Molecular systematics of the generaLaurencia, OsmundeaandPalisada(Rhodophyta) from the Canary Islands - Analysis of rDNA and RUBISCO spacer sequences

[摘要] The molecular systematics ofLaurencia, OsmundeaandPalisada(Rhodomelaceae, Ceramiales) species from the Canary Islands has been determined by analysis sequences of the ribulose,1-5, bisphosphate carboxylase (RUBISCO) spacer from the plastid genome and the internal transcribed spacers (ITS1 and ITS2) and the rDNA 5.8S coding region from the nuclear genome. Comparison of sequence data showed an identity of 72-83 % between the species. Three taxonomic group were identified that correspond to established phylogenetic taxons. Phylogenetic trees using both parsimony and maximum-likelihood methods were derived from the sequence data; the trees indicate thatO. pinnatifidaappears to be the most distantly related species from theLaurenciaandPalisadaspecies. The exact phylogenetic position ofLaurenciasp. A (“amarilla�?) need additional studies.

[学科分类] 植物学

[关键词] Laurencia;Osmundea;Palisada;Phylogeny;Canary Islands