The development of British Columbia's tree seed transfer guidelines: Purpose, concept, methodology, and implementation

2006 ◽  
Vol 227 (1-2) ◽  
pp. 1-13 ◽  
Author(s):  
Cheng C. Ying ◽  
Alvin D. Yanchuk
Keyword(s):  
Seed Transfer ◽  
Seed Transfer Guidelines ◽  
Tree Seed

A Simple Technique for Seed Transfer in X-ray Analysis of Seed

1974 ◽  
Vol 4 (3) ◽  
pp. 407-409
Author(s):  
B. S. P. Wang
Keyword(s):  
Simple Technique ◽  
Seedling Vigor ◽  
X Ray ◽  
Seed Germinability ◽  
Seed Transfer ◽  
Follow Up Study ◽  
Germinating Seeds ◽  
Tree Seed

Using X-radiography both for the follow-up study of germination and the correlation of tree seed germinability with embryo and endosperm (or megagametophyte) development often involve seed transfer by hand. Such a procedure is tedious and time-consuming and errors of seed displacement occur frequently. Conventional germination procedures also make counting germinants and evaluating seedling vigor difficult due to the shifting of positions of germinating seeds. A simple technique of using a combination of mechanized vacuum counting plate and perforated Plexiglas templates was devised to overcome these difficulties. It decreased by 40 times the time needed to transfer 400 seeds by hand. It also reduced errors of seed displacement.

Geographic variation, nursery effects, and early selection in lodgepole pine

1989 ◽  
Vol 19 (7) ◽  
pp. 832-841 ◽  
Author(s):  
C. C. Ying ◽  
C. Thompson ◽  
L. Herring
Keyword(s):  
British Columbia ◽  
Lodgepole Pine ◽  
Field Performance ◽  
Field Trials ◽  
Short Term ◽  
Interior Region ◽  
Seed Transfer ◽  
Seed Sources ◽  
Coastal British Columbia ◽  
Seed Transfer Guidelines

Thirty provenances of lodgepole pine (Pinuscontorta Dougl.) test stock raised at two nurseries, Cowichan Lake (coastal British Columbia) and Red Rock (interior British Columbia), were assessed in two 15-year field trials. Analyses indicated three broad geographic regions of genetic differentiation in British Columbia: coast, coast–interior transition, and central and southern interior. Provenance elevation was found to have a strong influence on growth. The results suggest that the present seed transfer guidelines for lodgepole pine in the interior region of this province are conservative enough to prevent the use of maladapted seed sources. Nursery effect declined over a period of 15 years, while provenance differences increased with the age of the trials. Interactions between provenances and sites also increased after age 9. This suggests that the effect due to seedling culture and environment in the nursery is short-term relative to the influence of the genetic component. Nursery growth was generally not a good predictor of provenance field performance.

Local was best: sourcing tree seed for future climates

2021 ◽  
Author(s):  
Gregory A. O'Neill ◽  
Erika Gómez-Pineda
Keyword(s):  
Climate Change ◽  
Pacific Northwest ◽  
Spatial Analyses ◽  
Plantation Establishment ◽  
Seed Transfer ◽  
Seed Supply ◽  
Seed Zones ◽  
The Pacific ◽  
Climate Envelope ◽  
Tree Seed

As climate change accelerates, foresters are looking to ever warmer climates to secure sources of climatically adapted tree seed with which to establish healthy and productive plantations. However, as seed procurement areas approach jurisdictional boundaries (states, provinces, nations), across which seed and seed transfer systems are not typically shared, innovative approaches are required to identify those plantation areas for which suitable domestic provenances will be lacking, and areas in neighbouring jurisdictions with matching warmer, future climates that could fill domestic seed supply gaps. We describe a straightforward, climate envelope approach to locate these areas, using British Columbia (BC), Canada, and the Pacific Northwest (PNW) USA to illustrate the analysis. We find that 21% of BC’s ecosystems (seed zones) will be at moderate or high risk of lacking adapted domestic provenances for plantation establishment by 2040. Importantly, however, we find large areas in the PNW that should be able to fill most of BC’s domestic seed supply gaps. Spatial analyses of this type will inform seed suppliers, managers and policymakers where alternative seed procurement arrangements are needed and underscore the operational and policy barriers to acquiring seed from warmer jurisdictions. More broadly they also highlight the need for inter-jurisdictional cooperation in matters pertaining to resource management.

scholarly journals The importance of quantitative trait differentiation in restoration: landscape heterogeneity and functional traits inform seed transfer guidelines

AoB Plants ◽  
2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Zebadiah G Yoko ◽  
Kate L Volk ◽  
Ned A Dochtermann ◽  
Jill A Hamilton
Keyword(s):  
Resource Allocation ◽  
Morphological Traits ◽  
Quantitative Traits ◽  
Scale Effects ◽  
Local Population ◽  
Genetic Differences ◽  
Regional Differentiation ◽  
Seed Transfer ◽  
Population Scale ◽  
Seed Transfer Guidelines

Abstract For widely distributed species, understanding the scale over which genetic variation correlates to landscape structure and composition is critical. Particularly within the context of restoration, the evolution of genetic differences may impact success if seeds are maladapted to the restoration environment. In this study, we used Geum triflorum to quantify the scale over which genetic differences for quantitative traits important to adaptation have evolved, comparing the proportion of variance attributed to broad regional- and local population-level effects. Geum triflorum is a widely distributed species spanning a range of environments, including alvar and prairie habitats, which have extreme regional differences in soil-moisture availability. Alvar habitats are regions of thin soil over limestone that experience substantial seasonal variation in water availability, from flooding to desiccation annually. This contrasts with prairie habitats, whose deeper soils mitigate irregular flood–desiccation cycles. Using a common garden experiment, we evaluated 15 traits broadly grouped into three trait classes: resource allocation, stomatal characteristics, and leaf morphological traits for individuals sourced from prairie and alvar environments. We quantified the proportion of trait variance explained by regional- and population-scale effects and compared the proportion of regional- and population-trait variances explained across trait classes. Significant regional differentiation was observed for the majority of quantitative traits; however, population-scale effects were equal or greater than regional effects, suggesting that important genetic differences may have evolved across the finer population scale. Stomatal and resource allocation trait classes exhibited substantial regional differentiation relative to morphological traits, which may indicate increased strength of selection for stomatal and resource allocation traits relative to morphological traits. These patterns point towards the value in considering the scale over which genetic differences may have evolved for widely distributed species and identify different functional trait classes that may be valuable in establishing seed transfer guidelines.

Assessment of population genetics and climatic variability can refine climate‐informed seed transfer guidelines

2020 ◽  
Vol 28 (3) ◽  
pp. 485-493 ◽  
Author(s):  
Rob Massatti ◽  
Robert K. Shriver ◽  
Daniel E. Winkler ◽  
Bryce A. Richardson ◽  
John B. Bradford
Keyword(s):  
Population Genetics ◽  
Climatic Variability ◽  
Seed Transfer ◽  
Seed Transfer Guidelines
Sign in / Sign up

Export Citation Format

Share Document