A mtDNA-based phylogeny of the brown algal genus Fucus (Heterokontophyta; Phaeophyta)

Species of Fucus are among the dominant seaweeds along Northern Hemisphere shores, but taxonomic designations often are confounded by significant intraspecific morphological variability. We analyzed intra- and inter-specific phylogenetic relationships within the genus (275 individuals representing 1...

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Bibliographic Details
Published in:Molecular Phylogenetics and Evolution
Main Authors: Coyer, JA, Hoarau, G, Oudot-Le Secq, MP, Stam, WT, Olsen, JL
Format: Article in Journal/Newspaper
Language:English
Published: 2006
Subjects:
Fucus
mtDNA
phylogeny
center of origin
hybridization
trans-Arctic connectivity
species-level paraphyly/polyphyly
POPULATION GENETIC-STRUCTURE
DISTICHUS L POWELL
MORPHOLOGICAL VARIATION
NATURAL-POPULATIONS
MITOCHONDRIAL-DNA
NEW-ENGLAND
BALTIC SEA
EVANESCENS HETEROKONTOPHYTA
VESICULOSUS FUCACEAE
MICROSATELLITE LOCI
Arctic
Pacific
North Atlantic
Online Access:https://hdl.handle.net/11370/7851a56d-355a-404e-892f-a07a313dc0c4
https://research.rug.nl/en/publications/7851a56d-355a-404e-892f-a07a313dc0c4
https://doi.org/10.1016/j.ympev.2006.01.019
Description
Summary:Species of Fucus are among the dominant seaweeds along Northern Hemisphere shores, but taxonomic designations often are confounded by significant intraspecific morphological variability. We analyzed intra- and inter-specific phylogenetic relationships within the genus (275 individuals representing 16 taxa) using two regions of the mitochondrion: a variable intergenic spacer and a conserved portion of the 23S subunit. Bayesian ML and MP analyses verified a shallow phylogeny with two major lineages (previously reported) and resolved some intra-lineage relationships. Significant species-level paraphyly/polyphyly was observed within lineages 1A and 2. Despite higher species richness in the North Atlantic, a North Pacific origin of the genus is supported by a gradient of decreasing haplotype and nucleotide diversities in F distichus from the North Pacific to the East Atlantic. (c) 2006 Elsevier Inc. All rights reserved.

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