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Heritabilities of Some First-Order Branching Traits in Pinus banksiana Lamb.

Notwithstanding the scarcity of ornamental jack pine trees, however, twelve handsome young phenotypes have emerged variously among ca. twenty thousand trees of the species included in a wide range of plantation experiments near Weldon Spring and Ashland, Missouri. Five of these twelve were found among adaptability, site preparation, and spacing studies; two came from early efforts to study seed-origin effects on performance of the species; and the remaining five arrived more recently through breeding experiments. Three of the five breeding-source trees were members of one 35-tree, full-sibling progeny group. These superior twelve trees have provided an interesting nucleus for jack pine improvement work; and, to broaden the genetic base, other selections have been (are being) added. These secondary selections are trees that possess in strong measure one or more desirable traits.


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Author(s): R. Brooks Polk

Publication: Tree Improvement and Genetics - Central States Forest Tree Improvement Conference - 1972