Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

A field trial of progeny of trees intermediate between Eucalyptus regnans and E. obliqua.

Abstract

The progeny of 2 provenances of E. regnans and 1 of E. obliqua were compared with progeny of 4 natural populations whose bark characteristics were intermediate between the 2 species. Assessment to age 15 yr showed that seed from the intermediate populations produced stands with intermediate mean trait values for ht. of rough bark stocking (ht. at which the bark becomes smooth and gum-like), bark thickness, leaf shape, and lignotuber frequency. There was as much variation within intermediate populations as between the species for total ht., % survival, d.b.h.o.b., plot b.a., and vol; morphological intermediacy is thus not a useful indicator of progeny performance. There was no correlation between bark morphology and growth. An intermediate form (Otway messmate) with potential for plantation use grew as well as the best E. regnans provenance. From authors' summary.