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Genetic variation in the spinning gum, Eucalyptus perriniana F. Muell. ex Rodway
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Two Tasmanian populations of E. perriniana were examined to determine the extent of morphological
variation between two gene pools that have been isolated for perhaps thousands of years. Surprisingly
few differences were noted despite small population sizes, high levels of disturbance and high levels of
hybridisation with E. rodwayi. When compared to mainland E. perriniana, large genotypic differences
were noted: e.g. mainland E. perriniana seeds required stratification whereas Tasmanian seeds did not.
The growth rates, leaf shape and colour also differed markedly but reproductive characters did not.
These differences are possibly the products of differing selective pressures associated with altitudinal
differences rather than random genetic drift or introgressive hybridisation. Developmental abnormalities
were noted which seem to indicate that the distinctive connate form of the juvenile leaves is under
relatively simple control mechanisms.
|Journal or Publication Title:||Australian Journal of Botany|
|Page Range:||pp. 33-47|
|Identification Number - DOI:||10.1071/BT9870033|
BM Potts. Copyright © 1987 CSIRO
|Date Deposited:||11 Sep 2008 23:34|
|Last Modified:||18 Nov 2014 03:48|
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