Skip to Main Content
Genetic subpopulation structuring and its implications in a mature eastern white pine standAuthor(s): Samuel E. Nijensohn; Paul G. Schaberg; Gary J. Hawley; Donald H. DeHayes; Donald H. DeHayes
Source: Canadian Journal of Forest Research. 35: 1041-1052.
Publication Series: Miscellaneous Publication
PDF: Download Publication (1.35 MB)
DescriptionWe examined patterns of genetic structuring within a mature eastern white pine (Pinus strobus L.) forest, using geographic information system (GIS)-based data and maps that combined genetic (isozyme analysis of 46 loci) and other tree-specific information (e.g., size, growth, age, and location) for 220 trees in Jericho, Vermont. Interconnections between genotypic information with other tree characteristics revealed several patterns of genetic structuring. Average observed heterozygosity generally increased with tree age-class, and trees with a high number of rare alleles were disproportionally represented in suppressed crown classes. Spatial structuring was also evident: trees within 5 m of one another were highly related, and levels of relatedness generally decreased with increasing distance between trees. In general, a 35-m-radius circle around any tree circumscribed its zone of genetic similarity. Hierarchical cluster analysis indicated the stand consisted of five family groups that exhibited greater genetic similarity within than among clusters. Temporal structuring (a generation gap) was also evident: trees of similar age showed significant positive relatedness, as did trees 30-40 years apart. Patterns of genetic structuring likely resulted from the combined influences of natural selection, isolation by distance, and functional generation times. Genetic structuring may also have biological and management implications. Computer-based simulated harvests suggested that the stand could experience genetic alteration when tree removal criteria disrupted existing structural patterns.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- 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.
CitationNijensohn, Samuel E.; Schaberg, Paul G.; Hawley, Gary J.; DeHayes, Donald H. 2005. Genetic subpopulation structuring and its implications in a mature eastern white pine stand. Canadian Journal of Forest Research. 35: 1041-1052.
Keywordsgenetic diversity, GIS
- White Pine Site Index for the Southern Forest Survey
- Thinning in mature eastern white pine: 43-year case study
- Spatial and population genetic structure of microsatellites in white pine
XML: View XML