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Home → Publications → National Nursery Proceedings → 1966 → Intra-Tree Variations of Cone And Seed Characteristics of Douglas-Fir

Intra-Tree Variations of Cone And Seed Characteristics of Douglas-Fir

A prolific cone producing, 72 foot tall, open grown Douglas-fir tree was selected on the University of British Columbia Campus to study the intra-tree variation in cone and seed characteristics. The crown was separated into two aspects, north and south, and each aspect was further divided into three sections - top, middle and lower crown positions. One hundred cones were collected from each level before seed dispersal commenced in 1963, 1964 and 1965. The length and width of cones, seed and seed wings were measured and the total number of filled seeds were counted, germination per cent was determined, and survival in the greenhouse was assessed on the eight week old seedlings. At the same time the number of cotyledons and secondary needles were counted, and the length of hypocotyl was measured.


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Details

Author(s): Oscar Sziklai

Event: Western Forest Genetics Association
1965 - Olympia, Washington