Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-42748

Linder, H P (2010). Gradual speciation in a global hotspot of plant diversity. Molecular Ecology, 19(21):4583-4585.

[img] PDF (Verlags-PDF) - Registered users only
1MB

View at publisher

Abstract

The speciation process that underlies recent, rapid radiations of plants is controversial, and suggested mechanisms range from pollinator or ecological niche differentiation to allopatry and nonadaptive divergence. Phylogenetic approaches to locating the most appropriate speciation models have been constrained by the low levels of molecular divergence between recently diverged species, which are typical of recent, rapid radiations. In this issue of Molecular Ecology, Rymer et al. (2010) used coalescence analyses of sequence data and genome scans of Amplified Fragment Length Polymorphism (AFLP) loci to demonstrate that in a species complex in the irid genus Gladiolus, a member of the hyper diverse Cape flora of southern Africa, speciation is a gradual process. Older divergences are genetically more differentiated, and show a greater difference in flowering time and floral morphology, than taxa that diverged more recently. There is no evidence of any abrupt events. Gene flow is limited by shifts in flowering time and floral morphology; thus, by pre-zygotic rather than by post-zygotic mechanisms, these evolved together with the occupation of somewhat different habitats. This research gives the first critical insight into how the remarkable diversity in a diversity hotspot could have arisen. More importantly, it demonstrates that the speciation process in recent, rapid radiations is tractable and can be investigated with suitable genetic tools.

Citations

2 citations in Web of Science®
2 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

1 download since deposited on 23 Jan 2011
0 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Systematic Botany and Botanical Gardens
DDC:580 Plants (Botany)
Language:English
Date:2010
Deposited On:23 Jan 2011 18:01
Last Modified:27 Nov 2013 23:41
Publisher:Wiley-Blackwell
ISSN:0962-1083
Additional Information:Comment on: Mol Ecol. 2010 Nov;19(21):4765-82.
Publisher DOI:10.1111/j.1365-294X.2010.04798.x
PubMed ID:20958810

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page