The salt-waterlogging tolerance of Eucalyptus camaldulensis x E-globulus hybrids

The salt-waterlogging tolerance of Eucalyptus camaldulensis x E. globulus h ybrids was compared with parental clones of E. camaldulensis, open-pollinat ed seedlings of E. globulus and E. camaldulensis x E. camaldulensis seedlin gs in a glasshouse trial. Seven-month-old plants were waterlogged for 10 we eks with a saline solution of increasing concentration to 350 mmol NaCl/L. Eucalyptus camaldulensis had higher tolerance to salt-waterlogging than E. globulus as assessed by survival and height growth rate. The performance of the hybrid families was intermediate between the 2 parental species as was the performance of progeny from crosses between salt tolerant E. camaldule nsis parents. Within families some hybrid individuals performed as well as the E. camaldulensis parents. The most tolerant plants have been micropropa gated for further experiments and field trials on saline agricultural land.