• Baltunis, Brian S.
  University of Maine Graduate School
  

Tree breeding programs across North America, Europe, and Asia have included Larix for nearly a hundred Years. In some cases, tree breeding programs have been established to develop intraspecific crosses and intraspecific hybrids using Larix decidua Mill, L. leptolepis (Sieb and Zucc) Gord., and L. laricina (Du Roi) K. Koch. Fifth year growth measurements were compared for intraspecific crosses of Larix Decidua (ExE), L. laricina (TxT), L. leptolepis (JxJ), and intraspecific hybrids between L. decidua and l. leptolepis (ExJ), L decidua and L. larcinia (EXT), L. leptolepis (TxJ) at a progeny test in Johnson Mountain Township, Maine. In addition, patterns in lateral shoot elongation of ExE, Txt, ExJ, JxE, and TxE were explored in order to explain variations in total height.