Abstract
Experimental plantations of Pseudotsuga menziessi were established in Greece in 1962 with seeds introduced from W. Germany without precise records of their original geographic source. Today the species, after 24 years of testing, exhibits excellent growth and adaptability. It was therefore considered necessary to identify the unknown provenance. To accomplish this, biochemical analysis of monoterpenes from cortical oleoresin was carried out by gas-liquid chromatography. The identification was based on the comparison of the results obtained with the corresponding analyses made by other investigators throughout the natural range of Pseudotsuga menziessi in the U.S.A. and Canada. This comparison showed the geographic region of the unknown provenance to be located within latitude 42° -45° N and longitude 121° -122° W. The application of biochemical methods for the identification of unknown sources proved to be effective and should be considered as a useful technique in Forest Genetics and breeding programmes.
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