University Of Tasmania
Browse

File(s) under permanent embargo

The evolutionary significance of hybridization in Eucalyptus

journal contribution
posted on 2023-05-26, 10:31 authored by Bradley PottsBradley Potts, James ReidJames Reid
In a recent article, we presented a novel mechanism of plant migration by long distance interspecific hybridization followed by back selection to the phenotype of the pollen parent and suggested that hybridization may be of evolutionary significance as a means of gene dispersal where the adapuve response is limited by restricted seed dispersal (Potts and Reid, 1988). In our study area the localized Eucalyptus risdonii appeared to be invading the rangeofthe surrounding, more widespread species E, amygduiina by bath pollen and seed dispersal (Potts, 1986) and from estimates of the diatance of pollen- and seed-mediated dispersal of E. nsdonii we sugsestedthat interspecific hybridization may double the rate of Raw of E. risdonii genes into the range of E. amygdaiina (Potts and Reid, 1988). However, Schemskc and Morgan (1990) have questioned this conclusion on the basis of our failure to consider intraspecific pollen dispersal, potential bias in the estimation of interspecific gene Row (e.g., small sample sizes, life history effects, rarity of hybridization) and

History

Publication title

Evolution

Volume

44

Article number

8

Number

8

Pagination

2151-2152

ISSN

0014-3820

Publication status

  • Published

Rights statement

BM Potts.

Repository Status

  • Restricted