The potential of aspen clones and hybrids for enhanced forest management in Alberta

  • Author / Creator
    Gylander, Timothy
  • This thesis presents results from an industrial aspen tree improvement program for Alberta, evaluating a series of provenance, clonal and hybrid field trials. The goals were to (1) investigate geographic patterns of genetic variation in order to delineate breeding regions, (2) to assess the potential of clonal forestry systems to enhance forest productivity, and (3) to evaluate the potential of hybridization to enhance growth through hybrid vigor. Partitioning of genetic variance with geographic predictor variables suggests two breeding regions for Alberta should be appropriate: a Sub-Boreal Rocky Mountain Foothill region between 52°30'N and 56°N latitude, and a Boreal Mixedwood region between 56°N and 59°N latitude. Broad-sense heritabilities for height and diameter ranged from 0.36 to 0.64 on selected sites, allowing 5-15% genetic gains in height and 9-34% in diameter based on selections from current trials. The best genotypes within hybrid families could have some additional potential in improving yields.

  • Subjects / Keywords
  • Graduation date
    Fall 2011
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
  • Supervisor / co-supervisor and their department(s)
  • Examining committee members and their departments
    • Blenis, Peter (Renewable Resources)
    • Thomas, Barbara (Renewable Resources)
    • Yang, Rong-Cai (Agricultural, Food and Nutritional Sciences)
    • Brouard, Jean (Isabella Point Forestry)