A GENECOLOGICAL STUDY OF THE GENUS PICEA IN BRITISH COLUMBIA

摘要: Summary The study is divided into two parts. Part A an investigation of geographic variation in immature spruce populations and refers to the growth behaviour 150 grown a relatively uniform environment. The seed, which was collected throughout white, Engelmann Sitka complex British Columbia, sown coastal nursery on Vancouver Island. Detailed measurements were made these during growing seasons. In laboratory seed samples same X-rayed determine embryo development, subsequently germinated at 25° C, B mature biometrical assessment cone scale morphology carried out mass collection cones 157 areas range Columbia. This collection, therefore, embraces all four species province. These are (Picea sitchensis (Bong,) Carr.), black (P. mariana (Mill,) B,S,P,), white glauca (Nlotnc) Voss subsp, glauca) (Moench) engelmannii). All subjected statistical analysis order relation between observed factors environment place origin. results both studies testify overwhelming influence environmental pressures associated with altitude respect white-Engelmann complex. regard white-Sitka indicate extent effect penetration spruce. Zones hybridization characterized. ecological significance photoperiodic adaptation spruce, relative importance flushing dormancy microevolution considered. bearing taxonomic status Columbia discussed, recommendations silviculture this