MULTIPLICATION RATES IN-VITRO AND BY STEM CUTTINGS PROPAGATION, AND CLONAL DEVELOPMENT FROM EUCALYPTUS-GLOBULUS SEEDLINGS

In developing new clones of forest trees, the first main goal is to pr opagate enough plantable plants for clonal field trials and a clonal a rchive. Models of clonal multiplication rates in Eucalyptus globulus i ndicate that this takes a similar time (about 56 wk) from the sowing o f seed, whether multiplication is by axillary shoot culture in vitro o r by stem cuttings propagation. Multiplication of unrooted shoots is r elatively rapid in vitro but is largely offset by the greater time req uired for weaning, pricking out, and growth in the nursery.