Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20658
Title: Chromosome evolution in 'Bulbine glauca' (Asphodelaceae or Xanthorrhoeaceae subfam. Asphodeloideae) indicates six species, not one
Contributor(s): Moore, Iain S F (author); Brown, Elizabeth A (author); Telford, Ian R H  (author); Bruhl, Jeremy J  (author)orcid 
Publication Date: 2016
DOI: 10.1071/bt15242
Handle Link: https://hdl.handle.net/1959.11/20658
Abstract: ￵￵The genus 'Bulbine' Wolf has ~130 species in Africa and only seven species in Australia. Base chromosome numbers in African and Australian 'Bulbine' are x = 7 and x = 12, respectively. This raises the possibility of Australian 'Bulbine' being of polyploidy origin or, alternatively African 'Bulbine' may have evolved through dysploid reduction. Previous chromosome counts in 'Bulbine glauca' (Raf.) E.M.Watson were predominantly 2n = 46, with aneuploid numbers of 2n = 45, 44, 48, 47, 40 and 41 also being encountered within and between populations. Novel chromosome counts are presented here for a wide sample of populations of 'B. glauca', occurring on volcanic and granite outcrops along the New South Wales and Victorian tablelands and on granite outcrops in Tasmania. Chromosome numbers for 'Bulbine crassa' D.I.Morris and Duretto is 2n = 26. The modal chromosome count for 'B. glauca' is confirmed as 2n = 46 with no evidence of aneuploidy. The species complex shows a variable asymmetric karyotype across its distribution, indicating karyotypic evolution involving structural rearrangements. There appear to be six distinctive groups within the complex based on karyomorphology. Evolutionary changes in both 'B. glauca s. lat.' and 'B. crassa' appear to have not involved recent polyploidy. Variation in chromosome morphology across the 'B. glauca' complex is consistent with our morphological evidence of more than one species.
Publication Type: Journal Article
Source of Publication: Australian Journal of Botany, 64(3), p. 206-218
Publisher: CSIRO Publishing
Place of Publication: Australia
ISSN: 1444-9862
0067-1924
Fields of Research (FoR) 2008: 060310 Plant Systematics and Taxonomy
Fields of Research (FoR) 2020: 310410 Phylogeny and comparative analysis
310411 Plant and fungus systematics and taxonomy
310402 Biogeography and phylogeography
Socio-Economic Objective (SEO) 2008: 960805 Flora, Fauna and Biodiversity at Regional or Larger Scales
Socio-Economic Objective (SEO) 2020: 180606 Terrestrial biodiversity
280102 Expanding knowledge in the biological sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

Files in This Item:
2 files
File Description SizeFormat 
Show full item record

Page view(s)

2,072
checked on May 21, 2023
Google Media

Google ScholarTM

Check

Altmetric


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.