Molecular Biology and Evolution, Vol 12, 671-678, Copyright © 1995 by Society for Molecular Biology and Evolution
G Van der Auwera, R De Baere, Y Van de Peer, P De Rijk, I Van den Broeck and R De Wachter
Based on biochemical and ultrastructural data, hyphochytriomycetes are
believed to share an ancestor with oomycetes and heterokont algae. In order
to study the phylogeny of the hyphochytriomycetes, we determined both the
small- and large-subunit ribosomal RNA sequence of Hyphochytrium
catenoides. Phylogenetic trees were constructed using the neighbor-joining
and maximum-parsimony method and include representatives of Chlorobionta,
Fungi, Metazoa, Alveolata, and all known Heterokonta. Our main conclusion
is that the hyphochytriomycetes form a monophyletic group with the
oomycetes and heterokont algae and that they are probably the closest
relatives of the oomycetes. However, the order of divergence between the
various heterokont algal phyla and the oomycete-hyphochytriomycete cluster
remains uncertain.
ORIGINAL ARTICLE
The phylogeny of the Hyphochytriomycota as deduced from ribosomal RNA sequences of Hyphochytrium catenoides
Departement Biochemie, Universiteit Antwerpen (UIA), Belgium.
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