Phenotypic Variation in Cone and Seed Characteristics of Tamarack in Northwestern Ontario
Variations in cone size and morphology, number of seed per cone, percentage filled seed, percentage insect-damaged seed, and seed dimensions were evaluated in individual tree samples collected in 1984 from nine regions of northwestern Ontario. Nested analyses of variance revealed no major provenance differences in cone or seed morphology, but there was substantial variance among stands within provenances and trees within stands. Percentage of filled seeds was lower in northern (51 to 56°) than in southern (46 to 49°) populations, and samples from Fort Severn on Hudson's Bay, the most northerly source, contained less than 1 % filled seed. Within population variance in characters related to seed productivity (for example, number of seed per cone) was large enough to suggest that selection for these characters may be effective. Tree Planters' Notes 42(3):18-22; 1991.
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Author(s): Gwennoth J. O'Reilly, Robert E. Farmer, Jr.
Publication: Tree Planters' Notes - Volumes 42, Number 3 (1991)
Section: Peer-Reviewed Articles
Volume: 42
Number: 3
