Skip to Main Content
Allozyme and microsatellite data reveal small clone size and high genetic diversity in aspen in the southern Cascade MountainsAuthor(s): Jennifer DeWoody; Thomas H. Rickman; Bobette E. Jones; Valerie D. Hipkins
Source: Forest Ecology and Management. 258(5): 687-696
Publication Series: Scientific Journal (JRNL)
Download Publication (345.61 KB)
DescriptionThe most widely distributed tree in North America, quaking aspen (Populus tremuloides, Michx.), reproduces sexually via seed and clonally via suckers. The size of aspen clones varies geographically, generally smaller in the east and large in the arid Intermountain West. In order to describe clone size and genetic structure of aspen in the southern Cascade Mountains, 864 stems from six sites were assayed at 15 isozyme and 6 microsatellite loci. Although isozymes reveal significantly lower levels of allelic richness (P < 0.001) and expected heterozygosity (P < 0.01), differences in genet diversity (isozyme G/N = 0.45, microsatellite G/N = 0.47) and allele frequency variation (isozyme FST = 0.02, microsatellite FST = 0.03) were nonsignificant. While amajority of stands were monoclonal, such stands were small, and the number of clones per stand was positively correlated with stand size (P < 0.0001). High genetic diversity, low genetic differentiation, and a rapid decay of spatial genetic structure consistent with long distance gene flow during seedling recruitment indicate that sexual reproduction is a significant factor contributing to the genetic structure of these populations. These findings further resolve the geographic variation in clonal structure observed in aspen across North America, providing novel information for land management and conservation efforts.
- You may send email to firstname.lastname@example.org 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.
CitationDeWoody, Jennifer; Rickman,Thomas H.; Jones, Bobette E.; Hipkins, Valerie D. 2009. Allozyme and microsatellite data reveal small clone size and high genetic diversity in aspen in the southern Cascade Mountains. Forest Ecology and Management. 258(5): 687-696.
KeywordsIsozymes, SSR, Genet, Populus, Somatic mutation
- Genetics and variation
- Molecular genetic variation in whitebark pine (Pinus albicaulis Engelm.) in the Inland West
- Great Basin aspen ecosystems
XML: View XML