Library Open Repository
Phenetic affinities, variability and conservation status of a rare Tasmanian endemic Eucalyptus morrisbyi R.G.Brett
Wiltshire, RJE and Potts, BM and Reid, JB (1991) Phenetic affinities, variability and conservation status of a rare Tasmanian endemic Eucalyptus morrisbyi R.G.Brett. Papers and Proceedings of the Royal Society of Tasmania, Aspect. pp. 213-230. ISSN 0080-4703
Wiltshire_Phene...pdf | Download (515kB)
Available under University of Tasmania Standard License.
Eucalyptus morrisbyi is a rare Tasmanian endemic confined to one larger population (c, 2000 mature individuals) and two
smaller populations (c, 15 and 16 mature individuals; in southeastern Tasmania. Morphological studies within the informal
superspecies "Gunnii" reveal Eucalyptus morrisbyi has closest affinities to low altitude populations of E, gunnii In southeastern
Tasmania and yet has distinct, phenetic differences from that species. Levels of variation in E. morrisbyi populations appear
comparable to other species despite their small population size. A low frequency of hybridisation occurs with E, viminalis in
natural stands but is unlikely to have affected the level of variability in the Calverts Hill and Risdon Hill natural populations.
In contrast, it is shown that a high frequency of seedlings grown from a planted and a remnant stand of E, morrisbyi have affinities
with E, virninalis. Several of the planted trees appeared to be hybrids and some progeny from phenotypically normal trees also
appeared to be of hybrid origin. These results suggest that the genetic integrity of the species may be compromised by injudicious
selection of seed for propagation from plantings and could be a major problem for the ex situ conservation of this and other rare
and endangered species. Recommendations are given to enhance the conservation of this endangered Tasmanian endemic.
|Keywords:||Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library|
|Journal or Publication Title:||Papers and Proceedings of the Royal Society of Tasmania|
|Page Range:||pp. 213-230|
|Collections:||Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania|
This Symposium is a tribute to the botanical work of Dr. Winifred M. Curtis AM, work largely concerned with Tasmanian plants. Scientific and public knowledge of the Tasmania flora has been greatly enhanced by her contributions.
|Date Deposited:||03 Aug 2012 01:19|
|Last Modified:||18 Nov 2014 04:39|
|Item Statistics:||View statistics for this item|
Actions (login required)
|Item Control Page|