Molecular phylogeny of the Dictyotales and their position within the Phaeophyceae, based on nuclear, plastid and mitochondrial DNA sequence data.
Mol Phylogenet Evol
; 49(1): 211-26, 2008 Oct.
Article
de En
| MEDLINE
| ID: mdl-18652904
ABSTRACT
For the first time, on the basis of nuclear, plastid and mitochondrial sequence data, the most comprehensive molecular phylogeny of the Dictyotales to date is presented, in a broad context where all brown algal orders are included (except Discosporangiales, Ascoseirales and Nemodermatales). A veto supertree approach was used here to evaluate congruency and conflicts between genes phylogenetic signal was congruent and mainly carried by chloroplastic information. Supermatrix analyses (BI, ML and MP) revealed that Dictyotales is sister to Onslowiales, this ensemble being sister of a clade also encompassing Sphacelariales and Syringodermatales. The family Scoresbyellaceae is merged into the family Dictyotaceae. Furthermore, the current subdivision of the Dictyotaceae into two tribes was not supported. The enigmatic genus Stoechospermum was shown to belong to the same clade as Dictyota, Rugulopteryx, Scoresbyella and Canistrocarpus. Homoeostrichus and Dictyopteris did not appear monophyletic. Zonaria stipitata clustered with the Spatoglossum species; since this is consistent with its morphological features, the new combination Spatoglossum stipitatum is proposed accordingly.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Phylogenèse
/
Phaeophyceae
Type d'étude:
Prognostic_studies
Langue:
En
Journal:
Mol Phylogenet Evol
Sujet du journal:
BIOLOGIA
/
BIOLOGIA MOLECULAR
Année:
2008
Type de document:
Article
Pays d'affiliation:
France