Abstract
Growth potential, phenology, and cold hardiness were compared in progenies of 5 trees from each of 18 populations of Douglas—fir (Pseudotsuga menziesii va. glauca). Five—year—old seedlings growing in 2 nursery environments allowed assessment of population differentiation according to 6 variables related to growth and phenology. Freezing tests provided 5 variables that expressed cold hardiness in mid—September and near maximal hardiness. Statistical analyses of 11 variables suggested a differentiation of populations into 3 provinces. One province included cool environments, regardless of geographic origin. The remaining 2 provinces included relatively warm environments from either western Montana or eastern Washington and northern Idaho. Variation among provinces, among populations within provinces, and among trees within populations contributed to the genetic variance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
