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Gene flow between introduced and native Eucalyptus species


Barbour, RC and Potts, BM and Vaillancourt, RE and Tibbits, WN and Wiltshire, RJE, Gene flow between introduced and native Eucalyptus species, New Forests, 23, (3) pp. 177-191. ISSN 0169-4286 (2002) [Refereed Article]

DOI: doi:10.1023/A:1020389432492


The first evidence of in situ F1 hybridisation between an introduced eucalypt plantation species, Eucalyptus nitens, and a native eucalypt species is presented. Open-pollinated seed was collected from a mature E. nitens trial and from the adjacent native species, E. ovata and E. viminalis on the island of Tasmania. Nearly 70 000 seedlings were grown to a size at which hybrids could be clearly distinguished from pure species seedlings on the basis of morphology and a nearly species-specific isozyme allele. Hybridisation was observed between E. nitens and E. ovata, but no hybrids involving E. viminalis were found. This pattern of hybridisation was consistent with the flowering time overlap between the E. ovata and E. nitens. Eucalyptus nitens progenies displayed a low and relatively homogeneous level of hybridisation, averaging 0.15% per tree. In comparison, the proportion of hybrids obtained from the adjacent E. ovata trees varied from 0.04 to 16% per tree. Whether progeny arising from such hybridisation will survive and grow in nature to allow for backcrossing and introgression of the exotic genes into the native population is not yet known.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Tree improvement (incl. selection and breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Barbour, RC (Dr Robert Barbour)
UTAS Author:Potts, BM (Professor Brad Potts)
UTAS Author:Vaillancourt, RE (Professor Rene Vaillancourt)
UTAS Author:Tibbits, WN (Dr Wayne Tibbits)
UTAS Author:Wiltshire, RJE (Dr Robert Wiltshire)
ID Code:24457
Year Published:2002
Web of Science® Times Cited:35
Deposited By:Plant Science
Deposited On:2002-08-01
Last Modified:2011-11-23

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