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Nanism and Fusiform-Rust Resistance in Slash X Shortleaf Pine Hybrids

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In a 4-yr-old planting, 12.5 percent of slash X shortleaf pine hybrids were dwarfs but only 2.5 percent of the slash pine half-sibs were dwarfs. Nanism among the hybrids was affected by the geographic source of shortleaf pollen, but there was no apparent geographic pattern. Evidence is presented that nanism is a consequence of the hybridization of alien genomes. Hybrids between nonselected slash and shortleaf pines had outstanding fusiform-rust resistance, but they did not grow or survive as well as slash pine. Certain combinations of slash pine seed parent and shortleaf pollen source were, however, superior in survival, growth, and rust resistance to the best slash pine progenies. Forest Sci. 17:274-278.

Keywords: Cronartium fusiforme; P. elliottii; P. palustris; P. taeda; Pinus echinata; dwarfs; hybrids; provenance

Document Type: Journal Article

Affiliations: Principal Plant Geneticists, Southern Forest Exp. Sta., USDA Forest Service, Gulfport, Miss.

Publication date: 1971-09-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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