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Factors Affecting Cone and Seed Production in Douglas-Fir

Author(s) or contact(s): A.M. Colangeli, J.N. Owens, and S.J. Morris
Source: Research Branch
Subject: 
Series: FRDA Report
Other details:  Published 1989. Hardcopy is available.
 

Abstract

The causes of reduced seed yield in four Douglas fir (Pseudotsuga menziesii Mirb. Franco) trees at the Dewdney Seed Orchard in 1986 were found to be inadequate pollination (30%), low pollen vigour or viability (14%), embryo abortion (14%) and early ovule abortion (5%). The average seed efficiency (+ s.e.) for the four trees was 40 (+ 7). Conelet abortion in the four trees, averaged 43%, ranging from 20 to 64% per tree. Recommendations for increasing seed yield are discussed.

FRDA Research Report 057 (564 KB)

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Updated July 24, 2015