Abstract
IT is usual for 5–10 years to elapse before catkins are borne on seedling trees of birch (Betula spp.). The existence of this non-flowering or juvenile period (up to 40 years in some genera) is an important factor in tree-breeding, since the improvement of tree form and timber quality is hampered by the long and indefinite interval between successive generations.
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Wareing, P. F., J. Linn. Soc. (in the press).
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LONGMAN, K., WAREING, P. Early Induction of Flowering in Birch Seedlings. Nature 184, 2037–2038 (1959). https://doi.org/10.1038/1842037b0
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DOI: https://doi.org/10.1038/1842037b0
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