Accession Number : AD0774522

Title :   Chemosystematic Studies in the Genus 'Pseudotsuga'. III. Population Differences in British Columbia as Determined by Volatile Leaf Oil Analysis,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA SASKATOON (SASKATCHEWAN) PRAIRIE REGIONAL LAB

Personal Author(s) : VON Rudloff,E.

Report Date : 28 FEB 1973

Pagination or Media Count : 11

Abstract : Detailed analysis of the volatile leaf oil terpenes of different Douglas-fir populations and provenances growing in British Columbia confirmed the previous classification into the following terpene types: three coastal (A, B, and C), coastal intermediate, intermediate, interior intermediate, and Rocky Mountain. In areas of overlap of the coastal and Rocky Mountain varieties a continuous gradation of terpene types may be encountered. Differences in elevation or soil sites within homogeneous populations do not affect the terpene patterns noticeably. The major area of overlap occurs in the Cascade Mountains of southern British Columbia. Further inland either interior intermediate or Rocky Mountain types are found. However, at wet sites there is a noticeable increase of the coastal terpenes.

Descriptors :   *Trees, *Terpenes, *British Columbia, Canada, Oils, Classification, Coastal regions, Swamps, Mountains, Tissues(Biology), Gas chromatography, Quantitative analysis, Sites, Drying, Moisture

Subject Categories : Forestry
      Biology

Distribution Statement : APPROVED FOR PUBLIC RELEASE