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Early Evaluation of Intra- and Inter-Provenance Hybrids of Loblolly Pine for Planting in Piedmont Regions of the Southern United States

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Two intra-provenance [Atlantic Coastal (C×C), Piedmont (P×P)] and two inter-provenance [Atlantic Coastal × Piedmont (C×P), Piedmont × Atlantic Coastal (P×C)] loblolly pine (Pinus taeda L.) populations, represented by 80 polycross families, were assessed for height, volume, and survival in five Piedmont regions at four years of age. The hybrid populations (C×P, P×C) were intermediate among the pure populations (C×C, P×P). Across and within regions the C×P hybrids were significantly taller and more productive in volume than the pure P×P, with performance comparable to that of C×C. The C×P hybrids exhibited stronger additive genetic control for both height and volume across and within regions, except for the two inland regions, where the P×C hybrids' genetic control for height was stronger. Stability of performance in height and volume varied among families within populations. These early results suggest that the C×P hybrids will perform better in milder Piedmont environments, while the P×C hybrids could be suitable for more inland and northern Piedmont sites. Long-term evaluation of population performance and adaptability is essential before implementing such a plan in the Piedmont.

Keywords: Growth; Pinus taeda L; heritability; heterosis; hybridization; stability of performance; survival

Document Type: Research Article

Publication date: 2006-10-01

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

    Also published by SAF:
    Journal of Forestry
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