forest ecosystems in the southern Rocky Mountains, United States. Both species are susceptible to white pine blister rust caused by the fungal pathogen Cronartium ribicola. However, very little is known about the relative resistance of the two species. In this study, we used artificial inoculation of seedlings to compare the relative susceptibilities of these two species. The objective of the inoculation test was to compare the performance of seedlings from bulk seedlots of limber pine and bristlecone pine exposed to three inoculum densities (low, medium, and high). This information will provide guidelines for inoculum density levels for future trials of these species and a first look at the extent of resistance present in the general population and its efficacy under exposure to increasing levels of inoculum.

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    Citation

    Jacobi, William R.; Kearns, Holly S. J.; Kegley, Angelia; Savin, Douglas P.; Danchok, Robert; Sniezko, Richard A. 2018. Comparative look at rust infection and resistance in limber pine (Pinus flexilis) and Rocky Mountain bristlecone pine (P. aristata) following artificial inoculation at three inoculum densities. In: Schoettle, Anna W.; Sniezko, Richard A.; Kliejunas, John T., eds. Proceedings of the IUFRO joint conference: Genetics of five-needle pines, rusts of forest trees, and Strobusphere; 2014 June 15-20; Fort Collins, CO. Proc. RMRS-P-76. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 151-157.

    Keywords

    genetic variation, genetic conservation, restoration, Pinus, Populus, rust fungi, disease resistance, climate change, Cronartium ribicola

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https://www.fs.usda.gov/treesearch/pubs/56726