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    Author(s): Jim Hamlin; Richard A. Sniezko; Fikret Isik; Douglas P. Savin; Angelia Kegley; Sally Long; Robert Danchok
    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. 100.
    Publication Series: Proceedings (P)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (224.0 KB)

    Description

    Sugar pine (Pinus lambertiana) is a long-lived conifer species found in forest ecosystems from southern California to northern Oregon (USA). It is highly susceptible to white pine blister rust (WPBR), caused by the fungal pathogen Cronartium ribicola. Two long-term operational programs to develop populations of sugar pine with genetic resistance to WPBR, one in Oregon and one in California, have been ongoing for more than four decades. Most of the resistance work involves artificial inoculation of young seedlings. A small percentage of sugar pine parents have complete resistance (a hypersensitive-like response in the needles in the absence of a virulent strain of the rust) under the control of a single major dominant gene. In addition, there is a low frequency of partial resistance in some sugar pine parents. Partial resistance is thought to be under the control of multiple genes and more durable than the hypersensitive-like needle resistance. Both types of resistance could potentially be combined to increase survival at most field sites. However, detailed field trials to examine partial resistance in sugar pine are relatively rare.

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    Citation

    Hamlin, Jim; Sniezko, Richard A.; Isik, Fikret; Savin, Douglas P.; Kegley, Angelia; Long, Sally; Danchok, Robert. 2018. Genetic variation in height and white pine blister rust resistance in sugar pine (Pinus lambertiana) - 15-year field trial results of three six-parent half dialers from three breeding zones. 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. 100.

    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/56707