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Genetic Variation in Seedling Progeny of Ponderosa Pine Provenances

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Twenty-four characteristics were measured on seedlings of 80 natural stand seed provenances of ponderosa pine, during three growing seasons in a replicated experiment at Bessey Nursery in central Nebraska. ISODATA analysis using 13 traits provided a basis for grouping the 80 origins into a pattern of nine geographic clusters. Two of the clusters, California and the North Plateau (Oregon, Washington, Idaho, and western Montana), fit the description of Pinus ponderosa var. ponderosa. Other clusters, east of the Continental Divide including one Arizona source west of it, were described as Pinus ponderosa var. scopulorum and delineated into: (1) Transition between the two varieties in west central Montana; (2) Central Montana; (3) Central Rockies from north central Wyoming to south central Colorado; (4) Black Hills and surrounding High Plains from eastern Montana to western Nebraska; (5) Easternmost, low elevation in northern Nebraska; (6) Colorado Plains east of the Front Range; and (7) Southern Rockies from extreme southern Colorado through central New Mexico and Arizona. These geographic delineations provide new knowledge of the genetic variation in the large eastern range of this species and serve as convenient subdivisions for seed collections and growth prediction purposes.

Keywords: Pinus ponderosa var. ponderosa; Pinus ponderosa var. scopulorum; geographic clusters; morphological traits; multicharacter analysis; simple correlations

Document Type: Journal Article

Publication date: December 1, 1980

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  • 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 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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