IMIS | Vlaams Instituut voor de Zee
 

Vlaams Instituut voor de Zee

Platform voor marien onderzoek

IMIS

Publicaties | Instituten | Personen | Datasets | Projecten | Kaarten
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

A multi-locus time-calibrated phylogeny of the brown algae (Heterokonta, Ochrophyta, Phaeophyceae): Investigating the evolutionary nature of the ‘‘brown algal crown radiation”
Silberfeld, T.; Leigh, J. W.; Verbruggen, H.; Cruaud, C.; de Reviers, B.; Rousseau, F. (2010). A multi-locus time-calibrated phylogeny of the brown algae (Heterokonta, Ochrophyta, Phaeophyceae): Investigating the evolutionary nature of the ‘‘brown algal crown radiation”. Mol. Phylogenet. Evol. 56(2): 659-674. dx.doi.org/10.1016/j.ympev.2010.04.020
In: Molecular Phylogenetics and Evolution. Elsevier: Orlando, FL. ISSN 1055-7903; e-ISSN 1095-9513, meer
Peer reviewed article  

Beschikbaar in  Auteurs 
    VLIZ: Open Repository 227041 [ OMA ]

Trefwoorden
    Phaeophyceae [WoRMS]; Marien
Author keywords
    Phaeophyceae; Brown algal crown radiation; Multi-marker phylogeny; Time-calibrated phylogeny; Bayesian relaxed molecular clock; Hard; soft polytomy; Non-molecular characters evolution

Auteurs  Top 
  • Silberfeld, T.
  • Leigh, J. W.
  • Verbruggen, H., meer
  • Cruaud, C.
  • de Reviers, B.
  • Rousseau, F.

Abstract
    The most conspicuous feature in previous phaeophycean phylogenies is a large polytomy known as the brown algal crown radiation (BACR). The BACR encompasses 10 out of the 17 currently recognized brown algal orders. A recent study has been able to resolve a few nodes of the BACR, suggesting that it may be a soft polytomy caused by a lack of signal in molecular markers. The present work aims to refine relationships within the BACR and investigate the nature and timeframe of the diversification in question using a dual approach. A multi-marker phylogeny of the brown algae was built from 10 mitochondrial, plastid and nuclear loci (>10,000 nt) of 72 phaeophycean taxa, resulting in trees with well-resolved inter-ordinal relationships within the BACR. Using Bayesian relaxed molecular clock analysis, it is shown that the BACR is likely to represent a gradual diversification spanning most of the Lower Cretaceous rather than a sudden radiation. Non-molecular characters classically used in ordinal delimitation were mapped on the molecular topology to study their evolutionary history.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs