Genetic variation in adaptive traits and seed transfer zones for
            
              P
              seudoroegneria spicata
            
            (bluebunch wheatgrass) in the northwestern
            U
            nited
            S
            tates

Seed transfer zones ensure that germplasm selected for restoration is suitable and sustainable in diverse environments. In this study, seed zones were developed for mountain brome ( Bromus carinatus Hook. & Arn.) in the Blue Mountains of northeastern Oregon and adjoining Washington. Plants from 148 Blue Mountain seed source locations were evaluated in common-garden studies at two contrasting test sites. Data on phenology, morphology, and production were collected over two growing seasons. Plant traits varied significantly and were frequently correlated with annual precipitation and annual maximum temperature at seed source locations (P < 0.05). Plants from warmer locations generally had higher dry matter production, longer leaves, wider crowns, denser foliage, and greater plant height than those from cooler locations. Regression models of environmental variables with the first two principal components (PC 1 and PC 2) explained 46% and 40% of the total variation, respectively. Maps of PC 1 and PC 2 generally corresponded to elevation, temperature, and precipitation gradients. The regression models developed from PC 1 and PC 2 and environmental variables were used to map seed transfer zones. These maps will be useful in selecting mountain brome seed sources for habitat restoration in the Blue Mountains.

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Genetic variation and seed transfer guidelines for lodgepole pine in central Oregon.

10.2737/pnw-rp-453 ◽

1992 ◽

Cited By ~ 6

Author(s):

Frank C. Sorensen

Keyword(s):

Genetic Variation ◽

Lodgepole Pine ◽

Seed Transfer ◽

Seed Transfer Guidelines

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Genetic variation and seed transfer guidelines for ponderosa pine in the Ochoco and Malheur National Forests of central Oregon.

10.2737/pnw-rp-468 ◽

1994 ◽

Cited By ~ 5

Author(s):

Frank C. Sorensen ◽

John C. Weber

Keyword(s):

Genetic Variation ◽

Ponderosa Pine ◽

National Forests ◽

Seed Transfer ◽

Seed Transfer Guidelines

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Fourwing saltbush (Atriplex canescens) seed transfer zones

10.2737/rmrs-gtr-125 ◽

2004 ◽

Cited By ~ 5

Author(s):

Stewart C. Sanderson ◽

Durant E. McArthur

Keyword(s):

Atriplex Canescens ◽

Seed Transfer ◽

Transfer Zones

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A model of genetic variation for Pinus ponderosa in the Inland Northwest (U.S.A.): applications in gene resource management

Canadian Journal of Forest Research ◽

10.1139/x91-209 ◽

1991 ◽

Vol 21 (10) ◽

pp. 1491-1500 ◽

Cited By ~ 45

Author(s):

G. E. Rehfeldt

Keyword(s):

Genetic Variation ◽

Pinus Ponderosa ◽

Regression Models ◽

Common Garden ◽

Shoot Elongation ◽

The United States ◽

Independent Data ◽

Gene Conservation ◽

Seed Transfer ◽

Inland Northwest

Models were developed to describe genetic variation among 201 seedling populations ofPinusponderosa var. ponderosa in the Inland Northwest of the United States. Common-garden studies provided three variables that reflected growth and development in field environments and three principal components of six variables that reflected patterns of shoot elongation. Regression models were developed for describing genetic variation across the landscape. Using functions of latitude, longitude, and elevation as descriptors, these models produced values of R2 that were as large as 0.66, while averaging 0.39. The models described genetic variation as occurring along relatively steep elevational clines and gentle geographic (i.e., latitudinal and longitudinal) clines. An exercise at validating the models with independent data supported their veracity. Predictions made by the models are applied to limiting seed transfer, designing breeding zones, planning gene conservation programs, interpreting phenotypic variation, and predicting the effects of environmental change on the adaptedness of populations.

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