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Home → Publications → National Nursery Proceedings → 1978 → Reduction of genetic base by sizing of bulk Douglas-fir seedlots

Reduction of genetic base by sizing of bulk Douglas-fir seedlots

Investigation of family differences in seed sizes and weights of 309 parent Douglas-fir (Pseudotsuga menziesii (Mirb.)Franco) trees shows that sizing of bulked seed lots to any significant degree eliminates virtually whole families thus accomplishing unintended reduction in genetic base. Year-to-year variation in family seed weight is appreciable. Relationship of seed size to weight is high, but low to 10-year family means.


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Author(s): Roy R. Silen, Cary Osterhaus

Publication: National Nursery Proceedings - 1978

Event: Nurseryman's conference and seed processing workshop
1978 - Eureka, CA