Title: Genetic variation in adaptive traits and seed transfer zones for Pseudoroegneria spicata (bluebunch wheatgrass) in the northwestern United States
Author: St. Clair, John Bradley; Kilkenny, Francis F.; Johnson, Richard C.; Shaw, Nancy L.; Weaver, George
Source: Ecological Application. 6(6): 933-948
Publication Series: Scientific Journal (JRNL)
Description: A genecological approach was used to explore genetic variation in adaptive traits in Pseudoroegneria spicata, a key restoration grass, in the intermountain western United States. Common garden experiments were established at three contrasting sites with seedlings from two maternal parents from each of 114 populations along with five commercial releases commonly used in restoration. Traits associated with size, flowering phenology, and leaf width varied considerably among populations and were moderately correlated with the climates of the seed sources. Pseudoroegneria spicata populations from warm, arid source environments were smaller with earlier phenology and had relatively narrow leaves than those from mild climates with cool summers, warm winters, low seasonal temperature differentials, high precipitation, and low aridity. Later phenology was generally associated with populations from colder climates. Releases were larger and more fecund than most of the native ecotypes, but were similar to native populations near their source of origin. Differences among native populations associated with source climates that are logical for survival, growth, and reproduction indicate that genetic variation across the landscape is adaptive and should be considered during restoration. Results were used to delineate seed transfer zones and population movement guidelines to ensure adapted plant materials for restoration activities.
Keywords: climate change, genecology, plant adaptation, Pseudoroegneria spicata, seed transfer, seed zones
- 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.
XML: View XML
St. Clair, John Bradley; Kilkenny, Francis F.; Johnson, Richard C.; Shaw, Nancy L.; Weaver, George. 2013. Genetic variation in adaptive traits and seed transfer zones for Pseudoroegneria spicata (bluebunch wheatgrass) in the northwestern United States. Ecological Applications. 6(6): 933-948.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility