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 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.
Coyer
James A
JA
Department of Marine Biology, Centre for Ecological and Evolutionary Studies, University of Groningen, 9750 AA Haren, The Netherlands. j.a.coyer@rug.nl
Hoarau
Galice
G
Oudot-Le Secq
Marie-Pierre
MP
Stam
Wytze T
WT
Olsen
Jeanine L
JL
D001267:Atlantic Ocean; D001483:Base Sequence; D004272:DNA, Mitochondrial / Q000235:genetics; D044645:Fucus / Q000145:classification* / Q000235:genetics; D008969:Molecular Sequence Data; D010140:Pacific Ocean; D010802:Phylogeny
D004272:DNA, Mitochondrial