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A paedomorphocline in Eucalyptus: natural variation in the E. risdonii / E. tenuiramis complex


Wiltshire, RJE and Potts, BM and Reid, JB, A paedomorphocline in Eucalyptus: natural variation in the E. risdonii / E. tenuiramis complex, Australian Journal of Botany, 39, (6) pp. 545-566. ISSN 0067-1924 (1991) [Refereed Article]

Copyright Statement

Copyright 1991 CSIRO

DOI: doi:10.1071/BT9910545


Ontogenetic and morphological variation in 40 natural populations of the closely related species, E. risdonii and E. tenuiramis, were assessed in a multivariate study of juvenile and adult leaf and fruit characters. The present taxonomic separation of the two taxa is based mainly on ontogenetic differences, but this study reveals that the variation between the two taxa in the retention of the juvenile leaf habit is continuous and may represent a paedomorphocline. The morphological data suggest that at least four phenetic groups are required to summarise the morphological variation in the E. risdonii / E. tenuiramis complex. When ontogenetic variation is removed, the morphological variation between some E. risdonii and some E. tenuiramis populations is also continuous and much smaller than the morphological differences within E. tenuiramis. This suggests that E. risdonii may be the product of relatively recent changes in developmental timing (heterochrony) from E. tenuiramis.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant biology not elsewhere classified
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Terrestrial biodiversity
UTAS Author:Wiltshire, RJE (Dr Robert Wiltshire)
UTAS Author:Potts, BM (Professor Brad Potts)
UTAS Author:Reid, JB (Professor Jim Reid)
ID Code:87386
Year Published:1991
Web of Science® Times Cited:22
Deposited By:Plant Science
Deposited On:2013-11-14
Last Modified:2013-12-05

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