Relationships of the Porphyra (Bangiales, Rhodophyta) flora of the Falkland Islands: a molecular survey using rbcL and nSSU sequence data

The phylogenetic relationships of Porphyra collected from the Falkland Islands have been examined using molecular data from two loci, the plastid rbcL gene and the nuclear nSSU gene, in conjunction with morphological observations. Nine species have been distinguished, belonging to four distinct line...

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Bibliographic Details
Published in:Australian Systematic Botany
Main Authors: Broom, JES, Nelson, WA, Farr, TJ, Phillips, LE, Clayton, M
Format: Article in Journal/Newspaper
Language:English
Published: CSIRO Publishing 2010
Subjects:
RIBOSOMAL-RNA GENE
PHYLOGENETIC-RELATIONSHIPS
QUATERNARY GLACIATIONS
NUCLEOTIDE-SEQUENCE
SOUTHERN-OCEAN
NUCLEAR SSU
RED ALGA
SUBSTITUTION
EVOLUTION
RADIATION
New Zealand
Southern Ocean
North Atlantic
Online Access:http://hdl.handle.net/2292/10779
https://doi.org/10.1071/SB09033
Description
Summary:The phylogenetic relationships of Porphyra collected from the Falkland Islands have been examined using molecular data from two loci, the plastid rbcL gene and the nuclear nSSU gene, in conjunction with morphological observations. Nine species have been distinguished, belonging to four distinct lineages within the Bangiales, differing from one another by 16–137 substitutions in the rbcL gene. One species is closely related to P. amplissima, a north Atlantic taxon, three are resolved in a clade that includes several species from New Zealand, Australia and South Africa, as well as P. umbilicalis, whereas four others are more closely related to Southern Ocean species, including P. cinnamomea, P. virididentata and several as yet unnamed taxa from New Zealand, Australia and South Africa. Three species, one of which we identify as P. columbina, appear to be widely distributed in the Southern Ocean, with representatives on the Falkland Islands and on islands of the Australian and New Zealand subantarctic.

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