You are here: Home
/ Publication Information
Title: Landscape patterns of phenotypic variation and population structuring in a selfing grass, Elymus glaucus (blue wildrye).
Author: Erickson, Vicky J.; Mandel, Nancy L.; Sorensen, Frank C.;
Source: Canadian Journal of Botany. 82: 1776-1789
Publication Series: Miscellaneous Publication
Description: Source-related phenotypic variance was investigated in a common garden study of populations of Elymus glaucus Buckley (blue wildrye) from the Blue Mountain Ecological Province of northeastern Oregon and adjoining Washington. The primary objective of this study was to assess geographic patterns of potentially adaptive differentiation in this self-fertile allotetraploid grass, and use this information to develop a framework for guiding seed movement and preserving adaptive patterns of genetic variation in ongoing restoration work. Progeny of 188 families were grown for 3 years under two moisture treatments and measured for a wide range of traits involving growth, morphology, fecundity, and phenology. Variation among seed sources was analyzed in relation to physiographic and climatic trends, and to various spatial stratifications such as ecoregions, watersheds, edaphic classifications, etc. Principal component (PC) analysis extracted four primary PCs that together accounted for 67% of the variance in measured traits. Regression and cluster analyses revealed predominantly ecotypic or stepped-clinal distribution of genetic variation. Three distinct geographic groups of locations accounted for over 84% of the variation in PC-I and PC-2 scores; group differences were best described by longitude and ecoregion. Clinal variation in PC-3 and PC-4 scores was present in the largest geographic group. Four geographic subdivisions were proposed for delimiting E. glaucus seed transfer in the Blue Mountains.
Keywords: Elymus gtaucus, morphological variation, local adaptation, seed transfer, seed zones, polyploid
- 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.
- 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.)
XML: View XML
Erickson, Vicky J.; Mandel, Nancy L.; Sorensen, Frank C. 2004. Landscape patterns of phenotypic variation and population structuring in a selfing grass, Elymus glaucus (blue wildrye). Canadian Journal of Botany. 82: 1776-1789
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility