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.
Department of Marine Biology, Centre for Ecological and Evolutionary Studies, University of Groningen, 9750 AA Haren, The Netherlands. j.a.coyer@rug.nl
James A
JA
Coyer
Galice
G
Hoarau
Marie-Pierre
MP
Oudot-Le Secq
Wytze T
WT
Stam
Jeanine L
JL
Olsen
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