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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Publication Forest Nursery Proceedings
Event Eureka, CA - 1978
Author Roy Silen, Cary Osterhaus
Published 1978/10/01
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