The first racial crosses to be made in Douglas-fir were initiated in 1963 and the nursery results were published in Silvae Genetica in 1966. Research Note No. 55 written in 1972 described the development of the 1963 to 1966 crosses on test sites 1 to 19. Research Note No. 85 describes the further development of all the crosses made between 1963 and 1968 on test sites 1 to 28 which are distributed over Vancouver Island and the Lower Mainland. It is felt that the results obtained to date would fully justify an expansion of this program. There is now considerably more information on both the most suitable seed and pollen parents and on the selection of test sites. As regards the latter, one disquieting factor has been the high incidence of root rot on some test sites and further mortality is inevitable. The components of variance and heritability estimates for survival and growth of the crosses both in the nursery and on the test sites are included for the first time.
Copies of this report are available from the Information Division, Ministry of Forests, Legislative Buildings, Victoria, B.C. V8V 1X5.
[Abstract contains full text of memo.]
BC Forest Service - Research Division. 1978. Survival and growth traits of racial crosses with Douglas-fir. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. Research Memo (FLNRORD). RM29
Topic: FLNRORD Research Program
Keywords: FLNRORD, Research Memo, British Columbia
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