CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Australian Journal of Botany   
Australian Journal of Botany
Journal Banner
  Southern Hemisphere Botanical Ecosystems
 
blank image Search
 
blank image blank image
blank image
 
  Advanced Search
   

Journal Home
About the Journal
Editorial Board
Contacts
Content
Current Issue
Just Accepted
All Issues
Special Issues
Turner Review Series
Sample Issue
For Authors
General Information
Notice to Authors
Submit Article
Open Access
For Referees
Referee Guidelines
Review an Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter youtube

red arrow PrometheusWiki
blank image
PrometheusWiki
Protocols in ecological and environmental plant physiology

 

Article << Previous     |         Contents Vol 53(2)

How do rare Boronia species differ from their more widespread congeners?

A. Shapcott A B, R. W. Lamont A, A. Thomson A

A University of the Sunshine Coast, Maroochydore DC 4558, Qld, Australia.
B Corresponding author. Email: ashapcot@usc.edu.au
 
PDF (281 KB) $25
 Export Citation
 Print
  


Abstract

The vulnerable Boronia keysii Domin. (Rutaceae; BK) and the rare B. rivularis White. (BR), endemic to the Sunshine Coast region of Queensland, and the more widespread B. safrolifera Cheel. (BS) and B. falcifolia (BF), were studied. The taxonomic distinctiveness between the morphologically similar B. rivularis and its more southern congener B. safrolifera had previously been in question. This study clearly confirmed the long genetic separation of these two species. High levels of reproductive activity (%R) were observed in both of the threatened species (B. keysii: %R = 84; B. rivularis: %R = 66), which were also found to differ fundamentally in response to fire (obligate seed regenerators) from the more widespread species (facultative resprouters). Genetic diversity was not consistently related to rarity since B. keysii (vulnerable; He = 0.282) and B. falcifolia (common; He = 0.294) had significantly (P < 0.05) higher genetic diversity than did B. rivularis (rare; He = 0.155) and B. safrolifera (common; He = 0.197). There was no relationship between population differentiation and geographic distribution of species since B. keysii (FST = 0.293) and B. safrolifera (FST = 0.283) exhibited lower between-population diversity than did B. rivularis (FST = 0.360) and B. falcifolia (FST = 0.324). The average number of migrants per generation was less than one in all species (Nm = 0.604 for BK; 0.444 for BR; 0.634 for BS; 0.522 for BF). All four species are effectively inbred; however, B. keysii (F = 0.85) and B. falcifolia (F = 0.90) had significantly (P < 0.05) higher levels of inbreeding than did B. rivularis (F = 0.621) and B. safrolifera (F = 0.472), indicating that inbreeding was not determined by conservation status.

   
Subscriber Login
Username:
Password:  

    
Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2014