Skip to Main Content
Evaluating realized genetic gains from tree improvement.Author(s): J.B. St. Clair
Source: In: Proceedings: IUFRO S4.01 Conference. Blacksburg, VA. Publication FWS-1-93 of the College of Forestry, Virginia Polytechnic Institute: 145-157
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (1.04 MB)
DescriptionTree improvement has become an essential part of the management of forest lands for wood production, and predicting yields and realized gains from forests planted with genetically-improved trees will become increasingly important. This paper discusses concepts of tree improvement and genetic gain important to growth and yield modeling, and reviews previous studies of the growth and yield of genetically improved stands. Three types of studies that have been done include: (1) simulations in which assumptions have been made about key inputs into the models, (2) studies of genetic variation in stand productivity at the level of seed sources or families, and (3) actual comparisons of improved versus unimproved stands. Simulation studies indicated that genetic gains are highly likely, but how much gain is realized will depend on height-age trajectories after crown closure. Studies of genetic variation in stand productivity are ambiguous with respect to genetic variation in parameters of the height-age curve. Few studies have been published of actual comparisons of improved versus unimproved stands, although many such studies have recently been established. The design of a study to evaluate realized genetic gains from Douglas-fir tree improvement programs is presented.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationSt. Clair, J.B. 1993. Evaluating realized genetic gains from tree improvement. In: Proceedings: IUFRO S4.01 Conference. Blacksburg, VA. Publication FWS-1-93 of the College of Forestry, Virginia Polytechnic Institute: 145-157
- Incorporation of genetic gain into growth projections of Douglas-Fir using ORGANON and the Forest Vegetation Simulator
- Realized gains from block-plot coastal Douglas-fir trials in the northern Oregon Cascades
- Contribution of silviculture to loblolly pine growth and yield in the souutheastern United States: A meta-analysis
XML: View XML